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Python : I have a Django app which I want to be able to use in multiple instances . One model ( Listing ) can have a variable number of fields ( for the different instances ) but will then always have exactly those extra fields for the instance . I want these extra fields added through admin so I 've created models lik... | Display an unknown number of fields in Django template with field content of another record as the label |
Python : How to get full row of data for groupby relsult ? How the get the full row ? I tried filtering but df [ df.e == df.groupby ( ' a ' ) [ ' b ' ] .max ( ) ] but size is different : ( Original data : Groupby ( [ 1,7 ] ) [ 14 ] .max ( ) gives me the result but in grouped series as 1 and 7 as index I wanted the corr... | Groupby returning full row for max occurs |
Python : I 'm trying to add a few interactive things the to Django admin page via a simple RESTful api and Javascript . Should be simple , but I 'm facing a weird issue where every single one of my requests from javascript is returning a 403 authorization error . Note that this only applies to js . I can hit the url fr... | Django Rest framework replacing my currently authenticated user with AnonymousUser whenever I call it via ajax ? |
Python : I am trying to filter data from a dataframe which are less than a certain value . If there is no NaN then its working fine . But when there is a nan then it is ignoring the NaN value . I want to include all the time its does n't matter its less than or bigger than the comparing value . In the above result 5,6,... | Value filter in pandas dataframe keeping NaN |
Python : Suppose we have a string a = `` 01000111000011 '' with n=5 `` 1 '' s. The ith `` 1 '' , I would like to replace with the ith character in `` ORANGE '' .My result should look like : What could be the finest way to solve this problem in Python ? Is it possible to bind an index to each substitution ? Many thanks ... | Python : Replace ith occurence of x with ith element in list |
Python : I 'm trying to wrap a little handy piece of C++ code that is intended to generate video+audio on windows using VFW , the C++ library lives here and the descriptions says : Uses Video for Windows ( so it 's not portable ) . Handy if you want to quickly record a video somewhere and do n't feel like wading throug... | Bug writing audio using custom video writer library |
Python : I have a django 1.5 running on Google App Engine using the djangoappengine module for the stitching.Everything works fine , except that about a half of the calls to /_ah/queue/deferred raise the following import error : As you can see , the djangoappengine module sits inside the third_party directory , and thi... | /_ah/queue/deferred strange import error |
Python : I expected the terminate ( ) method to kill the two processes : Running the code gives : I was expecting : <code> import multiprocessingimport timedef foo ( ) : while True : time.sleep ( 1 ) def bar ( ) : while True : time.sleep ( 1 ) if __name__ == '__main__ ' : while True : p_foo = multiprocessing.Process ( ... | Why are the children failing to die ? |
Python : I am trying to accept tuple and list as object types in an __add__ method in Python . Please see the following code : The error I get when running it in the Python interpreter is : I simply can not figure our why this is n't working . This is homework for a college course and I have very little experience with... | Implementing Tuples and Lists in the isinstance Function in Python 2.7 |
Python : this is my code : mypy throw error : Argument 1 of `` __eq__ '' incompatible with supertype `` object '' . But if I remove __eq__ method , mypy wo n't complain it though compare is same as __eq__ , what should I do ? <code> class Person : def __init__ ( self , id ) : self.id = id def __eq__ ( self , other : 'P... | mypy : `` __eq__ '' incompatible with supertype `` object '' |
Python : I 'm writing a Python parser to learn Flex and Bison , and I 'm trying to find out why only the first of these programs is valid Python.a.py : produces no error.b.py : produces this error : and c.py : produces this error : I 'm using Python 2.6.5 ( r265:79063 , Apr 16 2010 , 13:09:56 ) [ GCC 4.4.3 ] on linux2 ... | Why do indented explicit line continuations not allow comments in Python ? |
Python : Using this small reproducible example , I 've so far been unable to generate a new integer array from 3 arrays that contains unique groupings across all three input arrays . The arrays are related to topographic properties : The idea is that the geographic contours are broken into 3 different properties using ... | Intersect multiple 2D np arrays for determining zones |
