Title stringlengths 15 150 | A_Id int64 2.98k 72.4M | Users Score int64 -17 470 | Q_Score int64 0 5.69k | ViewCount int64 18 4.06M | Database and SQL int64 0 1 | Tags stringlengths 6 105 | Answer stringlengths 11 6.38k | GUI and Desktop Applications int64 0 1 | System Administration and DevOps int64 1 1 | Networking and APIs int64 0 1 | Other int64 0 1 | CreationDate stringlengths 23 23 | AnswerCount int64 1 64 | Score float64 -1 1.2 | is_accepted bool 2
classes | Q_Id int64 1.85k 44.1M | Python Basics and Environment int64 0 1 | Data Science and Machine Learning int64 0 1 | Web Development int64 0 1 | Available Count int64 1 17 | Question stringlengths 41 29k |
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Asynchronous URLfetch when we don't care about the result? [Python] | 5,412,695 | 7 | 6 | 3,248 | 0 | python,google-app-engine,asynchronous,urlfetch | A task queue task is your best option here. The message you're seeing in the log indicates that the request is waiting for your URLFetch to complete before returning, so this doesn't help. You say a task is 'overkill', but really, they're very lightweight, and definitely the best way to do this. Deferred will even allo... | 0 | 1 | 0 | 0 | 2011-03-23T20:34:00.000 | 2 | 1.2 | true | 5,411,291 | 0 | 0 | 1 | 1 | In some code I'm writing for GAE I need to periodically perform a GET on a URL on another system, in essence 'pinging' it and I'm not terribly concerned if the request fails, times out or succeeds.
As I basically want to 'fire and forget' and not slow down my own code by waiting for the request, I'm using an asynchrono... |
Optimizing join query performance in google app engine | 5,415,555 | 0 | 1 | 372 | 1 | python,google-app-engine | The standard solution to this problem is denormalization. Try storing a copy of price and profit in Entity1 and then you can answer your question with a single, simple query on Entity1. | 0 | 1 | 0 | 0 | 2011-03-24T05:58:00.000 | 2 | 0 | false | 5,415,342 | 0 | 0 | 1 | 1 | Scenario
Entity1 (id,itmname)
Entity2 (id,itmname,price)
Entity3 (id,itmname,profit)
profit and price are both IntegerProperty
I want to count all the item with price more then 500 and profit more then 10.
I know its join operation and is not supported by google. I tried my best to find out the way other then executi... |
Feedback on different backends for GWT | 5,421,810 | 1 | 4 | 1,559 | 1 | java,python,gwt,architecture,web-frameworks | We had the same dilemma in the past.
I was involved in designing and building a system that had a GWT frontend and Java (Spring, Hibernate) backend. Some of our other (related) systems were built in Python and Ruby, so the expertise was there, and a question just like yours came up.
We decided on Java mainly so we cou... | 0 | 1 | 0 | 0 | 2011-03-24T09:56:00.000 | 1 | 1.2 | true | 5,417,372 | 0 | 0 | 1 | 1 | I have to re-design an existing application which uses Pylons (Python) on the backend and GWT on the frontend.
In the course of this re-design I can also change the backend system.
I tried to read up on the advantages and disadvantages of various backend systems (Java, Python, etc) but I would be thankful for some feed... |
reducing I/O on application and database | 5,426,527 | 0 | 2 | 202 | 1 | python,mysql,amazon-ec2,mysql-management | You didn't really specify whether it was writes or reads. My guess is that you can do it all in a mysql instance in a ramdisc (tmpfs under Linux).
Operations such as ALTER TABLE and copying big data around end up creating a lot of IO requests because they move a lot of data. This is not the same as if you've just got a... | 0 | 1 | 0 | 1 | 2011-03-24T20:44:00.000 | 2 | 0 | false | 5,425,289 | 0 | 0 | 0 | 1 | Is there a way to reduce the I/O's associated with either mysql or a python script? I am thinking of using EC2 and the costs seem okay except I can't really predict my I/O usage and I am worried it might blindside me with costs.
I basically develop a python script to parse data and upload it into mysql. Once its in... |
How do I make my website on Google App Engine accessible to visitors in China? | 5,436,314 | 1 | 2 | 534 | 0 | python,google-app-engine | Assuming Google has, and routes to, Datacenters in Asia, the latency should be reasonable.
The reverse proxy to avoid the firewall should be in a country that does not censor and is as near as possible to the target area.
In those conditions, google would choose a datacenter near your reverse proxy, and the latency is ... | 0 | 1 | 0 | 0 | 2011-03-25T17:54:00.000 | 2 | 0.099668 | false | 5,436,249 | 0 | 0 | 1 | 1 | China blocks appspot -- How do I get around this?
Assuming the censorship was not an issue, how bad are the latency issues? |
Is there a difference between developing a web2py app on Windows or Linux? | 5,444,972 | 2 | 2 | 1,990 | 0 | python,web2py | No, there is a Windows installer. | 0 | 1 | 0 | 0 | 2011-03-26T19:35:00.000 | 3 | 0.132549 | false | 5,444,798 | 0 | 0 | 1 | 1 | I recall setting up other frameworks in a Windows environment were extremely painful :) |
Record audio in Google App Engine using rtmplite? | 5,450,822 | 5 | 3 | 981 | 0 | python,google-app-engine,rtmp | Google App Engine is tricky for RTMP because it does not support sockets. You would have to use something like RTMPT which is tunneled over HTTP, however, this tunneling incurs latency so if you are looking to do anything realtime this could become an issue.
Currently rtmplite does not support RTMPT so this would not b... | 0 | 1 | 0 | 0 | 2011-03-27T06:30:00.000 | 2 | 0.462117 | false | 5,447,631 | 0 | 0 | 1 | 2 | I am in the process of building a Google App Engine application which requires audio to be recorded and saved in our database. I have found no alternative to using some form of RTMP server for recording audio through flash, so [rtmplite] (http://code.google.com/p/rtmplite/) came into our horizon.
Since I have no experi... |
Record audio in Google App Engine using rtmplite? | 6,433,502 | 0 | 3 | 981 | 0 | python,google-app-engine,rtmp | Try appengine backends, they currently don't whitelist a lot of things required for such streaming. But they might soon do so. Once they enable sockets, then rtmplite or rtmpy could easily be ported to run there. Backends already support unlimited request length which is required for streaming. | 0 | 1 | 0 | 0 | 2011-03-27T06:30:00.000 | 2 | 0 | false | 5,447,631 | 0 | 0 | 1 | 2 | I am in the process of building a Google App Engine application which requires audio to be recorded and saved in our database. I have found no alternative to using some form of RTMP server for recording audio through flash, so [rtmplite] (http://code.google.com/p/rtmplite/) came into our horizon.
Since I have no experi... |
how to have google apps engine send mail- not send a copy of the mail to the sender | 5,450,093 | 6 | 3 | 288 | 0 | python,google-app-engine,sendmail | You can't. Sending email from someone without their knowledge isn't permitted by App Engine.
You can send email from any administrator address; you could add a "donotreply@yourapp.com" type address as an administrator and send email from that address. | 0 | 1 | 0 | 0 | 2011-03-27T10:38:00.000 | 1 | 1.2 | true | 5,448,698 | 0 | 0 | 1 | 1 | I'm using GAE send mail- but I dont want the sender of the mail to get a coppy of the mail.
as for now, when a user is sending mail he gets a mail saying that he sent a mail to someone and the body of the sent mail, how do I disable that? |
vimrc mapping problem; execute python script mapping not working from vimrc | 5,449,239 | 2 | 0 | 764 | 0 | python,map,vim | I suspect that you have something before map: <buffer> argument means that mapping is defined for current buffer only, so adding it to vimrc without something like autocmd FileType python before it is weird. Maybe it is the reason why it does not work: you somehow switch to another buffer before testing this mapping.
S... | 0 | 1 | 0 | 0 | 2011-03-27T12:28:00.000 | 2 | 1.2 | true | 5,449,207 | 0 | 0 | 0 | 2 | grr. I'm struggling with Vim's learning curve.
And trying to get a simple mapping in my vimrc to execute the current buffer's python script.
The mapping is well-formed and works after I enter it into the command line in Vim. This is the mapping:
map <buffer> <S-e> :w<CR>:!usr/bin/env python % <CR>
But it won't ... |
vimrc mapping problem; execute python script mapping not working from vimrc | 5,449,247 | 0 | 0 | 764 | 0 | python,map,vim | Jesus, Murphy's Law.
After searching for an answer for an hour, 1 min after posting this q I solved it. The problem was <buffer> in the mapping.
Removing it made the mapping work, thus:
nnoremap E w:<CR>:!python % <CR> | 0 | 1 | 0 | 0 | 2011-03-27T12:28:00.000 | 2 | 0 | false | 5,449,207 | 0 | 0 | 0 | 2 | grr. I'm struggling with Vim's learning curve.
And trying to get a simple mapping in my vimrc to execute the current buffer's python script.
The mapping is well-formed and works after I enter it into the command line in Vim. This is the mapping:
map <buffer> <S-e> :w<CR>:!usr/bin/env python % <CR>
But it won't ... |
Update Two Related Files On Disk In a "Secure" Way? | 5,453,629 | 2 | 3 | 90 | 0 | python,linux,binary,atomic | Do what the RDBMS engines do.
