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---
title: "A Work-Stealing Scheduler"
version: 2
abstract: >
FIXME
syllabus:
- Explain why a single centralized task queue becomes a bottleneck at high worker counts and how per-worker deques address this.
- Describe the asymmetry between owner operations (push/pop from one end) and thief operations (steal fro... | sdxpy/worksteal/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.069 | true | false | 9,719 | -1 |
---
title: "Running Tests"
---
<section class="slide" markdown="1">
## The Problem
- Not all software needs formal testing
- Check one-off data analysis script incrementally
- But 98% of the code in [SQLite][sqlite] is there to test the other 2%
- For which I am grateful
- Good tools make tests eas... | sdxpy/test/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.155 | true | false | 3,402 | -1 |
# License
All of the written material is made available under the Creative
Commons - Attribution - NonCommercial 4.0 International license (CC-BY-NC-4.0),
while the software is made available under the Hippocratic License.
## Writing
*This is a human-readable summary of (and not a substitute for) the license.
For th... | sdxpy/LICENSE.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.06 | true | false | 6,765 | -1 |
---
title: "Serving Web Pages"
---
<section class="slide" markdown="1">
## The Problem
- Uploading and downloading files ([%x ftp %]) is useful,
but we want to do more
- Don't want to create a new [%g protocol "protocol" %] for every interaction
- Use a standard protocol in a variety of ways
</section>
... | sdxpy/http/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.186 | true | false | 4,186 | -1 |
# Contributing
Contributions are very welcome;
please contact us by email or by filing an issue on this site.
All contributors must abide by our Code of Conduct.
## FAQ
What sort of feedback would be useful?
: Everything is welcome, but what would help most is:
1. Fixes for mistakes in the code, the descrip... | sdxpy/CONTRIBUTING.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.04 | true | false | 4,062 | -1 |
---
title: "The Saga Pattern"
version: 2
abstract: >
FIXME
syllabus:
- Explain why traditional ACID transactions cannot span multiple independent services and what problem sagas solve.
- Describe the difference between orchestration and choreography, and give a scenario where each approach is more suitable.
- ... | sdxpy/saga/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.066 | true | false | 9,564 | -1 |
runtime -- uses -> recursive evaluation
runtime -- stores variables in -> environments
functions -- found by -> introspection
environments -- many -> local environment
environments -- one -> global environment
recursive evaluation -- to -> dispatch
dispatch -- simple -> functions
introspection -- makes systems -> exten... | sdxpy/_extras/concepts/interp.md | books | sdxpy | sdxpy/_extras/concepts | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0 | true | false | 363 | -1 |
---
title: "A Package Manager"
---
<section class="slide" markdown="1">
## The Problem
- Packages and their dependencies change over time
- If A and B require different versions of C
it might not be possible to use A and B together
- Need a systematic way to find globally-consistent sets of packages
</s... | sdxpy/pack/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.151 | true | false | 6,502 | -1 |
layout engine -- uses -> coordinate system
layout engine -- handles -> rendering
rendering -- using -> recursion
rendering -- of -> blocks
row -- can -> wrap
blocks -- stored as -> tree
recursion -- to traverse -> tree
blocks -- have -> position
position -- in -> coordinate system
position -- calculate -> {column, row}... | sdxpy/_extras/concepts/layout.md | books | sdxpy | sdxpy/_extras/concepts | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0 | true | false | 321 | -1 |
---
title: "Page Layout"
version: 1
abstract: >
Browsers, e-book readers, and text editors all rely on some kind of layout engine
that takes text and formatting instructions as input
and decides where to put each character and image.
To explore how they work,
this chapter builds a small HTML layout ... | sdxpy/layout/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.083 | true | false | 15,206 | -1 |
---
title: "A File Cache"
version: 2
abstract: >
FIXME
syllabus:
- Software systems often use caches to store a subset of files in order to use less disk space.
- Caching systems can replace actual files with placeholders containing metadata.
- Object-oriented systems are often implemented in stages to break ... | sdxpy/cache/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.064 | true | false | 16,496 | -1 |
---
title: "Conclusion"
---
<section class="slide" markdown="1">
## Consider the Bicycle
[% figure
slug="finale-bicycle"
img="derosa.jpg"
alt="De Rosa SK Pininfarina bicycle"
caption="De Rosa SK Pininfarina bicycle."
cls=fullwidth
%]
</section>
<section class="slide" markdown="1">
## Now Think About... | sdxpy/finale/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.175 | true | false | 1,180 | -1 |
---
title: "Matching Patterns"
---
<section class="slide" markdown="1">
## The Problem
- `glob.glob` finds files whose names match patterns
- `2023-*.{pdf,txt}` matches `2023-01.txt` and `2023-final.pdf`
but not `draft-2023.docx`
[% figure
slug="glob-examples"
img="examples.svg"
alt="Matching exam... | sdxpy/glob/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.167 | true | false | 5,892 | -1 |
---
title: "Building TCP on UDP"
version: 2
abstract: >
FIXME
syllabus:
- Explain how sequence numbers, acknowledgments, and retransmission together guarantee reliable delivery over an unreliable network.