Python : Situation ( Note : The following situation is just exemplary . This question applys to anything that can evaluate to bool ) A default list should be used if the user does not provide a custom list : You can shorten this to : Now , as per https : //docs.python.org/2.7/reference/expressions.html # or ... The exp... | Is 'or ' used on the right-hand-side of an assignment pythonic ? |
Python : I have dataframe like this : i 'm trying to aggregate it like this : and it works but i also need to add grouped logins to row , to make row like this : I tried something like lambda x : x.ait [ 0 , 1 ] but it doesnt work <code> x = pd.DataFrame ( { 'audio ' : [ 'audio1 ' , 'audio1 ' , 'audio2 ' , 'audio2 ' , ... | Pandas group by result to columns |
Python : I have to take a string containing placeholders for later substitution , like : And turn that into : I came up with : That works , but it feels super clunky , and not at all `` idiomatic '' python . How would a well , idiomatic python solution look like ? Updates for clarification : the resulting strings are n... | How to turn % s into { 0 } , { 1 } ... less clunky ? |
Python : I undertook an interview last week in which I learnt a few things about python I did n't know about ( or rather realise how they could be used ) , first up and the content of this question is the use of or for the purposes of branch control . So , for example , if we run : Then if f ( ) evaluates to some true ... | Use of OR as branch control in FP |
Python : I have one dataframe df , with two columns : Script ( with text ) and SpeakerAnd I have the following list : L = [ ' a ' , ' b ' , ' c ' ] With the following code , I obtain this dataframe df2 : Which line can I add in my code to obtain , for each line of my dataframe df2 , a percentage value of all lines spok... | Calculate percentage of similar values in pandas dataframe |
Python : I 've updated django from 1.6 to 1.8.3 . I create test models in test setUp method in unit tests , something like thatAnd I have code in the application , which relies on the primary key == 1 . I 've noted , that sequences are n't actually reseted . In each next test the pk is greater , that in previous . This... | Django reset_sequences does n't work in LiveServerTestCase |
Python : I have a boolean matrix with 1.5E6 rows and 20E3 columns , similar to this example : Also , I have another matrix N ( 1.5E6 rows , 1 column ) : What I need to do , is to go through each column pair from matrix M ( 1 & 1 , 1 & 2 , 1 & 3 , 1 & N , 2 & 1 , 2 & 2 etc ) combined by the AND operator , and count how ... | Fastest way for boolean matrix computations |
Python : How could I split a string by comma which contains commas itself in Python ? Let 's say the string is : How do I make sure I only get four elements after splitting ? <code> object = `` '' '' { `` alert '' , `` Sorry , you are not allowed to do that now , try later '' , `` success '' , `` Welcome , user '' } ''... | Regex for splitting a string which contains commas |
Python : a simple example : run with error when do current_process in __del__ : if I change a variable name : it get the right result : and I tried many variable name , some ok , some error.Why different instance name , will cause multiprocessing module be None in __del__ ? <code> # ! /usr/bin/env python # -*- coding :... | Python strange multiprocessing with variable name |
Python : I would like to know if there is a way of writing the below module code without having to add another indentation level the whole module code.I am looking for something like this : Note , I do not want to throw an Exception , the import should pass normally . <code> # module codeif not condition : # rest of th... | Is it possible to end a python module import with something like a return ? |
Python : Many iterator `` functions '' in the __builtin__ module are actually implemented as types , even although the documentation talks about them as being `` functions '' . Take for instance enumerate . The documentation says that it is equivalent to : Which is exactly as I would have implemented it , of course . H... | Why are some python builtin `` functions '' actually types ? |
Python : I have written a python code for a newton method in 1D and want to use it to calculate the newton fractal for the function The basic python code I am using is this : My newton ( ) -function returns the number of iterations it needed to find an approximation xk such that |f ( xk ) | < 1e-10.I tested this code w... | newton fractal : mathoverflow error |
Python : Disclaimer : completely new to Python from a PHP backgroundOk I 'm using Python on Google App Engine with Google 's webapp framework.I have a function which I import as it contains things which need to be processed on each page.This works fine when I call it , but how can I make sure the app is killed off afte... | How can I kill off a Python web app on GAE early following a redirect ? |