Write an "update sequence number" in each file.
You cannot ever guarantee that both files are written.
However, you can compare the update sequence numbers to see if the files have the same sequence number.
If the sequence numbers disagree, it's logically equivalent to no file having been... | 0 | 1 | 0 | 0 | 2011-03-27T23:05:00.000 | 3 | 0.132549 | false | 5,453,101 | 0 | 0 | 0 | 1 | I have two binary files that are related one to another (meaning, when one file's records are updated, the other file's matching records should be updated as well). both files are binary files stored on disk.
The updation will look something like this:
UpdateFirstFile() -- first file is updated.....
UpdateSecondFile() ... |
Python Twisted does not work on Eclipse | 5,466,280 | 2 | 2 | 991 | 0 | python,eclipse,twisted,pydev | Make sure you:
Have PyDev installed
Have twisted / zope.interface installed and in your PYTHONPATH.
Have configured your eclipse project as a python/pydev project.
Have configured the interpreter in the Eclipse environment (Pydev settings). | 0 | 1 | 0 | 0 | 2011-03-28T19:04:00.000 | 1 | 1.2 | true | 5,463,782 | 1 | 0 | 1 | 1 | I installed Twisted for Python and I am trying to build a simple server on Eclipse and I am getting the following error:
ImportError: No module named zope.interface
I'm not sure how to correct this. Doesn't Twisted install all of the dependencies first? |
Environment for quickly developing routing protocol prototype | 5,473,481 | 1 | 2 | 1,573 | 0 | python,routing,network-programming,erlang,protocols | Erlang is very well suited for just a logical prototype without concrete implementation as well as implementing real world capable implementations of the protocols.
You don't need any other framework, just Erlang and OTP which comes with it is enough.
Even if you have to work down to packet level Erlang helps you with ... | 0 | 1 | 0 | 1 | 2011-03-28T21:00:00.000 | 3 | 0.066568 | false | 5,465,010 | 0 | 0 | 0 | 1 | I am doing research on routing protocols. Currently I perform simulations written in Python of a new protocol. The next step would be to build a real prototype which can really run on top of a Linux-based operating system (as a routing daemon such as ospfd).
What would be a well-suited programming environment/languag... |
Python IDLE equivalent of CTRL-R in R | 5,475,771 | 6 | 8 | 6,260 | 0 | python,r | No
In the shortcut key list in IDLE, in Options > Configure IDLE > Keys, in the Action - Key(s) list, one does not find any shortcut key for executing selected code. | 0 | 1 | 0 | 0 | 2011-03-29T16:14:00.000 | 3 | 1 | false | 5,475,649 | 0 | 0 | 0 | 1 | If you have a script open in the Windows version of R, you can run a line (or section of highlighted code) in the shell by hitting CTRL-R (believe it's command-enter in apple version). Is there similar functionality for IDLE? Many thanks |
Need CGI (or another solution compatible with IIS 7) to handle *massive* uploads | 5,479,573 | -1 | 1 | 300 | 0 | python,perl,iis,iis-7,cgi | the windows TCP stack is limited to 4GB file uploads. Anymore than that is not possible. | 0 | 1 | 0 | 0 | 2011-03-29T21:52:00.000 | 3 | -0.066568 | false | 5,479,387 | 0 | 0 | 1 | 2 | We need to handle massive file uploads without spending resources on an IIS 7 server. To emphasize how light-weight this needs to be, let's say that we need to handle file uploads of sizes that are completely insane, like 100GB uploads, or something that can continue running for an extremely long time without consuming... |
Need CGI (or another solution compatible with IIS 7) to handle *massive* uploads | 5,483,933 | 3 | 1 | 300 | 0 | python,perl,iis,iis-7,cgi | You want WebDAV, not CGI. It provides all the nice bits that make file transfers not suck, like resuming and pausing. | 0 | 1 | 0 | 0 | 2011-03-29T21:52:00.000 | 3 | 0.197375 | false | 5,479,387 | 0 | 0 | 1 | 2 | We need to handle massive file uploads without spending resources on an IIS 7 server. To emphasize how light-weight this needs to be, let's say that we need to handle file uploads of sizes that are completely insane, like 100GB uploads, or something that can continue running for an extremely long time without consuming... |
Does local GAE read and write to a local datastore file on the hard drive while it's running? | 5,486,121 | 3 | 0 | 196 | 0 | python,google-app-engine,local-storage | How the datastore reads and writes its underlying files varies - the standard datastore is read on startup, and written progressively, journal-style, as the app modifies data. The SQLite backend uses a SQLite database.
You shouldn't have to care, though - neither backend is designed for robustness in the face of failur... | 0 | 1 | 0 | 0 | 2011-03-30T10:09:00.000 | 2 | 1.2 | true | 5,484,900 | 0 | 0 | 1 | 1 | I have just noticed that when I have a running instance of my GAE application, there nothing happens with the datastore file when I add or remove entries using Python code or in admin console. I can even remove the file and still have all data safe and sound in admin area and accessible from code. But when I restart my... |
python file was renamed, how to get 'rename time' | 5,631,968 | 0 | 0 | 239 | 0 | python,file-management | It is impossible, OS does not store such info about files. Answered by 'atzz' in comment | 0 | 1 | 0 | 0 | 2011-03-31T10:54:00.000 | 2 | 1.2 | true | 5,498,704 | 1 | 0 | 0 | 1 | lets say that some files were renamed by Python script, is it possible to get this 'rename time' using Python (It can be seen in Far Manager)? (Windows)
It seems it is not possible through STAT, etc
Any ideas ? |
Event correlation and filtering - How to, where-to start? | 5,516,971 | 1 | 9 | 1,981 | 0 | python,erlang,machine-learning,classification,correlation | Your problem is a tactical problem as opposed to a procedural problem. Both types have their own set of tools, and you will be in a world of pain if you try to solve a tactical problem with procedural tools.
Just to clarify terms, when i say procedural, I am talking about use cases where you can say do X, then Y, then... | 0 | 1 | 0 | 0 | 2011-03-31T17:27:00.000 | 2 | 0.099668 | false | 5,503,820 | 0 | 0 | 0 | 1 | Got an asynchronous stream of events, where each event has information like -
Agency (one of many Agencies possible to be served by my solution)
Agent (one of many Agents in an Agency)
Served-Entity (a person/organization served by 1 or more agencies)
Date+Time
Class-Data (tags from a fixed but large set of tags)
Wha... |
Python append multiple files in given order to one big file | 57,903,899 | 0 | 21 | 67,484 | 0 | python,file,append | There's also the fileinput class in Python 3, which is perfect for this sort of situation | 0 | 1 | 0 | 0 | 2011-04-01T06:26:00.000 | 12 | 0 | false | 5,509,872 | 1 | 0 | 0 | 1 | I have up to 8 seperate Python processes creating temp files in a shared folder. Then I'd like the controlling process to append all the temp files in a certain order into one big file. What's the quickest way of doing this at an os agnostic shell level? |
I want to wait on both a file descriptor and a mutex, what's the recommended way to do this? | 5,525,008 | 5 | 21 | 10,042 | 0 | c++,python,linux,multithreading,event-driven | I've solved this exact problem using what you mention, pipe() and libevent (which wraps epoll). The worker thread writes a byte to its pipe FD when its output queue goes from empty to non-empty. That wakes up the main IO thread, which can then grab the worker thread's output. This works great is actually very simple... | 0 | 1 | 0 | 0 | 2011-04-02T17:41:00.000 | 8 | 0.124353 | false | 5,524,780 | 0 | 0 | 0 | 3 | I would like to spawn off threads to perform certain tasks, and use a thread-safe queue to communicate with them. I would also like to be doing IO to a variety of file descriptors while I'm waiting.
What's the recommended way to accomplish this? Do I have to created an inter-thread pipe and write to it when the queue g... |
I want to wait on both a file descriptor and a mutex, what's the recommended way to do this? | 36,855,042 | 3 | 21 | 10,042 | 0 | c++,python,linux,multithreading,event-driven | It seems nobody has mentioned this option yet:
Don't run select/poll/etc. in your "main thread". Start a dedicated secondary thread which does the I/O and pushes notifications into your thread-safe queue (the same queue which your other threads use to communicate with the main thread) when I/O operations complete.
Then... | 0 | 1 | 0 | 0 | 2011-04-02T17:41:00.000 | 8 | 0.07486 | false | 5,524,780 | 0 | 0 | 0 | 3 | I would like to spawn off threads to perform certain tasks, and use a thread-safe queue to communicate with them. I would also like to be doing IO to a variety of file descriptors while I'm waiting.
What's the recommended way to accomplish this? Do I have to created an inter-thread pipe and write to it when the queue g... |
I want to wait on both a file descriptor and a mutex, what's the recommended way to do this? | 5,524,930 | 1 | 21 | 10,042 | 0 | c++,python,linux,multithreading,event-driven | C++11 has std::mutex and std::condition_variable. The two can be used to have one thread signal another when a certain condition is met. It sounds to me like you will need to build your solution out of these primitives. If you environment does not yet support these C++11 library features, you can find very similar o... | 0 | 1 | 0 | 0 | 2011-04-02T17:41:00.000 | 8 | 0.024995 | false | 5,524,780 | 0 | 0 | 0 | 3 | I would like to spawn off threads to perform certain tasks, and use a thread-safe queue to communicate with them. I would also like to be doing IO to a variety of file descriptors while I'm waiting.