- Describe how a sliding window allows multiple segments to be in flight simultaneously and why this improv... | sdxpy/tcp/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.115 | true | false | 13,145 | -1 |
---
title: "Search"
version: 2
abstract: >
FIXME
syllabus:
- FIXME
---
[%fixme "build TF-IDF with stemming" %] [%issue 278 %]
- Want to search the abstracts of over 2000 papers
- Use [%g tf_idf "term frequency - inverse document frequency" %] (TF-IDF)
- Term frequency: frequency of each word in each d... | sdxpy/unused/search/index.md | books | sdxpy | sdxpy/unused/search | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.082 | true | false | 1,950 | -1 |
dataframe -- supports -> operations
select -- keep -> columns
filter -- keep -> rows
filter -- slow -> column-wise
filter -- fast -> row-wise
select -- fast -> column-wise
select -- slow -> row-wise
experiments -- help design -> operations
dataframe -- stored -> {column-wise, row-wise}
dataframe -- has -> {columns, row... | sdxpy/_extras/concepts/perf.md | books | sdxpy | sdxpy/_extras/concepts | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0 | true | false | 365 | -1 |
## Solutions
### Adding Strings
The trick is to mimic the grade-school addition algorithm: process the
two strings from right to left, add the digits at each position along
with any carry from the previous column, and build the result from least
significant digit to most. We reverse each input, zip them together
wit... | sdxpy/solutions/binary/index.md | books | sdxpy | sdxpy/solutions/binary | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.109 | true | false | 3,792 | -1 |
---
title: "Generating Documentation"
version: 2
abstract: >
FIXME
syllabus:
- FIXME
- Instructions are just numbers but may be represented as assembly code.
- Instructions may refer to registers, memory, both, or neither.
- A processor usually executes instructions in order but may jump to another location... | sdxpy/docgen/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.068 | true | false | 4,132 | -1 |
---
title: "Protocols"
---
<section class="slide" markdown="1">
## The Problem
- Want to use some more advanced features of Python in coming examples
- Can now explain them in terms of what we've seen in previous lessons
</section>
<section class="slide" markdown="1">
## Mock Objects
[%inc mock_time.py %]
-... | sdxpy/protocols/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.179 | true | false | 4,277 | -1 |
---
title: "Glossary"
---
## A
<span id="absolute_error">absolute error</span>
: The absolute value of the difference between the observed and the correct value. Absolute error is usually less useful than [relative error](#relative_error).
<span id="abstract_base_class">abstract base class</span>
: An [abstract clas... | sdxpy/glossary/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.035 | true | false | 70,085 | -1 |
## Solutions
### Packing Null Bytes
The original `pack` method joins fields with null bytes (`\0`), so any
null byte inside a field breaks the round-trip. The fix is to drop
delimiter-based framing and use *length-prefixed encoding* instead:
before each field we write its length as a decimal number followed by a
col... | sdxpy/solutions/db/index.md | books | sdxpy | sdxpy/solutions/db | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.129 | true | false | 4,196 | -1 |
---
title: "An Interpreter"
version: 1
abstract: >
A program in memory is just a data structure,
each of whose elements triggers some operation in the interpreter that's executing it.
This chapter builds a very simple interpreter to show how this process works,
and to show that we can evaluate the quali... | sdxpy/interp/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.065 | true | false | 12,761 | -1 |
## Solutions
### Sequencing Backups
The timestamp-based naming scheme in the chapter suffers from the problem that two backups created in the same second will try to write the same manifest file. Changing to sequential numbering---`00000001.csv`, `00000002.csv`, and so on---means we need a way to know what the next a... | sdxpy/solutions/archive/index.md | books | sdxpy | sdxpy/solutions/archive | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.25 | true | false | 6,652 | -1 |
---
title: "Performance Profiling"
---
<section class="slide" markdown="1">
## The Problem
- We can build dataframes several different ways
- Which will be most efficient?