Python : I was playing around with metaclasses in CPython 3.2.2 , and I noticed it is possible to end up with a class that is its own type : For our metaclass A , there does n't really seem to be much of a distinction between class and instance attributes : All this works the same ( apart from changing to __metaclass__... | Python - an object can be its own type ? |
Python : Is there a good way to find stretches of Trues in a numpy boolean array ? If I have an array like : Can I get an array of indices like : or any other appropriate way to store this information . I know this can be done with some complicated while loops , but I 'm looking for a better way . <code> x = numpy.arra... | find stretches of Trues in numpy array |
Python : I 've made this list ; each item is a string that contains commas ( in some cases ) and colon ( always ) : I would like to create a new list from the one above as follows : But I 'd like to know if/ how it 's possible to do so in a line or two of efficient code employing primarily Python 's higher order functi... | Using Python Higher Order Functions to Manipulate Lists |
Python : I am trying to syllabify devanagari wordsधर्मक्षेत्रे - > धर् मक् षेत् रेdharmakeshetre - > dhar mak shet reI get the result as : Which is partially correctI try another word कुरुक्षेत्र - > कु रुक् षेत् रेkurukshetre - > ku ruk she treThe result is obviously wrong.How do I extract the syllables effectively ? ... | Syllabification of Devanagari |
Python : Not sure how to title this question . I 've run into a few situations where I have a list of data , maybe annotated with some property , and I want to collect them into groups . For example , maybe I have a file like this : and I want to group each set of readings , splitting them on a condition ( in this case... | How to collect data from a list into groups based on condition ? |
Python : Minimal exampleI tried referencing the class namespace as well but that is n't working eitherAnd of course , this works as expectedI want to understand why this scope issue is happening then , if I am trying to do something insane understand the best way to do it otherwise . My feeling was that the first code ... | Python scoping issue with dictionary comprehension inside class level code |
Python : In python , I one had to swap values of 2 variables , all you need to do wasOne can look at it as if the two statements- ( x=y ) and ( y=x ) are executed in parallel and not one after another.Is there any way to achieve the same effect in c++ ? NOTE/EDIT : I am looking to extend this 'parallel effect ' ( if it... | Running statements in 'parallel ' |
Python : I have the following f-string I want to print out on the condition the variable is available : Which results in : So normally I 'd use a type specifier for float precision like this : Which would result in : But that messes with the if-statement in this case . Either it fails because : The if statement becomes... | How to apply float precision ( type specifier ) in a conditional f-string ? |
Python : I have an expression like thiswhich is entered into Sympy like this ( for the sake of a reproducible example in this question ) Eyeballing this expression , the first order Taylor approximation for any of the variables , e.g . k1 , around some nonzero value should be nonzero , but this codejust returns 0 . Thi... | Why does my Sympy code calculate the first order Taylor series approximation incorrectly ? |
Python : I 'm working with a mapping from values of a python dictionary into a numpy array like this : This offers the values referenced through the dict to reflect any changes made in the full array . I need the size of the groups within the dict to be flexible . However when a group is only a single element , such as... | Numpy - retaining the pointer when referencing a single element |
Python : I am trying to learn python and I landed on the with..asconstruct , that used like this : So as a learning strategy I tried to do the following : and I got this output : My question is then : why did print ( derived ) return a None object and not a Derived object ? <code> with open ( `` somefile.txt '' , 'rt '... | Trying to figure out how the 'with..as ' construct works in python |
Python : I have a ID terminatorand a .txt sample file to parseI generated Java and Python2 target and test each against sample file respectively . Java target can parse this file . But Python2 target ca n't . It throws token recognition error at : ' 均 ' . And I tested Python2 target against other valid inputs , all wor... | antlr4 python target can not recognize unicode |