What's the recommended way to accomplish this? Do I have to created an inter-thread pipe and write to it when the queue g... |
file I/O with google app engine | 5,525,121 | 1 | 1 | 278 | 0 | python,html,xml,google-app-engine,datastore | Use a StringIO when you need a file-like object for use with libraries that act on files. (Although I believe most XML parsers will happily accept a string instead of requiring a file-like object.) | 0 | 1 | 0 | 0 | 2011-04-02T18:17:00.000 | 1 | 1.2 | true | 5,524,991 | 0 | 0 | 1 | 1 | I want to provide a field in my html file so that people can upload their XML files to be imported to the datastore. How can I read and process this file inside the app engine once it is uploaded ? (I dont want to store the file with blobstore. Just want to read, process and throw it away) Thanks |
Is there a way to tell where your python file is? | 5,525,559 | 1 | 1 | 226 | 0 | python,windows,python-3.x,python-2.7 | You can read the variable __file__ to find out the path to the current Python file being interpreted. | 0 | 1 | 0 | 0 | 2011-04-02T20:04:00.000 | 5 | 0.039979 | false | 5,525,544 | 1 | 0 | 0 | 1 | (Python2.7-3.2 on WindowsXP)
I used to use sys.arg[0], but now I'm executing it from a batch script(for determining if the user has python)
Thanks ^^
~ps: Suggest if you know a better way to find out if the user has Python |
python sys.argv limitations? | 5,533,719 | 3 | 13 | 11,527 | 0 | python | Python itself doesn't impose any limitations on the length or content of sys.argv. However, your operating system and/or command shell definitely will. This question cannot be completely answered without detailed consideration of your operating environment. | 0 | 1 | 0 | 1 | 2011-04-04T01:18:00.000 | 2 | 0.291313 | false | 5,533,704 | 1 | 0 | 0 | 1 | Suppose I'd like to run a python script like this: python my_script.py MY_INPUT.
In this case, MY_INPUT will be transmitted to sys.argv[1].
Is there a limit to the number of characters MY_INPUT can contain?
Is there a limit to the type of characters MY_INPUT can contain?
Any other limitations with regards to MY_INPUT... |
python: Can I run a python script without actually installing python? | 29,426,136 | 0 | 32 | 72,897 | 0 | python,executable,py2exe,cx-freeze | This is an old question, but one alternative is creating a virtual environment for Python, which can be as simple as python -m venv myenvname (Python 3.4). You can "install" packages into it the normal way (e.g. pip) without needing anything else. You'll end up with a folder you can move/delete at your leisure. | 0 | 1 | 0 | 0 | 2011-04-04T14:13:00.000 | 6 | 0 | false | 5,539,736 | 1 | 0 | 0 | 1 | I have some .py files I wrote that I want to run on a different machine. The target machine does not have python installed, and I can't 'install' it by policy. What I can do is copy files over, run my stuff, and then remove them.
What I tried was to just take my development python folder over to the target machine an... |
Fastest Way to Write Data To Individual Machines? | 5,541,728 | 3 | 0 | 179 | 0 | python,linux | You have two (classes of) choices:
You could build some distribution mechanism yourself.
You could use an existing tool to handle the distribution and storage.
In the simplest case, you write a program on each machine in your network that simply listens, processes and writes. You distribute from X to each machine in ... | 0 | 1 | 0 | 0 | 2011-04-04T16:43:00.000 | 3 | 1.2 | true | 5,541,615 | 0 | 0 | 0 | 1 | I have a network of 100 machines, all running Ubuntu Linux.
On a continuous (streaming) basis, machine X is 'fed' with some real-time data. I need to write a python script that would get the data as input, load it in-memory, process it, and then save it to disk.
It's a lot of data, hence, I would ideally want to split ... |
Retrieve list of tasks in a queue in Celery | 50,170,855 | 2 | 188 | 188,607 | 0 | python,celery | As far as I know Celery does not give API for examining tasks that are waiting in the queue. This is broker-specific. If you use Redis as a broker for an example, then examining tasks that are waiting in the celery (default) queue is as simple as:
connect to the broker
list items in the celery list (LRANGE command for... | 0 | 1 | 0 | 0 | 2011-04-04T21:35:00.000 | 14 | 0.028564 | false | 5,544,629 | 0 | 0 | 1 | 1 | How can I retrieve a list of tasks in a queue that are yet to be processed? |
How to install PIL in system library using homebrew? | 36,866,806 | 1 | 12 | 19,221 | 0 | python-imaging-library,homebrew | As @BarnabasSzabolcs mentioned, newer versions named pillow.
an alternative to brew install Homebrew/python/pillow is pip install pillow. You may need to add sudo, depends on your python environment permissions.
p.s.
that answer could be fit better as a comment, 14 credits to go... | 0 | 1 | 0 | 0 | 2011-04-05T03:26:00.000 | 4 | 0.049958 | false | 5,546,860 | 1 | 0 | 0 | 1 | In a new SnowLeopard install, I'd like to use homebrew to install PIL. However the recipe installs PIL under cellar instead of in /Library/Python/2.6/site-packages. Is there a way to change the install directory? |
getting etag from 'google reader bundle' feed using universal feed parser in python | 5,554,213 | 0 | 0 | 203 | 0 | python,atom-feed,google-reader | The Google Reader API does not support ETags or If-Modified-Since. However, it does support an ot=<timestamp in seconds since the epoch> parameter which you can use to restrict fetched data to items since you last attempted a fetch. | 0 | 1 | 1 | 0 | 2011-04-05T12:46:00.000 | 1 | 1.2 | true | 5,552,049 | 0 | 0 | 0 | 1 | I am using the universal feed parser library in python to get an atom feed. This atom feed has been generated using google reader after bundling several subscriptions.
I am able to receive the latest feeds, however the feedparser.parse(url) returns a FeedParserDict which doesnot have the etag or modified values. I una... |
Differences between node.js and Tornado | 5,563,767 | 10 | 81 | 30,121 | 0 | javascript,python,comparison,node.js,tornado | node.js uses V8 which compiles into assembly code, tornado doesn't do that yet.
Other than that (which doesn't actually seem to make much difference to the speed), it's the ecosystem. Do you prefer the event model of JS, or the way Python works? Are you happier using Python or JS libraries? | 0 | 1 | 0 | 0 | 2011-04-06T05:06:00.000 | 5 | 1 | false | 5,561,701 | 1 | 0 | 0 | 3 | Besides the fact that node.js is written in JS and Tornado in Python, what are some of the differences between the two? They're both non-blocking asynchronous web servers, right? Why choose one over the other besides the language? |
Differences between node.js and Tornado | 9,171,990 | 3 | 81 | 30,121 | 0 | javascript,python,comparison,node.js,tornado | Nodejs also has a seamless integration / implementation of websockets called Socket.io. It handles browsers supporting sockets - events and also has backward polling compatibility for older browsers. It is quite quick on development requiring a notification framework or some similar event based programming. | 0 | 1 | 0 | 0 | 2011-04-06T05:06:00.000 | 5 | 0.119427 | false | 5,561,701 | 1 | 0 | 0 | 3 | Besides the fact that node.js is written in JS and Tornado in Python, what are some of the differences between the two? They're both non-blocking asynchronous web servers, right? Why choose one over the other besides the language? |
Differences between node.js and Tornado | 29,455,334 | 3 | 81 | 30,121 | 0 | javascript,python,comparison,node.js,tornado | I would suggested you go with NodeJS, if there is no personal pref to python. I like Python a lot, but for async I choose Tornado over node, and later had to struggle finding way to do a thing, or libraries with async support (like Cassandra has async in tests, but nowhere could I find way to use cqlengine with async. ... | 0 | 1 | 0 | 0 | 2011-04-06T05:06:00.000 | 5 | 0.119427 | false | 5,561,701 | 1 | 0 | 0 | 3 | Besides the fact that node.js is written in JS and Tornado in Python, what are some of the differences between the two? They're both non-blocking asynchronous web servers, right? Why choose one over the other besides the language? |
Changing versions of Python in command line | 5,568,374 | 5 | 6 | 3,806 | 0 | python,macos | You can simply type python3.2 instead of just python to use python 3.2. | 0 | 1 | 0 | 0 | 2011-04-06T14:48:00.000 | 1 | 1.2 | true | 5,568,330 | 1 | 0 | 0 | 1 | Python 2.5 came installed on my Mac. I downloaded Python 3.2 and have it running in my IDE. When I open the terminal in Mac and type in Python, it tells me I'm working with 2.5.
1) What do I enter in the command line to change from 2.5 to 3.2?
2) Once I get to 3.2 (using your answer), how do I get back to 2.5 if I wa... |
Saving the state of a program to allow it to be resumed | 48,079,154 | 1 | 11 | 20,357 | 0 | python,state | If you ok with OOP, consider creating a method for each class that output a serialised version ( using pickle ) to file. Then add a second method to load in the instance the data, and if the pickled file is there you call the load method instead of the processing one.