- Find out by doing experiments
</section>
<section class="slide" markdown="1">
## What Can Dataframes Do?
[%inc df_base.py %]
</sect... | sdxpy/perf/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.192 | true | false | 4,990 | -1 |
---
title: "MapReduce Framework"
version: 2
abstract: >
FIXME
syllabus:
- Describe the five phases of MapReduce (input split, map, shuffle, reduce, output) and explain what happens in each phase.
- Explain what a combiner does, when it is safe to use one, and why it reduces network traffic.
- Explain why MapR... | sdxpy/mapreduce/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.073 | true | false | 10,584 | -1 |
## Solutions
### Dangling Colon
The alias marker line `alias:12345678:` ends with a colon because the
archive format uses three colon-separated fields for every entry:
*key*, *ident*, and *value*. An alias has no value to store --- all the
loader needs is the key `"alias"` and the identifier of the
already-seen obje... | sdxpy/solutions/persist/index.md | books | sdxpy | sdxpy/solutions/persist | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.076 | true | false | 5,233 | -1 |
[academic_prototyping]: https://www.fuzzingbook.org/html/AcademicPrototyping.html
[amazon-sqs]: https://aws.amazon.com/sqs/
[aosa]: https://aosabook.org/
[apache-cassandra]: https://cassandra.apache.org/
[apache-spark]: https://spark.apache.org/
[apache-zookeeper]: https://zookeeper.apache.org/
[apache]: https://httpd.... | sdxpy/_extras/links.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0 | true | false | 9,075 | -1 |
unit test -- tests -> function
unit test -- found by -> introspection
introspection -- looks in -> global dictionary
unit test -- stored in -> function
function -- stored in -> global dictionary
function -- has -> attributes
attributes -- such as -> docstring
unit test -- result can be -> {error, fail, pass}
| sdxpy/_extras/concepts/test.md | books | sdxpy | sdxpy/_extras/concepts | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0 | true | false | 310 | -1 |
## Solutions
### Handling Named Arguments
The `call` function shown in the chapter captures extra positional
arguments with `*args` and spreads them into the method. Adding support
for named (keyword) arguments follows the same pattern: capture them
with `**kwargs` and spread them with `**kwargs`. The change is
sur... | sdxpy/solutions/oop/index.md | books | sdxpy | sdxpy/solutions/oop | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.103 | true | false | 4,767 | -1 |
## Solutions
### Escape Characters
The key change is in the tokenizer's `tok` method.
When we encounter a backslash,
we read the next character and append it directly to the current literal,
regardless of whether that character would normally be treated as special.
This means `\*` becomes part of a `Lit` token contai... | sdxpy/solutions/parse/index.md | books | sdxpy | sdxpy/solutions/parse | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.093 | true | false | 3,918 | -1 |
---
title: "A Virtual Machine"
---
<section class="slide" markdown="1">
## The Problem
- Still a lot of magic in the interpreter of [%x interp %]
- Build something that mimics hardware more closely
- See [%b Nisan2021 %] for a fuller description
- Or play [Human Resource Machine][human_resource_machine]
... | sdxpy/vm/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.176 | true | false | 5,203 | -1 |
---
title: "Functions and Closures"
version: 1
abstract: >
This chapter extends the little interpreter of the previous one
to allow users to define functions of their own.
By doing so,
it shows that the way programs handle variable scope is a design choice,
and that the use of a particular technique... | sdxpy/func/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.082 | true | false | 11,581 | -1 |
---
title: "Domain Name System (DNS)"
version: 2
abstract: >
FIXME
syllabus:
- Trace the full resolution walk from root name server to TLD to authoritative server for a domain name.
- Explain how TTL-based caching reduces DNS query load and why negative caching (for non-existent domains) matters.
- Describe h... | sdxpy/dns/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.059 | true | false | 10,678 | -1 |
---
title: "Objects and Classes"
version: 1
abstract: >
Object-oriented programming was invented to solve two problems:
what is a natural way to represent real-world "things" in code,
and how can we organize that code so that it's easiser to understand, test, and extend?
This chapter shows how object-or... | sdxpy/oop/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.07 | true | false | 12,440 | -1 |
version control -- uses -> hash function
version control -- saves -> files
version control -- creates -> manifest
manifest -- records set of -> files
manifest -- needs -> unique name
unique name -- must avoid -> race conditions
hash code -- uniquely identifies -> files
hash function -- reads -> files
hash function -- p... | sdxpy/_extras/concepts/archive.md | books | sdxpy | sdxpy/_extras/concepts | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0 | true | false | 422 | -1 |
---
title: "Serving Web Pages"
version: 1
abstract: >
The Hypertext Transfer Protocol (HTTP) defines a way for programs to exchange data over the web.