Python : i am trying to implement my own version of a DailyLogFile but it looks like i miss a fundamental of Python subclassing process ... as i get this error : so i need to explicitly add and define others methods like Write and rotate method like this : while i thought it would be correctly inherit from the base mot... | Python : why a method from super class not seen ? |
Python : I have a list of dicts and would like to design a function to output a new dict which contains the sum for each unique key across all the dicts in the list.For the list : So far so good , this can be done with a counter : Which correctly returns : The trouble comes when the dicts in my list start to contain ne... | Python sum list of dicts by key with nested dicts |
Python : Assume we have the following simplified data : I want to enumerate columns with the same prefix . In this case the prefixes are Data , Text . So expected output would be : Note the enumerated columns.Attempted solution # 1 : Attempted solution # 2 : Question : Is there an easier solution to do this , I also lo... | Enumerate columns with same prefix |
Python : I am working on old text files with 2-digit years where the default century logic in dateutil.parser does n't seem to work well . For example , the attack on Pearl Harbor was not on dparser.parse ( `` 12/7/41 '' ) ( which returns 2041-12-7 ) . The buit-in century `` threshold '' to roll back into the 1900 's s... | customize dateutil.parser century inference logic |
Python : I was messing around while trying to figure out shallow and deep copying in Python , and noticed that while the identities of a copied set , list , or seemingly any mutable type are n't the same : For immutable types this is n't the case - it looks like a copy points to the same address in memory . This sort o... | I think immutable types like frozenset and tuple not actually copied . What is this called ? Does it have any implications ? |
Python : In python3 , when I try to execute the following lines : Why does python throw that in my opinion highly misleading TypeError : format ( ) argument after * must be a sequence , not map for this builtin function ? It makes it even more confusing to see that an explicit raise for other Exceptions is caught an pa... | Sometimes , map is a sequence , sometimes not ? |
Python : I am trying to reproduce the algorithm explained here in Python but I am facing some problems with a strange growth of some parameters.The following is my attempt . Observe that get_ang ( ) and get_acc ( ) return angular velocity and acceleration along [ x , y , z ] -axis in degrees/s ( but I convert this data... | Error state Kalman Filter from MATLAB to Python |
Python : A reoccurring pattern in my Python programming on GAE is getting some entity from the data store , then possibly changing that entity based on various conditions . In the end I need to .put ( ) the entity back to the data store to ensure that any changes that might have been made to it get saved . However ofte... | Elegant way to avoid .put ( ) on unchanged entities |
Python : I 'm OCRing some text from two different sources . They can each make mistakes in different places , where they wo n't recognize a letter/group of letters . If they do n't recognize something , it 's replaced with a ? . For example , if the word is Roflcopter , one source might return Ro ? copter , while anoth... | elegant way to match two wildcarded strings |
Python : Here is the code I am usingWhich is giving me the following error : I am hoping to 1 ) understand why this is happening , and 2 ) find a solution that allows me to pickle the object ( without removing the memoization ) . Ideally the solution would not change the call to pickle . Running python 3.6 with funcy==... | Cant Pickle memoized class instance |
Python : I am going through the examples mentioned here , and am looking at this example . I ran a sample example below on ipython , and the result is consistent , i.e. , `` % d '' is slower than `` % s '' : Both the code blocks are similar , and even the output of disassembler is same , so why is `` % s '' faster than... | Why is % s faster than % d for integer substitution in python ? |
Python : I see no difference in sub classing the models.manager object and overriding the get_query_set method or simply creating a new method in the sub class and using the method . For the reason being I have taken example from the django book ; With this I could use ; Person.women.all ( ) or Person.men.all ( ) to fe... | subclassing models.Manager |
Python : Is there an existing Emacs function that adds the symbol currently under the point to __all__ when editing Python code ? E.g. , say the cursor was on the first o in foo : If you did M-x python-add-to-all ( or whatever ) it would add 'foo ' to __all__.I did n't see one when I googled around , but , as always , ... | Emacs function to add symbol to __all__ in Python mode ? |