I use this approach for ML and it really seed up m... | 0 | 1 | 0 | 0 | 2011-04-06T15:27:00.000 | 4 | 0.049958 | false | 5,568,904 | 1 | 0 | 0 | 2 | I occasionally have Python programs that take a long time to run, and that I want to be able to save the state of and resume later. Does anyone have a clever way of saving the state either every x seconds, or when the program is exiting? |
Saving the state of a program to allow it to be resumed | 5,569,817 | 4 | 11 | 20,357 | 0 | python,state | If you want to save everything, including the entire namespace and the line of code currently executing to be restarted at any time, there is not a standard library module to do that.
As another poster said, the pickle module can save pretty much everything into a file and then load it again, but you would have to spec... | 0 | 1 | 0 | 0 | 2011-04-06T15:27:00.000 | 4 | 0.197375 | false | 5,568,904 | 1 | 0 | 0 | 2 | I occasionally have Python programs that take a long time to run, and that I want to be able to save the state of and resume later. Does anyone have a clever way of saving the state either every x seconds, or when the program is exiting? |
Effectively reading a large, active Python log file | 5,574,829 | 0 | 1 | 517 | 0 | python,windows,logging,text-files | As ʇsәɹoɈ commented, the standard FileHandler logger does not lock the file, so it should work. However, if for some reason you cannot keep you lock on the file - then I'd recommend having your other app open the file periodically, record the position it's read to and then seek back to that point later. I know the Linu... | 0 | 1 | 0 | 0 | 2011-04-06T18:13:00.000 | 2 | 1.2 | true | 5,571,035 | 1 | 0 | 0 | 1 | When my Python script is writing a large amount of logs to a text file line by line using the Python built-in logging library, in my Delphi-powered Windows program I want to effectively read all newly added logs (lines).
When the Python scripting is logging
to the file, my Windows program will
keep a readonly file han... |
OS independent printing with Python | 5,572,506 | 1 | 2 | 2,696 | 0 | python,pdf,printing,pygtk | Have you considered generating HTML? | 1 | 1 | 0 | 0 | 2011-04-06T20:22:00.000 | 3 | 0.066568 | false | 5,572,489 | 0 | 0 | 0 | 1 | I am developing an application which has to be able to print a couple of pages with Python. Now I am searching for a method to create these pages and print them. It should work on Linux and Windows. The pages contain tables, images and text.
I developed the GUI with PyGtk, but I think it's convenient to create an image... |
Help choosing between reload or subprocess | 5,592,323 | 1 | 3 | 146 | 0 | python,python-3.x | Reloading a module is rarely a good idea in a production environment; it's a mechanism intended for debugging. When you reload a module, the module's contents (classes, function, data) get replaced, but existing references to these items from other modules are not affected. This is particularly important for classes: e... | 0 | 1 | 0 | 0 | 2011-04-08T04:22:00.000 | 1 | 1.2 | true | 5,590,396 | 0 | 0 | 0 | 1 | Hello i want to know the best way to re import or re execute a module, because i have a web server with just one Apache session for all my domains and applications, and i if i need to make some changes on one application restart the server will affect the others, so looking for the best way to recall a module. If i cho... |
PyDev Eclipse Python interpreters Error: stdlib not found | 7,762,436 | 3 | 25 | 26,549 | 0 | python,eclipse,pydev | I too had the error: stdlib sources not found.
My fix was to install XCode 4.2 and then retry Eclipse's PyDev "Auto Config" method.
No error. PyDev running OK! | 0 | 1 | 0 | 0 | 2011-04-08T12:50:00.000 | 13 | 0.046121 | false | 5,595,276 | 1 | 0 | 0 | 7 | I have been trying to use Eclipse 3.6 as a Python editor.
I install the latest version of PyDev, and then try to set the Interpreter - Python field of the preferences, on my mac.
My python version is 2.6 and the path is "/usr/bin/python". When I enter this, and I select the items to add to the system PYTHONPATH I get ... |
PyDev Eclipse Python interpreters Error: stdlib not found | 18,840,306 | 1 | 25 | 26,549 | 0 | python,eclipse,pydev | In Preferences > PyDev > Interpreter - Python
Choose New...
Name it "Python2.7"
set the path to /usr/bin/python
it then auto-configs some paths, select them, and it proceeds. | 0 | 1 | 0 | 0 | 2011-04-08T12:50:00.000 | 13 | 0.015383 | false | 5,595,276 | 1 | 0 | 0 | 7 | I have been trying to use Eclipse 3.6 as a Python editor.
I install the latest version of PyDev, and then try to set the Interpreter - Python field of the preferences, on my mac.
My python version is 2.6 and the path is "/usr/bin/python". When I enter this, and I select the items to add to the system PYTHONPATH I get ... |
PyDev Eclipse Python interpreters Error: stdlib not found | 12,368,091 | 2 | 25 | 26,549 | 0 | python,eclipse,pydev | @labjunky , if the .py files from the lib folder in the source tar ball are dropped into the User's site-packages folder ~/Library/Python/2.7/lib/python/site-packages[ provided it is listed in the locations by PyDev and selected] , it works too. this can be useful if the user does not have permission to modify the loca... | 0 | 1 | 0 | 0 | 2011-04-08T12:50:00.000 | 13 | 0.03076 | false | 5,595,276 | 1 | 0 | 0 | 7 | I have been trying to use Eclipse 3.6 as a Python editor.
I install the latest version of PyDev, and then try to set the Interpreter - Python field of the preferences, on my mac.
My python version is 2.6 and the path is "/usr/bin/python". When I enter this, and I select the items to add to the system PYTHONPATH I get ... |
PyDev Eclipse Python interpreters Error: stdlib not found | 5,697,623 | 2 | 25 | 26,549 | 0 | python,eclipse,pydev | I found the solution of not touching macs deliverd python version, but downloading ad installing a new one (currently 3.something)
when setting up the interpreter, point to /usr/local/bin/pyhton3
(to find out the exact path open terminal and type: sudo -s !hittenter> your password !hittenter> cd /usr/local/bin !hi... | 0 | 1 | 0 | 0 | 2011-04-08T12:50:00.000 | 13 | 0.03076 | false | 5,595,276 | 1 | 0 | 0 | 7 | I have been trying to use Eclipse 3.6 as a Python editor.
I install the latest version of PyDev, and then try to set the Interpreter - Python field of the preferences, on my mac.
My python version is 2.6 and the path is "/usr/bin/python". When I enter this, and I select the items to add to the system PYTHONPATH I get ... |
PyDev Eclipse Python interpreters Error: stdlib not found | 70,013,286 | 0 | 25 | 26,549 | 0 | python,eclipse,pydev | I got this error because I downloaded the embedded zip file version of Python and extracted it to a folder. I then downloaded the actual installer and ran it. That gave me the stuff that I was missing. | 0 | 1 | 0 | 0 | 2011-04-08T12:50:00.000 | 13 | 0 | false | 5,595,276 | 1 | 0 | 0 | 7 | I have been trying to use Eclipse 3.6 as a Python editor.
I install the latest version of PyDev, and then try to set the Interpreter - Python field of the preferences, on my mac.
My python version is 2.6 and the path is "/usr/bin/python". When I enter this, and I select the items to add to the system PYTHONPATH I get ... |
PyDev Eclipse Python interpreters Error: stdlib not found | 13,389,249 | 7 | 25 | 26,549 | 0 | python,eclipse,pydev | When I upgraded to Mountain Lion (10.8.2) I had this problem. The solution was to install XCode 4.5.2, then in XCode > Preferences > Components, there is an option to install the Command Line Tools. I installed them and then I was able install Interpreter. | 0 | 1 | 0 | 0 | 2011-04-08T12:50:00.000 | 13 | 1 | false | 5,595,276 | 1 | 0 | 0 | 7 | I have been trying to use Eclipse 3.6 as a Python editor.
I install the latest version of PyDev, and then try to set the Interpreter - Python field of the preferences, on my mac.
My python version is 2.6 and the path is "/usr/bin/python". When I enter this, and I select the items to add to the system PYTHONPATH I get ... |
PyDev Eclipse Python interpreters Error: stdlib not found | 5,940,607 | 28 | 25 | 26,549 | 0 | python,eclipse,pydev | Had the same problem. Eclipse wouldn't find all the required path using the default installed python (2.6). I downloaded python 2.7, went through the install. My new "which python" path became:
/Library/Frameworks/Python.framework/Versions/2.7/bin/python.
When I tried to set up the interpreter this time, specified t... | 0 | 1 | 0 | 0 | 2011-04-08T12:50:00.000 | 13 | 1 | false | 5,595,276 | 1 | 0 | 0 | 7 | I have been trying to use Eclipse 3.6 as a Python editor.
I install the latest version of PyDev, and then try to set the Interpreter - Python field of the preferences, on my mac.
My python version is 2.6 and the path is "/usr/bin/python". When I enter this, and I select the items to add to the system PYTHONPATH I get ... |
distutils does not recompile C extension modules | 5,599,557 | 0 | 0 | 938 | 0 | python,distutils | Looking into the source for distutils and seeing how it enforces rebuilds it looks like it checks timestamps of files to determine whether a file is out of date or not.