Clients (such as browsers) send requests to servers,
which respond by copying files from disk,
pulling records from a database,
or in any of dozens o... | sdxpy/http/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.065 | true | false | 14,996 | -1 |
---
title: "A Code Linter"
---
<section class="slide" markdown="1">
## The Problem
- Want to check that our code follows style rules
- And doesn't do things that are likely to be bugs
- Build a [%g linter "linters" %]
- Checks for "fluff" in code
</section>
<section class="slide" markdown="1">
## Pr... | sdxpy/lint/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.177 | true | false | 3,724 | -1 |
---
title: "Matching Patterns"
version: 1
abstract: >
Pattern-matching is ubiquitous in computer programs.
Whether we are selecting a set of files to open
or finding names and email addresses inside those files,
we need an efficient way to find matches for complex patterns.
This chapter therefore i... | sdxpy/glob/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.075 | true | false | 13,174 | -1 |
glob -- is a -> pattern
pattern -- matches -> text
pattern -- written as -> text
pattern -- relates to -> matchers
pattern -- relates to -> matchers
matchers -- each implemented as -> class
class -- of -> base class
matchers -- cooperate using -> Chain of Responsiblity
Chain of Responsiblity -- ends with -> Null Object... | sdxpy/_extras/concepts/glob.md | books | sdxpy | sdxpy/_extras/concepts | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0 | true | false | 321 | -1 |
## Solutions
### More Efficient Filtering
The original `DfCol.filter` builds a temporary dictionary containing
every column value for every row, then spreads it across the filter
function. We can reduce this overhead by using `inspect` to discover
which parameters the function actually needs, and by passing a row
in... | sdxpy/solutions/perf/index.md | books | sdxpy | sdxpy/solutions/perf | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.118 | true | false | 5,728 | -1 |
## Solutions
### Rewriting Environment Creation
The original line uses `zip` and `dict` together to build a stack frame
in a single expression:
[%inc sol_rewriting_environment_creation.py %]
Rewriting it with an explicit loop makes each step visible. You create
an empty dictionary, walk through the parameter names... | sdxpy/solutions/func/index.md | books | sdxpy | sdxpy/solutions/func | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.085 | true | false | 7,702 | -1 |
## Solutions
### Tracing Execution
A trace directive helps with debugging by showing the current value of a
variable as the template is expanded. We add a new handler for the
`z-trace` attribute that looks up the named variable in the environment and
prints its value to standard error. The handler's `open` method o... | sdxpy/solutions/template/index.md | books | sdxpy | sdxpy/solutions/template | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.088 | true | false | 8,409 | -1 |
mock object -- simplifies -> testing
socket address -- associated with -> service
computer -- actually known by -> IP address
domain name -- translated into -> IP address
computer -- usually known by -> domain name
service -- running on -> server
server -- partially replace with -> mock object
mock object -- reduces ->... | sdxpy/_extras/concepts/ftp.md | books | sdxpy | sdxpy/_extras/concepts | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0 | true | false | 420 | -1 |
---
title: "OAuth"
version: 2
abstract: >
FIXME
syllabus:
- Trace the authorization code flow through all four parties (resource owner, client, authorization server, resource server) and explain what each step accomplishes.
- Explain what PKCE adds to the authorization code flow and why it is necessary for publ... | sdxpy/oauth/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.059 | true | false | 15,521 | -1 |
---
title: "Eventually Consistent Key-Value Store"
version: 2
abstract: >
FIXME
syllabus:
- Explain what "availability" and "partition tolerance" mean and why a system must choose between them and strong consistency during a network partition.
- Describe how vector clocks track causal history and explain why ta... | sdxpy/eventual/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.071 | true | false | 12,721 | -1 |
---
title: "Concurrency"
version: 2
abstract: >
FIXME
syllabus:
- FIXME
---
**In Development**
- `switch.py`: show task switching
- `parent.py`: show greenlet ID and parentage
- `classes.py`: use objects instead of bare functions
- but `set_other` method is clumsy: how should we connect them?