Python : I tried my attempt at finding the smallest number that is divisible by numbers from 1 to n , and now I 'm looking for advice on ways to further compact/make my solution more efficient . It would be pretty cool if there was an O ( 1 ) solution too . <code> def get_smallest_number ( n ) : `` '' '' returns the sm... | Fastest and most compact way to get the smallest number that is divisible by numbers from 1 to n |
Python : Given a path , e.g . I wish to remove the e.This is what I did : Any more elegant way to do it ? <code> file_path = ' a.b.c.d.e ' class_path = ( '. ' ) .join ( file_path.split ( ' . ' ) [ 0 : -1 ] ) | Remove a part of a path separated with dots |
Python : Here is my model : Essentially , what I want is is for other_model to be unique in this table . That means that if there is a record where other_model_one id is 123 , I should not allow another record to be created with other_model_two id as 123 . I can override clean I guess but I was wondering if django has ... | Is there a way to create a unique id over 2 fields ? |
Python : I 'm trying to achieve the behavior above . Read further if you care why or if the example is n't sufficient enough . Sorry for the sharp tongue , but most of my Stack Exchange questions get hostile questions back instead of answers.This question arises from requiring an admin to run my script , but the nature... | Can my Python script distinguish between if it was run as root or if it was run through sudo ? |
Python : The Python documentation about the is operator says : The operators is and is not test for object identity : x is y is true if and only if x and y are the same object . x is not y yields the inverse truth value.Let 's try that : The Python documentation also says : Due to automatic garbage-collection , free li... | Why is a method not identical to itself ? |
Python : I have a dataset that looks something like this : That is then being computed into this to create a kmeans cluster.What I want to do is to make those clusters relate to both time periods and keys.With the time periods -7 am to 10 am , and 4 pm to 6 pm , and 12 pm to 2 pm , with 6 pm to 12 am , 12 am to 7 am , ... | How to group a dataframe by 4 time periods and key |
Python : As I am sure you are well aware , python , as do most programming languages , comes with built-in exceptions . I have gone through the list , and can not deduce which would be appropriate . Of course I can make my own exception , but this is a fairly standard error that would be excepted.This is an error based... | Python which built in exception to use |
Python : If a = 15 and 152 is represented as a2 while 215 is represented as 2a then a number x has to be found such that8x = 8*x8I tried this naive Python codebut it is taking a huge amount of time to produce a correct result.How to optimize the code ? <code> > > > i = 0 > > > while ( i < =100000000000000000 ) : ... if... | Efficiently solving a letter/number problem in Python |
Python : I 've looked at several other SO questions ( and google 'd tons ) that are 'similar'-ish to this , but none of them seem to fit my question right.I am trying to make a non fixed length , unique text string , only containing characters in a string I specify . E.g . made up of capital and lower case a-zA-Z chara... | python unique string creation |
Python : I 'd like to know if its possible to use the * operator in a oneline if to achieve the following functionality : I thought I could just saybut it turns out this is the same as saying which does n't make any sense for *None . I tired enclosing the first option in parenthesis but this just throws SyntaxError : c... | Proper use of the * operator in a oneline if statement python |
Python : I am using jupyter-cadquery to visualize some 3D models made with CadQuery.When visualizing the models on a Jupyter notebook , everything works as expected.But when trying to embed the widget in an HTML document , it seems the camera , on load , is pointing to ( 0 , 0 , 0 ) , not as expected . Once you interac... | Embed widgets with jupyter-cadquery ( threejs ) : wrong position on load |
Python : I only have OOP programming experience in Java and have just started working on a project in Python and I 'm starting to realize Python makes me skeptical about a few things that are intuitive to me . So I have a few questions about OOP in Python.Scenario : I 'm writing a program that will send emails . For an... | Python OOP from a Java programmer 's perspective |