Can you make sure the timestamp is changing when winscp is uploading the file? Otherwise it looks like the build command has a "force" option that forc... | 0 | 1 | 0 | 1 | 2011-04-08T18:39:00.000 | 1 | 1.2 | true | 5,599,414 | 0 | 0 | 0 | 1 | I'm trying to use distutils with a Python module that contains extensions written in C. The program code is housed on a Linux server, but I sometimes upload changes from a Windows machine using the file transfer program WinSCP (editing is done in Notepad++). I've noticed that distutils often does not notice these chang... |
Google-App Engine logging problem | 5,612,643 | 0 | 1 | 252 | 0 | python,django,google-app-engine | Thanks Abdul you made me realize what the problem is. I had changed a URL in my application to point to the application that I had deployed to Google-App Engine. It should have been pointing to my local application. I had myapp.appspot.com/move instead of localhost/move | 0 | 1 | 0 | 0 | 2011-04-10T14:24:00.000 | 2 | 1.2 | true | 5,612,390 | 0 | 0 | 1 | 1 | I'm wondering if anyone has experienced problems with Google-App Engine's logging facility. Everything was working fine for me until this morning, I ran my local server and no logging messages were being displayed (well, none of my logging messages, the server GET messages etc.. are being displayed). Even errors are no... |
Uninstall python 3.2 on mac os x 10.6.7 | 23,726,032 | 0 | 10 | 19,603 | 0 | macos,uninstallation,python-3.2 | just uninstall 3x version of python if you have already installed it. Eclipse has that option when you click "see whats already installed".
Install later 2.7 version. It works for me on my OS X 10.9.2 with Eclipse Juno. | 0 | 1 | 0 | 0 | 2011-04-11T13:20:00.000 | 3 | 0 | false | 5,621,952 | 1 | 0 | 0 | 2 | According to the documentation from python.org, python 3.2 install on mac os requires an upgrade to tcl/tk 8.5.9 (for use of IDLE). In my haste, I have done both. Now my friend told me that python 3 is not recommended yet because only the built-ins and a few modules have been released for 3. The stable one so far is 2.... |
Uninstall python 3.2 on mac os x 10.6.7 | 5,627,279 | 4 | 10 | 19,603 | 0 | macos,uninstallation,python-3.2 | I did the same (3.2 on a mac 10.6) and:
-Moved both the Python 3.2 folder and the ActiveState ActiveTcl folder from the Applications Folder to the Trash.
-Moved the Python.framework folder from the Library/Frameworks folder to the Trash.
Running System profiler shows only the 2.6 version of Python.
Marcos | 0 | 1 | 0 | 0 | 2011-04-11T13:20:00.000 | 3 | 0.26052 | false | 5,621,952 | 1 | 0 | 0 | 2 | According to the documentation from python.org, python 3.2 install on mac os requires an upgrade to tcl/tk 8.5.9 (for use of IDLE). In my haste, I have done both. Now my friend told me that python 3 is not recommended yet because only the built-ins and a few modules have been released for 3. The stable one so far is 2.... |
Celery - collision of task_ids | 5,647,566 | 0 | 1 | 304 | 0 | python,django,celery | It shouldn't be possible and even if, it should be very rare. My guess would be that the same task is executed a second time after your exception. Maybe there is a problem with your routing keys as the worker doesn't get the task? Or the broker has a problem, I've seen funny problems with RabbitMQ. Deleting it's databa... | 0 | 1 | 0 | 0 | 2011-04-13T08:54:00.000 | 1 | 0 | false | 5,646,679 | 0 | 0 | 1 | 1 | I'm getting HardTimeLimit exception for my tasks. After log examination i found -
task is not being received by celery ( No "Got task from broker:" message for task id)
task with the same id was executed couple a days ago.
Task ids are assigned automatically by @task decorator, tasks are started by django, there ar... |
Tracing windows API calls | 5,653,820 | 3 | 3 | 1,707 | 0 | .net,python,winapi,trace,etw | Generally speaking, there are two approaches to intercepting system API calls; either user mode or kernel mode interception. For user mode API interception, you will have to hook every process to accurately capture/redirect every call to your desired API function. Kernel mode interception circumvents the need to hook e... | 0 | 1 | 0 | 0 | 2011-04-13T17:04:00.000 | 1 | 1.2 | true | 5,652,908 | 1 | 0 | 0 | 1 | I am currently working on a tool in .NET/Python that monitors certain events on a system, like writing specific registry keys or creating files with a special name.
I evaluated many possibilities, and as I don't have to care about WinXP support, I am using Event Tracing for Windows to get a real-time stream of all file... |
Python distribution for Scientists on Linux | 5,660,288 | 5 | 1 | 10,929 | 0 | python,linux,distribution,pythonxy | For linux, you don't need something like PythonXY, because it's already very easy to install packages with your package manager. Things are actually a lot better integrated under linux than under windows.
What you need to do is pick a good linux distribution, and install the packages you like with the package manager (... | 0 | 1 | 0 | 0 | 2011-04-14T07:26:00.000 | 5 | 0.197375 | false | 5,659,931 | 0 | 0 | 0 | 1 | I would like to find out if there is a Pythonxy.com equivalent for Linux/Mac OS X yet?
any kind of pointers would be helpful?
Thanks and best regards,
Vishal Sapre |
Packaging and shipping a python library and scripts, the professional way | 5,733,166 | 3 | 37 | 8,155 | 0 | python | This will vary depending on your target market. In specialized niche industries there is more variety in how stuff is distributed. In heavily commoditized areas I would expect native OS package (at least if I were a customer). I tend to take the quality of the deployment package as indicative of the quality of the s... | 0 | 1 | 0 | 0 | 2011-04-14T09:49:00.000 | 9 | 0.066568 | false | 5,661,385 | 1 | 0 | 0 | 2 | I have the task of packaging and shipping a commercial application bundle, which will include:
a python library (developed by us)
some python programs depending on the library above
additional libraries not developed by us, but which are dependencies of our library.
a complete python installation (python 2.6)
addition... |
Packaging and shipping a python library and scripts, the professional way | 5,731,719 | 15 | 37 | 8,155 | 0 | python | This is not a complete answer but just a bunch of ideas. I wrote an installer for a client that incorporated some ideas that might be useful to you.
It was Linux only so I focussed on just that. We needed to ship specific custom versions of mySQL, lighttpd, python, memcached, a few 3rd party Python modules and some cu... | 0 | 1 | 0 | 0 | 2011-04-14T09:49:00.000 | 9 | 1.2 | true | 5,661,385 | 1 | 0 | 0 | 2 | I have the task of packaging and shipping a commercial application bundle, which will include:
a python library (developed by us)
some python programs depending on the library above
additional libraries not developed by us, but which are dependencies of our library.
a complete python installation (python 2.6)
addition... |
IronPython IDE for Ubuntu and Linux | 5,667,841 | 1 | 2 | 2,128 | 0 | linux,ide,ironpython,monodevelop,pydev | I don't know about Eclipse, but there isn't currently an IronPython addin for MonoDevelop. If anyone's interested in developing one, please contact the MonoDevelop mailing list for advice on getting started. | 0 | 1 | 0 | 1 | 2011-04-14T14:08:00.000 | 3 | 0.066568 | false | 5,664,513 | 0 | 0 | 0 | 2 | I've been searching for an IDE with code completion (intellisence) for IronPython on Linux systems (typically Ubuntu).
I've found references to MonoDevelop and Eclipse (PyDev) supporting IronPython, but I can't get any of them to work.
Is this because MonoDevelop and PyDev only support IronPython code completion on Win... |
IronPython IDE for Ubuntu and Linux | 5,883,279 | 2 | 2 | 2,128 | 0 | linux,ide,ironpython,monodevelop,pydev | Try JetBrains PyCharm | 0 | 1 | 0 | 1 | 2011-04-14T14:08:00.000 | 3 | 0.132549 | false | 5,664,513 | 0 | 0 | 0 | 2 | I've been searching for an IDE with code completion (intellisence) for IronPython on Linux systems (typically Ubuntu).
I've found references to MonoDevelop and Eclipse (PyDev) supporting IronPython, but I can't get any of them to work.
Is this because MonoDevelop and PyDev only support IronPython code completion on Win... |
Can beagleboard run python or Ruby programs? | 6,601,437 | 1 | 3 | 3,513 | 0 | python,ruby,beagleboard | The interpreters do not need to be compiled from source, as the Ubuntu arm distribution has python in its repository as a deb. I was able to write my python scripts on my Ubuntu box and transfer them to the beagleboard without any changes. Performance so far has been surprisingly good, as I'm using the python script ... | 0 | 1 | 0 | 1 | 2011-04-14T21:14:00.000 | 4 | 0.049958 | false | 5,669,785 | 0 | 0 | 0 | 3 | I hi have just ordered a couple of beaglboards for experimenting. I know that it can rub Ubuntu and many other flavors of linux.
Does that mean it can run all the trivial software that run on Ubuntu?
Will the python and ruby interpreters work just the way they work on PC ? |
Can beagleboard run python or Ruby programs? | 5,669,819 | 4 | 3 | 3,513 | 0 | python,ruby,beagleboard | The Beagleboard can run both of them, but you may have to compile the interpreters from source. And don't expect the performance of a desktop. | 0 | 1 | 0 | 1 | 2011-04-14T21:14:00.000 | 4 | 1.2 | true | 5,669,785 | 0 | 0 | 0 | 3 | I hi have just ordered a couple of beaglboards for experimenting. I know that it can rub Ubuntu and many other flavors of linux.