- `s... | sdxpy/concur/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.12 | true | false | 1,031 | -1 |
---
title: "Finding Duplicate Files"
---
<section class="slide" markdown="1">
## Overview
- We want to find duplicate files, but can't rely on their names
- Comparing pairs of files byte by byte is slow
- And gets slower per file as the number of files grows
- Better approach:
- Calculate an id... | sdxpy/dup/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.16 | true | false | 6,340 | -1 |
---
title: "Introduction"
---
<section class="slide" markdown="1">
## The Problem
- Most data scientists are self-taught programmers
- Often know they have gaps in their knowledge
- And other gaps they don't even know about
</section>
<section class="slide" markdown="1">
## Complexity
- One of those... | sdxpy/intro/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.15 | true | false | 4,101 | -1 |
## Solutions
### Finding Unused Parameters
The original `FindUnusedVariables` visitor reports variables that are stored but never loaded within a scope. It already handles the global scope and every function scope, but it never records the function's own parameters as "stored" names. Those parameters live in `node.... | sdxpy/solutions/lint/index.md | books | sdxpy | sdxpy/solutions/lint | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.25 | true | false | 7,853 | -1 |
---
title: "Distributed Tracing"
version: 2
abstract: >
FIXME
syllabus:
- Explain what a span and a trace are, and describe how spans form a tree that represents a distributed call graph.
- Describe how a decorator can add tracing to a function without modifying the function's body.
- Explain what head-based ... | sdxpy/tracing/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.059 | true | false | 11,283 | -1 |
---
title: "A Debugger"
---
<section class="slide" markdown="1">
## The Problem
- Tracing execution with `print` statements is tedious
- And impossible (or nearly so) in some situations
- Single-stepping/breakpoint debugger is far more effective
- Build one to understand how they work
- And to show how... | sdxpy/debugger/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.167 | true | false | 5,619 | -1 |
## Solutions
### Looping Over `globals`
The first snippet raises a `RuntimeError` because of how Python handles
dictionary iteration. When `for name in globals():` executes, Python
calls `globals()` once to get the module dictionary, then creates an
iterator over its keys. The loop variable `name` is a new assignme... | sdxpy/solutions/test/index.md | books | sdxpy | sdxpy/solutions/test | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.086 | true | false | 5,495 | -1 |
---
title: "An Interpreter"
---
<section class="slide" markdown="1">
## Background
- Programs are just data
- Compilers and interpreters are just programs
- Compiler: generate instructions once in advance
- Interpreter: generate instructions on the fly
- Differences are increasingly blurry in p... | sdxpy/interp/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.183 | true | false | 3,849 | -1 |
---
title: "A Debugger"
version: 1
abstract: >
Debuggers are as much a part of good programmers' working lives as version control
but are taught far less often.
This chapter therefore builds a simple single-stepping debugger
for the virtual machine of the previous chapter
and shows how we can test i... | sdxpy/debugger/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.055 | true | false | 18,126 | -1 |
---
title: "Undo and Redo"
---
<section class="slide" markdown="1">
## The Problem
- Want to change files as well as viewing them
- So modify the file viewer of [%x viewer %] to allow editing
- And since people make mistakes when editing, implement undo
</section>
<section class="slide" markdown="1">
## St... | sdxpy/undo/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.171 | true | false | 5,008 | -1 |
---
title: "A File Archiver"
---
<section class="slide" markdown="1">
## The Problem
- Want to save snapshots of work in progress
- Create a simple [%g version_control_system "version control system" %]
- And show how to test it using mock objects ([%x protocols %])
</section>
<section class="slide" markdow... | sdxpy/archive/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.185 | true | false | 4,509 | -1 |
## Solutions
### Refactoring
The three original classes — `Block`, `Row`, and `Col` — all share the same
interface (`get_width` and `get_height`) but don't declare it anywhere. We
can extract that contract into an abstract base class called `Cell` that
raises `NotImplementedError` for both methods, then have the thr... | sdxpy/solutions/layout/index.md | books | sdxpy | sdxpy/solutions/layout | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.125 | true | false | 5,723 | -1 |
package manager -- uses -> theorem prover
theorem prover -- to find -> compatible
packages -- installed by -> package manager
packages -- installation requires -> compatible
compatible -- sets of -> dependencies
packages -- have -> dependencies
dependencies -- are -> packages
packages -- have -> versions
semantic versi... | sdxpy/_extras/concepts/pack.md | books | sdxpy | sdxpy/_extras/concepts | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0 | true | false | 364 | -1 |
dynamic dispatch -- relates to -> uniform signature
persistence -- must be -> extensible
extensible -- to handle -> user classes
extensible -- should respect -> Open-Closed Principle
extensible -- via -> dynamic dispatch
dynamic dispatch -- needs -> uniform signature
persistence -- for -> {atomic values, collections, u... | sdxpy/_extras/concepts/persist.md | books | sdxpy | sdxpy/_extras/concepts | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0 | true | false | 385 | -1 |
## Solutions
### Looping
The Chain of Responsibility design gives each matcher a reference to the next matcher in line. An alternative is to have a top-level object that holds a plain list of matchers and iterates through them. This approach turns the implicit chain into an explicit list, which makes it easier to see... | sdxpy/solutions/glob/index.md | books | sdxpy | sdxpy/solutions/glob | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.345 | true | false | 5,189 | -1 |
---
title: "A File Viewer"
---
<section class="slide" markdown="1">
## The Problem
- We have been editing a lot of files
- How can we display a text file in a window?