Python : I would like to have python logging output to be in form of tree corresponding to logger tree . Just look at example.Lets say we have a code : The output should be something like : I could write formatters for each of the log by hand , but it does n't solve the problem of inserting something like o < -- '' a.b... | Format log messages as a tree |
Python : Here 's a simple class created declaratively : And here 's a similar class , but it was defined by invoking the metaclass manually : I 'm interested to know whether they are indistinguishable . Is it possible to detect such a difference from the class object itself ? <code> class Person : def say_hello ( self ... | Detect if class was defined declarative or functional - possible ? |
Python : Given the example below , which is more pythonic ? Using function composition , lambdas , or ( now for ) something completely different ? I have to say that the lambdas seem to be more readable , but Guido himself seems to want to remove lambdas altogether - http : //www.artima.com/weblogs/viewpost.jsp ? threa... | What is more pythonic - function composition , lambdas , or something else ? |
Python : In KDE 5 ( Kubuntu 15.04 / Plasma 5.2 ) disabled Qt-Buttons ( Qt4 ) are indistinguishable from non-disabled buttons . This problem does not exist in KDE 4.14 as the following screen-shot shows : The program source for this dialog is written in Python with PyQt4 : How can I make disabled Buttons in KDE 5 recogn... | Disabled Qt-Buttons are not shown as disabled in Plasma 5.2 ( KDE 5 ) |
Python : I 'm trying to optimise an exponential objective function with GEKKO , but I do n't know if the selected solver is the best one for these kind of problems . Is the selected one a valid choice ? ? <code> import numpy as np'GEKKO MODELING'from gekko import GEKKOm = GEKKO ( ) m.options.SOLVER=1 # APOPT is an MINL... | What solver should I use if my objective function is an nonlinear ( also exponential explanation ) function ? Python GEKKO |
Python : I want to compare all CSV files kept on my local machine to files kept on a server . The folder structure is the same for both of them . I only want to do a data comparison and not metadata ( like time of creation , etc ) . I am using filecmp but it seems to perform metadata comparison . Is there a way to do w... | Compare CSV files content with filecmp and ignore metadata |
Python : I 've been subclassing tuple or using namedtuple blissfully for a few years , but now I have a use case where I need a class that can be used as a weak referent . And today I learned tuples do n't support weak references . Is there another way to create an immutable object in Python with a fixed set of attribu... | immutable objects in Python that can have weak references |
Python : I was solving problem 26 on Project Euler where I need to calculate the length of the recurring part of 1/n where n is all integers between 1 and 1000 , and see which number makes the longest recurring part . That meant that I needed my division done a lot more precisely . So I was playing around with my decim... | Why does increasing precision make this program faster ? |
Python : I stumbled upon this line of code in SciPy 's source , in the stats module : Is this return something other than 1.0 ? In other words , is there any value of x such that x == x holds False ? <code> return 1.0* ( x==x ) | Is x==x ever False in Python ? |
Python : I 'm getting the following error on the second refresh of a page : DetachedInstanceError : Instance is not bound to a Session ; attribute refresh operation can not proceedThe issue seems to be some sharing of cached data between requests . The thing is that it 's only supposed to be cached locally ( i.e . re-q... | Python ( Pyramid framework ) is persisting data between requests and I ca n't figure out why |
Python : I have a list of characters and list of indexesand I 'd like to get this in one operationI could do this but is there is a way to do it faster ? <code> myList = [ ' a ' , ' b ' , ' c ' , 'd ' ] toRemove = [ 0,2 ] myList = [ ' b ' , 'd ' ] toRemove.reverse ( ) for i in toRemove : myList.pop ( i ) | Concise way to remove elements from list by index in Python |
Python : Problem statementI 'm looking for an efficient way to generate full binary cartesian products ( tables with all combinations of True and False with a certain number of columns ) , filtered by certain exclusive conditions . For example , for three columns/bits n=3 wewould get the full tableThis is supposed to b... | Generate filtered binary cartesian products |
Python : Hi I am working on implementing a multi-classification model ( 5 classes ) with the new SpaCy Model en_pytt_bertbaseuncased_lg . The code for the new pipe is here : The code for the training is as follows and is based on the example from here ( https : //pypi.org/project/spacy-pytorch-transformers/ ) : So the ... | Model ( ) got multiple values for argument 'nr_class ' - SpaCy multi-classification model ( BERT integration ) |