Does that mean it can run all the trivial software that run on Ubuntu?
Will the python and ruby interpreters work just the way they work on PC ? |
Can beagleboard run python or Ruby programs? | 8,717,516 | 1 | 3 | 3,513 | 0 | python,ruby,beagleboard | The Angstrom Linux distribution (which runs on the Beagle Board) has binary packages for both Python and Ruby. I've worked on an application that uses Python and PyGTK. Never had any problems. | 0 | 1 | 0 | 1 | 2011-04-14T21:14:00.000 | 4 | 0.049958 | false | 5,669,785 | 0 | 0 | 0 | 3 | I hi have just ordered a couple of beaglboards for experimenting. I know that it can rub Ubuntu and many other flavors of linux.
Does that mean it can run all the trivial software that run on Ubuntu?
Will the python and ruby interpreters work just the way they work on PC ? |
Task Scheduling Across a Network? | 5,672,196 | 2 | 3 | 1,351 | 0 | python,scheduled-tasks,distributed-computing | Fabric (http://docs.fabfile.org/en/1.0.1/index.html) is a pretty good toolkit for various sys admin and deployment tasks. It comes with a few pre defined tasks but also gives you the flexibility to add what you need.
I highly recommend it. | 0 | 1 | 0 | 0 | 2011-04-15T01:30:00.000 | 3 | 0.132549 | false | 5,671,527 | 0 | 0 | 0 | 1 | Can you recommend on a python tool / module that allows scheduling tasks on remote machine in a network?
Note that the solution must be able to not only run certain jobs/commands on remote machines, but also verify that jobs etc are still running (for example, consider the case where a machine dies after a task has be... |
Why re-implement shell commands line by line in a Fabric script? | 8,855,653 | 2 | 4 | 1,058 | 0 | python,shell,deployment,fabric | Also, I think the path you'd choose would depend on what you're trying to do. Some things are easier in python (write it in your fabfile), while others are easier in shell-land (take one of the shell approaches mentioned).
Either way, fabric is geared towards centralization and portability, and it doesn't really matter... | 0 | 1 | 0 | 1 | 2011-04-15T06:31:00.000 | 3 | 0.132549 | false | 5,673,154 | 0 | 0 | 0 | 3 | Fabric is a tool for "executing local or remote shell commands."
Why would you re-implement a remote shell script line by line in a long Fabric script?
That is, why not just write a brief Fabric script that runs a long remote shell script instead? |
Why re-implement shell commands line by line in a Fabric script? | 5,674,298 | 4 | 4 | 1,058 | 0 | python,shell,deployment,fabric | It wont be a good idea if I have to run the same script on, lets say, 10 servers. This means I've to not only stick the same long script on 10 servers, but also make sure if I change it on 1 server, the change has to be applied to all servers. I know this can be averted by keeping that script on a shared location, but ... | 0 | 1 | 0 | 1 | 2011-04-15T06:31:00.000 | 3 | 0.26052 | false | 5,673,154 | 0 | 0 | 0 | 3 | Fabric is a tool for "executing local or remote shell commands."
Why would you re-implement a remote shell script line by line in a long Fabric script?
That is, why not just write a brief Fabric script that runs a long remote shell script instead? |
Why re-implement shell commands line by line in a Fabric script? | 5,676,599 | 4 | 4 | 1,058 | 0 | python,shell,deployment,fabric | lobster1234 raises a good point that you don't want to have to manually stick a long, remote shell script on 10 servers. However, if you still want to avoid rewriting the long, remote shell script as a long Fabric script, you could write a Fabric script that copies that remote shell script to the designated server, exe... | 0 | 1 | 0 | 1 | 2011-04-15T06:31:00.000 | 3 | 1.2 | true | 5,673,154 | 0 | 0 | 0 | 3 | Fabric is a tool for "executing local or remote shell commands."
Why would you re-implement a remote shell script line by line in a long Fabric script?
That is, why not just write a brief Fabric script that runs a long remote shell script instead? |
Example of using Chef with LibCloud | 10,241,015 | 2 | 0 | 739 | 0 | python,deployment,chef-infra | I use chef to bootstrap ec2 instances. I also use boto to do further modifications of ec2 instances such as creating tags etc. I will be now be using libcloud more often since I will I will have a mix between rackspace and ec2.
As a side, when bootstrap a ec2 or rackspace instance, I do not use knife, I use libcload ... | 0 | 1 | 0 | 1 | 2011-04-15T07:22:00.000 | 2 | 0.197375 | false | 5,673,599 | 0 | 0 | 0 | 2 | Chef is commonly used for provisioning servers, right? So is LibCloud, right?
What's an example use case of why someone would use both tools together? |
Example of using Chef with LibCloud | 5,919,135 | 0 | 0 | 739 | 0 | python,deployment,chef-infra | Chef works with a variety of cloud computing providers:
Amazon AWS EC2
Rackspace Cloud
Terremark vCloud
Bluebox Group
Openstack
Slicehost
It does this through the Ruby library, fog. | 0 | 1 | 0 | 1 | 2011-04-15T07:22:00.000 | 2 | 0 | false | 5,673,599 | 0 | 0 | 0 | 2 | Chef is commonly used for provisioning servers, right? So is LibCloud, right?
What's an example use case of why someone would use both tools together? |
python how to force subprocess.call to not wait for the called command to complete | 5,677,732 | 9 | 4 | 1,923 | 0 | python,subprocess | subprocess.Popen is what you are looking for! | 0 | 1 | 0 | 0 | 2011-04-15T13:18:00.000 | 1 | 1.2 | true | 5,677,391 | 0 | 0 | 0 | 1 | Im using subprocess.call to execute a bat file. subprocess.call is waiting for the bat file to complete before it continues. I want it to start the bat then continue on. Looking at the documents for subprocess it didnt look like it had an option to not wait for the command to complete.
Is there a way to do this or a... |
Python scripting in linux | 5,680,308 | 0 | 1 | 304 | 0 | python,django,linux,fabric | You could also try any of the distributed computing packages. Pyro is one of them that might interest you. | 0 | 1 | 0 | 1 | 2011-04-15T15:44:00.000 | 2 | 0 | false | 5,679,203 | 0 | 0 | 0 | 1 | We have around 250 identical linux server which runs a business critical web application for a bank. Basically we do a lot of scripting work but now i want to centralize that only in one location. That means run on one server and and deploy it in many. I know you guys must be thinking that this is an easy task and can ... |
Hadoop Vs. Disco Vs. Condor? | 5,682,297 | 3 | 4 | 1,606 | 0 | python,distributed-computing | I'm unfamiliar with Disco and Condor, but I can answer regarding Hadoop:
Hadoop pros:
Robust and proven - probably more than anything else out there. Used by many organizations (including the one I work for) to run clusters of 100s of nodes and more.
Large ecosystem = support + many subprojects to make life easier (e... | 0 | 1 | 0 | 0 | 2011-04-15T20:43:00.000 | 2 | 1.2 | true | 5,682,175 | 0 | 1 | 0 | 1 | I am trying to find a tool that will manage a bunch of jobs on 100 machines in a cluster (submit the jobs to the machines; make sure that jobs are run etc).
Which tool would be more simple to install / manage:
(1) Hadoop?
(2) Disco?
(3) Condor?
Ideally, I am searching for a solution that would be as simple as possible,... |
Detect socket hangup without sending or receiving? | 8,434,845 | 18 | 27 | 35,496 | 0 | python,c,linux,sockets,tcp | I've had a recurring problem communicating with equipment that had separate TCP links for send and receive. The basic problem is that the TCP stack doesn't generally tell you a socket is closed when you're just trying to read - you have to try and write to get told the other end of the link was dropped. Partly, that ... | 0 | 1 | 1 | 0 | 2011-04-16T12:32:00.000 | 7 | 1.2 | true | 5,686,490 | 0 | 0 | 0 | 2 | I'm writing a TCP server that can take 15 seconds or more to begin generating the body of a response to certain requests. Some clients like to close the connection at their end if the response takes more than a few seconds to complete.
Since generating the response is very CPU-intensive, I'd prefer to halt the task th... |
Detect socket hangup without sending or receiving? | 8,386,973 | -1 | 27 | 35,496 | 0 | python,c,linux,sockets,tcp | You can select with a timeout of zero, and read with the MSG_PEEK flag.
I think you really should explain what you precisely mean by "not reading", and why the other answer are not satisfying. | 0 | 1 | 1 | 0 | 2011-04-16T12:32:00.000 | 7 | -0.028564 | false | 5,686,490 | 0 | 0 | 0 | 2 | I'm writing a TCP server that can take 15 seconds or more to begin generating the body of a response to certain requests. Some clients like to close the connection at their end if the response takes more than a few seconds to complete.
Since generating the response is very CPU-intensive, I'd prefer to halt the task th... |
Google App Engine: How to get the offset of an object | 5,691,077 | 2 | 0 | 157 | 0 | python,database,google-app-engine | Why not query the data twice? Once for users with a higher score, in descending order. Once for users with a lower score. Fetch five records in each query. | 0 | 1 | 0 | 0 | 2011-04-16T16:54:00.000 | 2 | 0.197375 | false | 5,688,079 | 0 | 0 | 1 | 1 | I am using Google App Engine in Python.