- How can we move around in that file?
- How we can change it will be the topic of [%x undo %]
</section>
<section class="slide" markdown=... | sdxpy/viewer/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.174 | true | false | 7,410 | -1 |
## Solutions
### Comparing Semantic Versions
The trick to sorting semantic versions is to break each one into its three
numeric components and compare those as integers rather than comparing the
strings as decimals. If we compare `"2.1"` and `"1.99"` as strings, `"2.1"`
comes first because the character `'2'` is les... | sdxpy/solutions/pack/index.md | books | sdxpy | sdxpy/solutions/pack | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.07 | true | false | 8,379 | -1 |
elements -- represented as -> text
elements -- have -> attributes
HTML -- stored in memory as -> DOM tree
DOM tree -- usually processed using -> recursion
recursion -- can be implemented using -> Visitor pattern
DOM tree -- consists of -> nodes
Visitor pattern -- calls a method for each -> nodes
HTML -- should conform ... | sdxpy/_extras/concepts/check.md | books | sdxpy | sdxpy/_extras/concepts | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0 | true | false | 456 | -1 |
## Solutions
### Setting Up
The `ruff` linter watches for a wide range of problems: unused imports, undefined names, overly complex functions, and stylistic inconsistencies like trailing whitespace or the wrong number of blank lines between definitions. Installing it with `pip install ruff` and running `ruff check` o... | sdxpy/solutions/intro/index.md | books | sdxpy | sdxpy/solutions/intro | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.25 | true | false | 2,995 | -1 |
## Solutions
### Simplify the Logic
The original `Check._tag_enter` packs several operations into one terse
expression: compute actual children, subtract the allowed set, and merge
into the accumulating `self.problems` dictionary. That works, but a new
reader has to pause and mentally unpack what the `|=` inside the... | sdxpy/solutions/check/index.md | books | sdxpy | sdxpy/solutions/check | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.111 | true | false | 4,791 | -1 |
---
title: "Transferring Files"
---
<section class="slide" markdown="1">
## The Problem
- We want to make information available to others
- Which includes programs as well as people
- Understanding how a web server works will help us do this
</section>
<section class="slide" markdown="1">
## TCP/IP
- ... | sdxpy/ftp/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.18 | true | false | 4,370 | -1 |
---
title: "A Database"
version: 1
abstract: >
Almost every real-world application relies on some kind of database
that allows code to look up data without loading everything into memory.
To show how they work,
this chapter builds a very simple database
that appends every new copy of a record to a r... | sdxpy/db/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.062 | true | false | 13,599 | -1 |
---
title: "A File Viewer"
version: 1
abstract: >
Even simple editors like Notepad and Nano do a lot of things:
moving a cursor,
inserting and deleting characters,
and more.
This is too much to fit into one lesson,
so this chapter builds a tool for viewing files,
which the next chapters exte... | sdxpy/viewer/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.053 | true | false | 18,757 | -1 |
build manager -- updates -> files
build manager -- obeys -> build rules
dependencies -- can be -> stale
dependencies -- form a -> directed acyclic graph
directed acyclic graph -- sorted in -> topological order
stale -- compared to -> target
recipe -- updates -> target
dependencies -- are -> files
target -- are -> files... | sdxpy/_extras/concepts/build.md | books | sdxpy | sdxpy/_extras/concepts | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0 | true | false | 432 | -1 |
---
title: "Parsing Text"
---
<section class="slide" markdown="1">
## The Problem
- `"2023-*{pdf,txt}"` is easier to read and write
than `Lit("2023-", Any(Either("pdf", "txt")))`
- How can we translate the former into the latter?
1. Group characters into [%g token "tokens" %]
2. Use tokens to create an ... | sdxpy/parse/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.168 | true | false | 4,297 | -1 |
---
title: "Undo and Redo"
version: 1
abstract: >
Viewing text files is useful,
but we'd like to be able to edit them as well.
This chapter therefore modifies the file viewer of the preceding chapter
so that we can add and delete text.