Python : I have the following code copied from github gtfs_SQL_importer : I tried to run this on windows and replaced the call to the UNIX-command cat by the windows equivalent type which should work similar as of is-there-replacement-for-cat-on-windows.However when I execute that code I get some error : the syntax for... | how to pipe multiple sql- and py-scripts |
Python : I have been using a wrapper for a c++-class for exporting functions to python for a while on linux . Now I wanted to make this available to my coworkers using windows . However , I fail to create a usable boost_python dll for this in cygwin . The problem arises when trying to link a dependent module in another... | Linking c++-class for boost_python in cygwin |
Python : I have a pointAnd a pandas dataframeI would like to calculate the distance of every row in the pandas dataframe , to that specific pointI triedMy solution is really slow though ( taking into account that I want to calculate the distance from other points as well.Is there a way to do my calculations more effici... | How to calculate distance for every row in a pandas dataframe from a single point efficiently ? |
Python : Produces instances smaller than those of a `` normal '' class . Why is this ? Source : David Beazley 's recent tweet . <code> class Spam ( object ) : __slots__ = ( '__dict__ ' , ) | Why does __slots__ = ( '__dict__ ' , ) produce smaller instances ? |
Python : In octave , all the numerical output subsequent to the command format bit will show the native bit representation of numbers as stored in the memory . For example , Is there an equivalent command in python to show all the numbers in their native-bit representation ( so the output is as shown below ) ? ( This i... | Is there a python equivalent of the octave command ` format bit ` ? |
Python : Do Python 's stylistic best practices apply to scientific coding ? I am finding it difficult to keep scientific Python code readable.For example , it is suggested to use meaningful names for variables and to keep the namespace ordered by avoiding import * . Thus , e.g . : But these suggestions can lead to some... | Readability of Scientific Python Code ( Line Continuations , Variable Names , Imports ) |
Python : I thought int in python is represented by 4 bytes , why is it reporting 12 bytes Please someone explain why is it reporting 12 bytes when int uses just 4 bytes <code> > > > sys.getsizeof ( int ) 436 # ? does this mean int occupies 436 bytes . > > > sys.getsizeof ( 1 ) 12 # 12 bytes for int object , is this the... | How can i determine the exact size of a type used by python |
Python : I have an Excel ( .xlsx ) file that has two columns of phrases . For example : I want to import it in Python and to get a list of tuples like : What could I do ? <code> John I have a dog Mike I need a catNick I go to school [ ( 'John ' , ' I have a dog ' ) , ( 'Mike ' , ' I need a cat ' ) , ( 'Nick ' , ' I go ... | From Excel to list of tuples |
Python : I have a csv file that has 25000 rows . I want to put the average of every 30 rows in another csv file.I 've given an example with 9 rows as below and the new csv file has 3 rows ( 3 , 1 , 2 ) : What I did : This works well but can this code be better ? <code> | H | ========| 1 | -- -\| 3 | | -- - > | 3 || 5 |... | Calculate average of every n rows from a csv file |
Python : Here is the code I tried : I have tried modifying the neural network and double-cheking the data.Is there anything I can do to improve the outcome ? Is the model not deep enough ? Is there any alternative models suited for my data ? Does this mean these features have no predictive value ? I 'm kind of confused... | keras accuracy does n't improve more than 59 percent |
Python : How can I `` steal '' or copy a method from one class onto another class ? Example code : Expected output : Instead : TypeError : unbound method foo ( ) must be called with A instance as first argument ( got nothing instead ) <code> class A ( object ) : def foo ( self ) : print `` blah '' class B ( object ) : ... | python method stealer |
Python : Is there a comprehensive reference list of the generic setup import step names ? The names of generic setup import steps do n't always match the names of their corresponding xml files for example 'types.xml ' has an import step called 'typeinfo'.In the absence of a list , I would be satisfied with a simple app... | Is there a good reference list for the names of the genericsetup import steps |
Python : Warning , this is a bit recursive ; ) I answered this question : Python : How can i get all the elements in a list before the longest element ? And after I submitted there where another answer that should be faster ( the author thought , and so did I ) . I tried to time the different solutions but the solution... | Timing functions |