In My database, I have some Entity which contain score of user. So I wanted to make a page on the ranking of a particular user. To do that, I need to get the 5 user with the higher score than that user and 5 user with lower score than that user, and also the position of that part... |
how to read command output from serial device using python | 23,190,516 | 0 | 0 | 4,870 | 0 | python,serial-port | very first you need to get log-in into the device.
then you can run the specified command on that device.
note:command which you are going to run must be supported by that device.
Now after opening a serial port using open() you need to find the login prompt using Read() and then write the username using write(), same ... | 0 | 1 | 0 | 1 | 2011-04-17T00:22:00.000 | 2 | 0 | false | 5,690,599 | 0 | 0 | 0 | 1 | I have an embedded linux device and here's what I would like to do using python:
Get the device console over serial port. I can do it like this:
>>> ser = serial.Serial('/dev/ttyUSB-17', 115200, timeout=1)
Now I want to run a tail command on the embedded device command line, like this:
# tail -f /var/log/messages
and... |
Analyze logfile from GAE | 5,699,117 | 1 | 0 | 220 | 0 | python,google-app-engine | I suggest you use Google Analytics on your web app. If you want to do some sort of server-side visitor analaytics (instead of the client-side Javascript that Google Analytics uses), you'd have to store something in a database (BigTable on GAE) and run your own analytics. | 0 | 1 | 0 | 0 | 2011-04-18T06:02:00.000 | 2 | 1.2 | true | 5,699,092 | 0 | 0 | 1 | 1 | Hi My app had visitors and I like to analyze the log file. Can I run a log analyzer program on the log file that google app engine allows us to download? Are third-party programs such as webalizer and visitors compatible?
Thank you |
How to Detect in Sub Process When Parent Process Has Died? | 5,705,904 | 5 | 6 | 1,656 | 0 | python,subprocess,orphan | You can use socketpair() to create a pair of unix domain sockets before creating the subprocess. Have the parent have one end open, and the child the other end open. When the parent exits, it's end of the socket will shut down. Then the child will know it exited because it can select()/poll() for read events from it... | 0 | 1 | 0 | 0 | 2011-04-18T16:02:00.000 | 2 | 1.2 | true | 5,705,659 | 0 | 0 | 0 | 1 | In python, I have a parent process that spawns a handful of child processes. I've run into a situation where, due to an unhandled exception, the parent process was dieing and the child processes where left orphaned. How do I get the child processes to recognize that they've lost their parent?
I tried some code that hoo... |
Changing password, python, linux | 5,706,671 | 2 | 1 | 4,855 | 0 | python,linux,change-password | You can modify /etc/passwd (/etc/shadow) with Python script which will need root permissions sudo python modify.py /etc/passwd (where modify.py is your script that will change password) | 0 | 1 | 0 | 1 | 2011-04-18T17:31:00.000 | 3 | 0.132549 | false | 5,706,597 | 0 | 0 | 0 | 1 | How can i change password of ubuntu root user by python script? Thanks. |
How do I set remote server TimeZone via Fabric? | 5,712,086 | 1 | 4 | 733 | 0 | python,bash,fabric | This only works for the current shell. Close the shell, start a new one and type date, you will see that the TZ has reset to the default timezone. Even for Fabric if you capture the output, you'd see that the TimeZone does get set correctly but as the script ends, so does the shell and hence the TZ variable is no longe... | 0 | 1 | 0 | 1 | 2011-04-19T05:39:00.000 | 3 | 0.066568 | false | 5,712,062 | 0 | 0 | 0 | 1 | I'm trying to change my remote server's timezone via Fabric like so:
run("export TZ=\":Pacific/Auckland\"")
run("date")
This doesn't seem to work. run("date") gives me:
Tue Apr 19 00:19:58 CDT 2011 which is not the timezone I just set.
If I just log into the server and run the same bash commands, everything's just as... |
Install script for C project with Python API | 5,727,575 | 0 | 4 | 146 | 0 | python,c,linux,unix,makefile | I would separate the project out into two parts. Your C part can use make as usual. Your python module can use the python setup tools, which are capable of building extensions.
(You can also write install targets, so you don't have to copy things manually) | 0 | 1 | 0 | 1 | 2011-04-19T16:19:00.000 | 2 | 0 | false | 5,719,506 | 0 | 0 | 0 | 1 | I have a project which is mostly written in C, but it also has a Python API which uses Python extension modules written in C.
What is the best way to write installation/deployment scripts for a Linux/UNIX environment? Usually, I use the make utility to compile and install projects written in C. Most of the time, I ju... |
Setting up a Python development environment on Windows | 5,722,080 | 2 | 1 | 694 | 0 | python,windows,development-environment | To make python executable on your command line, you need to add it to your PATH environment variable, which it sounds like you have done on the command line. It is quite simple to add directories to the PATH in Windows if you know where to look. Essentially, you need to get to the Environment Variables dialog box, whic... | 0 | 1 | 0 | 1 | 2011-04-19T19:58:00.000 | 2 | 0.197375 | false | 5,721,948 | 1 | 0 | 0 | 1 | Yes, I've searched. So after spending about 4-5 hours struggling just to get Python files running, I recently stumbled over the solution to get it running through the environment variables like this: cmd -> python -> Python starts, yay yay
Since it didn't work to do it through the command line and similar I had to do i... |
Is There a Way to Autogenerate Dependencies Tree in Makefile? | 5,723,765 | -3 | 2 | 2,038 | 0 | python,c,makefile,compilation | One way to simplify the build is skip dependencies. Just recompile everything every time. Only if the build has to be done many times, or it takes a "long time", the definition of which depends on the use, and the dependencies change a lot, does it make sense to do a detailed dependency build. | 0 | 1 | 0 | 0 | 2011-04-19T22:55:00.000 | 2 | -0.291313 | false | 5,723,719 | 0 | 0 | 0 | 1 | Abstract question:
I'm programming a mid-size C++/C program that's highly modularized. It has a common interface, which allows you to drop in a number of different sources with the same function declarations, but different implementations and get executables with different functionalities.
I'm working out a make syste... |
Automate WordPress Install from python | 5,732,608 | 0 | 3 | 1,206 | 0 | python,wordpress | Urllib is an option, but because your script is running on the local machine anyway, I would probably use os.system. That way you can execute the php script like from a shell. You have to look into the php file on how to pass the parameters. | 0 | 1 | 0 | 1 | 2011-04-20T14:56:00.000 | 2 | 0 | false | 5,732,384 | 0 | 0 | 1 | 2 | I have a python program that sets up a wordpress site on my server. It downloads the zip and unzips it into a directory, sets up the database and user, configures the config file. Now I would like to call the the wp_install function in wp-admin/include/upgrade.php and pass it the parameters it needs $weblog_title, $use... |
Automate WordPress Install from python | 5,732,698 | 1 | 3 | 1,206 | 0 | python,wordpress | It looks like wp_install() gets called inside of /wp-admin/install.php during step 1, and after form data has been validated. If you submit ?step=1& ... (all of the other required form fields) it should result in calling wp_install. So yes, you should be able to use urllib(2) for this. | 0 | 1 | 0 | 1 | 2011-04-20T14:56:00.000 | 2 | 0.099668 | false | 5,732,384 | 0 | 0 | 1 | 2 | I have a python program that sets up a wordpress site on my server. It downloads the zip and unzips it into a directory, sets up the database and user, configures the config file. Now I would like to call the the wp_install function in wp-admin/include/upgrade.php and pass it the parameters it needs $weblog_title, $use... |
Best practice for bundling third party libraries for distribution in Python 3 | 5,747,306 | 1 | 8 | 2,662 | 0 | python-3.x,dependencies,software-distribution | There are no best practices, but there are a few different tracks people follow. With regard to commercial product distribution there are the following:
Manage Your Own Package Server
With regard to your development process, it is typical to either have your dev boxes update from a local package server. That allows y... | 0 | 1 | 0 | 0 | 2011-04-21T15:24:00.000 | 3 | 1.2 | true | 5,746,231 | 1 | 0 | 0 | 1 | I'm developing an application using Python 3. What is the best practice to use third party libraries for development process and end-user distribution? Note that I'm working within these constraints:
Developers in the team should have the exact same version of the libraries.
An ideal solution would work on both Wind... |
How do I change the default Python version in my Mac Snow Leopard? | 5,752,844 | 1 | 3 | 15,524 | 0 | python,macos | Try the following: defaults write com.apple.versioner.python Version 3.2 in a terminal. Assuming you have 3.2 installed of course.
EDIT: As Neil Deily points out in his comment this only works with Python distributions shipped by Apple. | 0 | 1 | 0 | 0 | 2011-04-22T06:12:00.000 | 5 | 0.039979 | false | 5,752,753 | 1 | 0 | 0 | 2 | How do I change the default Python version used in my Mac Snow Leopard? I'm trying to switch from v2.5 to v3.0 |
How do I change the default Python version in my Mac Snow Leopard? | 5,752,849 | 0 | 3 | 15,524 | 0 | python,macos | I would first install Xcode on my machine (it comes on the installation disc that came with your computer). Then run Software Update to bring it up to date (at least to the most-current free version).