And since people make mistakes,
it also implements undo,
... | sdxpy/undo/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.074 | true | false | 10,049 | -1 |
---
title: "A Query Builder"
version: 2
abstract: >
FIXME
syllabus:
- FIXME
---
[%fixme "create query builder" %] [%issue 45 %]
- SQL requires parts of query in an odd order
- So create [%g active_record "active records" %] using the [%g builder_pattern "Builder" %] pattern
- Does not scale up to more com... | sdxpy/unused/query/index.md | books | sdxpy | sdxpy/unused/query | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.069 | true | false | 1,402 | -1 |
---
title: "Functions and Closures"
---
<section class="slide" markdown="1">
## Background
- The little programming language of [%x interp %] isn't extensible
- So add a way to define and call functions
- And then look at design tactics this opens up
</section>
<section class="slide" markdown="1">
## Defin... | sdxpy/func/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.159 | true | false | 4,294 | -1 |
---
title: "Binary Data"
---
<section class="slide" markdown="1">
## Why Binary?
- Operations are much faster
- Write addition using textual digits as an exercise
- Bits take less space
- `"10239472"` is 8 bytes, but `10239472` is just 4
- How would we represent images, audio, or video as character... | sdxpy/binary/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.151 | true | false | 7,123 | -1 |
---
title: "Parsing Text"
version: 1
abstract: >
A parser turns text that's easy for a human being to read
into a data structure that a computer can work with.
The complete parser for a language like Python can be very complex,
but this chapter illustrates the key ideas
by building a parser for the ... | sdxpy/parse/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.079 | true | false | 9,203 | -1 |
---
title: "Performance Profiling"
version: 1
abstract: >
This chapter implements the kind of multi-column table frequently used in data science
in two different ways
in order to reinforce earlier ideas about the value of abstraction
and to show how systematic performance testing can be used
to deci... | sdxpy/perf/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.068 | true | false | 18,132 | -1 |
---
title: "An HTML Validator"
version: 1
abstract: >
This chapter builds a tool to check the structure of web pages
in order to show how programs can process HTML,
and to introduce a design pattern that is frequently used
to manage irregular data structures.
syllabus:
- HTML consists of text and of e... | sdxpy/check/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.072 | true | false | 10,474 | -1 |
---
title: "A File Archiver"
version: 1
abstract: >
Most programmers would agree that once they have a text editor
and a way to run their programs,
the next tool they need is version control.
This chapter therefore shows how the core of a simple version control system works
by building a file archiv... | sdxpy/archive/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.066 | true | false | 13,585 | -1 |
---
title: "Transferring Files"
version: 1
abstract: >
A typical web application is made up of clients that send messages to servers
and then wait for them to respond.
This chapter shows how they work at a low level
by building a simple low-level client-server program
to move files from one machine ... | sdxpy/ftp/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.054 | true | false | 12,404 | -1 |
---
title: "A Template Expander"
version: 1
abstract: >
Writing and updating HTML pages by hand is time-consuming and error-prone,
so most modern websites use some kind of static site generator (SSG)
to create pages from templates.
This chapter builds a simple SSG to show how they work
and to reinfo... | sdxpy/template/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.068 | true | false | 16,410 | -1 |
---
title: "Binary Data"
version: 1
abstract: >
Python and other high-level languages shield programmers from the low-level details
of how computers actually store and manipulate data,
but sooner or later someone has to worry about bits and bytes.
This chapter explores how computers represent numbers an... | sdxpy/binary/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.047 | true | false | 21,736 | -1 |
---
title: "A Virtual Machine"
version: 1
abstract: >
The standard version of Python is implemented in C,
but C is compiled to instructions for a particular processor.
To show how that lower layer works,
this chapter builds a simulator of a small computer
and an assembler for a very simple language ... | sdxpy/vm/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.08 | true | false | 14,277 | -1 |
---
title: "Network Time Protocol (NTP)"
version: 2
abstract: >
FIXME
syllabus:
- Derive the NTP offset and round-trip delay formulas from four timestamps and identify the symmetric-delay assumption they rely on.
- Explain why synchronization error accumulates across NTP strata and what limits how accurately a ... | sdxpy/ntp/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.051 | true | false | 9,023 | -1 |
---
title: "An HTML Validator"
---
<section class="slide" markdown="1">
## The Problem
- We generate HTML pages to report experiments
- Want to be sure they have the right structure
so that people can get information out of them reliably
- Learning how to do this prepares us for checking code
</section>... | sdxpy/check/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.184 | true | false | 4,574 | -1 |
---
title: "BitTorrent Protocol"
version: 2
abstract: >
FIXME
syllabus:
- Explain the swarming property of BitTorrent and why adding more downloaders increases available upload capacity.