Python : I 've got a performance bottleneck . I 'm computing the column-wise mean of large arrays ( 250 rows & 1.3 million columns ) , and I do so more than a million times in my application . My test case in Python : Numpy takes around 400 milliseconds on my machine , running on a single core . I 've tried several oth... | High performance array mean |
Python : I 've used Python for many years but only gradually studied the more obscure features of the language , as most of my code is for data processing . Generators based on yield are part of my routine toolkit , and recently I read about coroutines . I found an example similar to this : which prints the average of ... | Converting from generator-based to native coroutines |
Python : My UploadForm class : HTML Templatehosts.py to run the check for validationUsing VS 's debugging tools , I find that form.validate_on_submit ( ) does n't work and always fails validation and I get this error on my html page . { 'roomImage ' : [ 'File was empty ! ' ] } There is another MultipleFileField control... | FileRequiredValidator ( ) does n't work when using MultipleFileField ( ) in my form |
Python : I 'm trying to split a list of strings into a list of tuples of uneven length containing these strings , with each tuple containing strings initially separated with blank strings . Basically I 'd need the parameterized split that I could apply to lists . If my initial list looks like : The last element of this... | Splitting a list into uneven tuples |
Python : So I looked at a bunch of posts on Pyspark , Jupyter and setting memory/cores/executors ( and the associated memory ) .But I appear to be stuck -Question 1 : I dont see my machine utilizing either the cores or the memory . Why ? Can I do some adjustments to the excutors/cores/memory to optimize speed of readin... | PySpark : Setting Executors/Cores and Memory Local Machine |
Python : I wanted to check if a given x lies in the interval [ 0 , a-1 ] .As a lazy coder I wrote and ( because that piece of code was in 4.5 nested loops ) quickly run into performance issues . I tested it and indeed , it turns out runtime of n in range ( n ) lies in O ( n ) , give or take . I actually thought my code... | ` in range ` construction in python 2 -- - working too slow |
Python : I am using pytest with pycharm , but when I run the test , I get the test and results garbled within the pycharm console , here is an example output : This is rather not pretty , and the result are printed after the test functions report . This is how it should look like when I run pytest from the terminal : I... | pytest output results are garbled within pycharm |
Python : Loading an OpenFOAM case in ParaView using python is straight forward with : However , by default only the internalMesh mesh region is selected in the reader object.Using the trace method of ParaView is not of any help , since the MeshRegion property of the OpenFOAMReader object is simply set to the values of ... | How to select all mesh regions in ParaView OpenFOAM case using python scripting ? |
Python : problem is very simple : I have two 2d np.array and I want to get a third array that only contains the rows that are not in common with the latter twos.for example : I tried np.delete ( X , Y , axis=0 ) but it does n't work ... <code> X = np.array ( [ [ 0,1 ] , [ 1,2 ] , [ 4,5 ] , [ 5,6 ] , [ 8,9 ] , [ 9,10 ] ... | Numpy : how delete rows common to 2 matrices |
Python : While answering this question I had a doubt regarding how to reduce multiple spaces in a string to one in Python without using regex . Say the string is as follows : The first solution that came to my mind was But this will not conserve leading and trailing spaces if the string was something likeIn order to co... | Without regex reduce multiple spaces in a string to one in Python |
Python : I am trying to perform some simple mathematical operations on the files.The columns in below file_1.csv are dynamic in nature the number of columns will increased from time to time . So we can not have fixed last_column master_ids.csv : Before any pre-processingmaster_count.csv : Before any processingmaster_Id... | Pandas Column mathematical operations No error no answer |
Python : So , I was trying to make a basic Tic-Tac-Toe game with python , And I created one which works perfectly fine , but my code is not so good , as it has a lot of code for checking the list indexes ( Winner Of The Game ) , which kinda bothers me . So , How I avoid using the left index for checking the winner of t... | How to avoid multiple ` elif ` statements ? |
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