Then, download the Python 3.x source code and extract it. Do "./configure", "make" and "sudo make install" in that dir... | 0 | 1 | 0 | 0 | 2011-04-22T06:12:00.000 | 5 | 0 | false | 5,752,753 | 1 | 0 | 0 | 2 | How do I change the default Python version used in my Mac Snow Leopard? I'm trying to switch from v2.5 to v3.0 |
Capture google app engine logging output | 5,758,949 | 5 | 3 | 1,164 | 0 | python,google-app-engine,logging | The default logger sends logging output to stderr. Use your shell's method of redirecting stderr to a file (in tcsh, (dev_appserver.py > /dev/tty) >& your_logfile.txt, your shell may vary.)
You can also use the logging module in python to change the logger to send directly to a file if you detect it's running locally (... | 0 | 1 | 0 | 0 | 2011-04-22T17:07:00.000 | 2 | 1.2 | true | 5,757,945 | 0 | 0 | 1 | 1 | How can one view the Google App Engine logs outside the Admin console?
I'm developing, so using dev_appserver.py/the Admin Console and would like to see the logs as the records are emitted.
I'd like to monitor the logging output in a console with standard Unix tools e.g. less/grep/etc, but there doesn't seem to be an o... |
Recommended tools for web development with python under linux? | 5,758,465 | 0 | 0 | 1,598 | 0 | python,linux | You're going to have a lot more problems than your choice of framework if this is your first project on a UNIX. I'd recommend you find a clued in person at your workplace who knows the platform fairly well and use her as a teacher rather than rely completely on the web. | 0 | 1 | 0 | 0 | 2011-04-22T17:53:00.000 | 5 | 0 | false | 5,758,354 | 1 | 0 | 0 | 1 | I'm planning to work on a project using Tornado / nginx / mySQL / jQuery and would be using linux (im new to linux too, i barely know what vim / emacs are). Which tools for web development with this stack would you recommend? |
using emacs CEDET completion for python | 5,770,424 | 8 | 10 | 2,830 | 0 | python,emacs,code-completion,cedet | CEDET support for each language is slightly different. In the case of python, the 1.0 release for CEDET hadn't been configured to convert a python import into a file-name. In addition, 'self' is similar to 'this' in c++, which needs to be added by completion logic since it isn't declared. These two features were ad... | 0 | 1 | 0 | 1 | 2011-04-23T20:46:00.000 | 1 | 1 | false | 5,766,832 | 0 | 0 | 0 | 1 | In default installation of cedet-1.0 completion can only track global scope symbols in current file. This is not much differs from built-in completion functions (dabbrev-expand or hippie-expand).
It can complete symbols from neither imported modules, nor class properties.
Not saying it cannot handle 'self'.
Is it possi... |
Read/Write files in Python | 5,780,048 | 0 | 11 | 4,572 | 0 | python,file,file-io,permissions | Make sure you have permissions to change the file. Who is the owner of the file? Is it the one who runs the Python script? All these have to be taken into account. | 0 | 1 | 0 | 0 | 2011-04-25T15:30:00.000 | 2 | 0 | false | 5,779,989 | 0 | 0 | 0 | 1 | I need to make a file readable and writable in python. Currently the file is read-only. I am running on a Windows machine. I run the following code:
os.chmod(projectPath, stat.S_IWRITE | stat.S_IREAD)
on a file that needs to be read/write. But when I try to execute the file that needs to be read write, I get the fo... |
Terminal display broken after killing python curses program | 30,829,405 | 1 | 3 | 4,010 | 0 | python,curses | I think you should use curses.endwin(). It restores the terminal window...
In fact if you don't call it after program is closed terminal will show everything like it is in the curses window... | 0 | 1 | 0 | 0 | 2011-04-26T03:45:00.000 | 5 | 0.039979 | false | 5,785,669 | 0 | 0 | 0 | 2 | I wrote a small program in python and outputted some screen display using the curses library. For my simple output this seems to work. I run my python program from the command line.
My problem is that if I kill the python program the terminal doesn't properly display. For example:
'ls -al' displays properly bef... |
Terminal display broken after killing python curses program | 5,785,673 | 7 | 3 | 4,010 | 0 | python,curses | Usually the reset command will reset your terminal settings to default values. | 0 | 1 | 0 | 0 | 2011-04-26T03:45:00.000 | 5 | 1.2 | true | 5,785,669 | 0 | 0 | 0 | 2 | I wrote a small program in python and outputted some screen display using the curses library. For my simple output this seems to work. I run my python program from the command line.
My problem is that if I kill the python program the terminal doesn't properly display. For example:
'ls -al' displays properly bef... |
Execute a file with arguments in Python shell | 33,261,131 | 1 | 74 | 186,617 | 0 | python,shell | Besides subprocess.call, you can also use subprocess.Popen. Like the following
subprocess.Popen(['./script', arg1, arg2]) | 0 | 1 | 0 | 0 | 2011-04-26T10:18:00.000 | 13 | 0.015383 | false | 5,788,891 | 1 | 0 | 0 | 1 | I would like to run a command in Python Shell to execute a file with an argument.
For example: execfile("abc.py") but how to add 2 arguments? |
desktop development language compiled binary or scripting language (windows)? | 5,789,728 | 0 | 2 | 525 | 0 | python,windows,delphi,lua,desktop-application | Does anyone use anything else for shrink wrap apps on windows? e.g. Java, python etc.
Yes. I assume you're not really asking about Java, since that is so wide-spread. I can count quite a few Java applications that I use, and I don't operate in the "Enterprise" environment.
There are tools that allow you to ship Python... | 0 | 1 | 0 | 0 | 2011-04-26T11:12:00.000 | 2 | 0 | false | 5,789,455 | 0 | 0 | 0 | 1 | Does anyone use a scripting language only solution to produce a binary (.exe) to produce a commercial desktop application for windows or mac? e.g. Java, python etc. If so how do you distribute your app and does using a scripting language cause any problems with the installation?
I'm asking about users that can download... |
Python IDLE not accepting quotes | 5,797,614 | 3 | 1 | 4,436 | 0 | python,keyboard,python-idle | IDLE uses Tkinter from the Python standard library to supply GUI functionality. Tkinter is an interface to the multi-platform Tk graphical interface, part of Tcl/Tk. Unfortunately, Aqua Tk on OS X does not currently support all of the standard text processing features on OS X.
This particular problem appears to be a... | 0 | 1 | 0 | 0 | 2011-04-26T22:07:00.000 | 2 | 1.2 | true | 5,797,046 | 0 | 0 | 0 | 1 | Disclaimer: I'm a noob.
I've installed Python 3.2 (r32:88452) and ActiveTcl 8.5.9.2 (build 294317) on my OSX 10.6. Both installed without any errors, and I've already managed to run a .PY through Terminal. It runs okay.
I run IDLE and it doesn't show any errors. But whenever I press the quote key ('), nothing happens. ... |
wingide feature | 5,817,554 | 1 | 1 | 62 | 0 | python,eclipse,wing-ide | Found the solution: ctrl+shift+o. | 0 | 1 | 0 | 0 | 2011-04-28T11:00:00.000 | 1 | 0.197375 | false | 5,817,519 | 0 | 0 | 0 | 1 | Does wingide have an eclipse-like open resource feature (ctrl+shift+r)? |
Python data passing | 5,832,407 | 0 | 0 | 568 | 0 | php,python | If you want things to be synchronous use a named socket(Amazing feature on Unix systems.)
If you want things to be asynchronous use pickle(there is a php version of it too.) | 0 | 1 | 0 | 1 | 2011-04-29T12:58:00.000 | 2 | 0 | false | 5,832,346 | 0 | 0 | 0 | 1 | I need exchange data between python daemon (cluster nods send data to this daemon) and php script (apache) which, is accessed by webbrowsers. What do you recommend as technology which could establish some connection between them. Both, python daemon and apache/php is on the same machine.
Thank you. |
IO within the Program Files Directory | 5,838,035 | 0 | 3 | 1,184 | 0 | python,windows-7,io,uac | You need to execute this program as administrator or an account you have granted permissions to if you want to write to the program files folder. If you run the executable as normal user you won't have access. | 0 | 1 | 0 | 0 | 2011-04-29T22:28:00.000 | 4 | 0 | false | 5,838,025 | 0 | 0 | 0 | 3 | I made a program that both gathers data from a .txt file by reading it, and writes data to a different .txt file. However, there is a problem. When I run the program in a normal directory It runs perfectly fine. A problem arises when I place it in the C:\Program Files directory. When I run it I get IOERROR: [Errno 13] ... |
IO within the Program Files Directory | 5,838,045 | 2 | 3 | 1,184 | 0 | python,windows-7,io,uac | The most likely cause of this is that the "Program Files" directories in Windows 7 require administrative privileges to create sub directories.
You could run python as an administrator (hold shift, right click python.exe, run as administrator), or write to a directory that is not Program Files. | 0 | 1 | 0 | 0 | 2011-04-29T22:28:00.000 | 4 | 0.099668 | false | 5,838,025 | 0 | 0 | 0 | 3 | I made a program that both gathers data from a .txt file by reading it, and writes data to a different .txt file. However, there is a problem. When I run the program in a normal directory It runs perfectly fine. A problem arises when I place it in the C:\Program Files directory. When I run it I get IOERROR: [Errno 13] ... |
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