- Describe the rarest-first piece selection strategy and explain why it maintains piece diversity in the swarm.
- Explain h... | sdxpy/torrent/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.218 | true | false | 10,730 | -1 |
bytes -- from -> file
hash function -- input is -> bytes
hash function -- output is -> hash code
hash code -- unique for each sequence of -> bytes
file -- may be -> duplicates
hash code -- improves -> efficiency
efficiency -- of detecting -> duplicates
efficiency -- measured by -> big-oh
hash code -- is -> {determinist... | sdxpy/_extras/concepts/dup.md | books | sdxpy | sdxpy/_extras/concepts | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0 | true | false | 399 | -1 |
---
title: "Bonus Material"
---
Each chapter in this book is designed to be teachable in one classroom hour.
This appendix presents material that extends core ideas
but would break that [%g attention_budget "attention budget" %].
## Using Function Attributes {: #bonus-attributes}
<div class="center" markdown="1">
*... | sdxpy/bonus/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.054 | true | false | 19,522 | -1 |
---
title: "Bibliography"
---
## A
<span id="Aniche2022">Aniche2022</span>
: Maurício Aniche:
*Effective Software Testing: A developer's guide*.
Manning,
2022.
ISBN 978-1633439931.
<span id="Armstrong2013">Armstrong2013</span>
: Tavish Armstrong (ed.):
*The Performance of Open Source Applicat... | sdxpy/bibliography/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.23 | true | false | 5,752 | -1 |
## Solutions
### Chunk Sizes
When the client sends zero bytes, the server's first call to `recv`
returns an empty byte string. Since zero is less than `CHUNK_SIZE`,
the loop exits immediately and the server reports zero bytes received.
When the client sends exactly `CHUNK_SIZE` bytes, the server reads all
of them o... | sdxpy/solutions/ftp/index.md | books | sdxpy | sdxpy/solutions/ftp | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.098 | true | false | 2,896 | -1 |
---
title: "Objects and Classes"
---
<section class="slide" markdown="1">
## The Problem(s)
- What is a natural way to represent real-world "things" in code?
- How can we organize code to make it easier to understand, test, and extend?
- Are these the same thing?
</section>
<section class="slide" markdown="... | sdxpy/oop/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.211 | true | false | 4,314 | -1 |
---
title: "Distributed Lock Manager"
version: 2
abstract: >
FIXME
syllabus:
- Describe the split-brain problem and explain why a lock acquired over an unreliable network can be held by two clients simultaneously.
- Explain how fencing tokens prevent stale lock holders from corrupting shared state even after th... | sdxpy/distlock/index.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.049 | true | false | 12,752 | -1 |
---
title: "Page Layout"
---
<section class="slide" markdown="1">
## The Problem
- Text is a sequence of characters, but a page is two-dimensional
- How can we put the right things in the right places?
- Create a simple version of a [%g layout_engine "layout engine" %] for a browser
- But the same ideas a... | sdxpy/layout/slides.md | books | sdxpy | sdxpy | CC-BY-NC-4.0 | CC-BY-NC-4.0 | 469c08a8807c631cf0f4deea675782775cc83ac4 | doc | false | 0.18 | true | false | 4,687 | -1 |
// Copyright 2020-2026 The Khronos Group Inc.
//
// SPDX-License-Identifier: CC-BY-4.0
include::{generated}/meta/{refprefix}VK_KHR_pipeline_library.adoc[]
=== Other Extension Metadata
*Last Modified Date*::
2020-01-08
*IP Status*::
No known IP claims.
*Contributors*::
- See contributors to `apiext:VK_KHR_r... | vulkan-spec/appendices/VK_KHR_pipeline_library.adoc | books | vulkan-spec | vulkan-spec | CC-BY-4.0 | CC-BY-4.0 | b94f8bd2d004d2949469d8a5071ee10eb7d23566 | doc | false | 0.364 | false | false | 852 | -1 |
// Copyright (c) 2020 Simon Ser
//
// SPDX-License-Identifier: CC-BY-4.0
include::{generated}/meta/{refprefix}VK_EXT_physical_device_drm.adoc[]
=== Other Extension Metadata
*Last Modified Date*::
2021-06-09
*IP Status*::
No known IP claims.
*Contributors*::
- Simon Ser
=== Description
This extension prov... | vulkan-spec/appendices/VK_EXT_physical_device_drm.adoc | books | vulkan-spec | vulkan-spec | CC-BY-4.0 | CC-BY-4.0 | b94f8bd2d004d2949469d8a5071ee10eb7d23566 | doc | false | 0.229 | false | false | 1,514 | -1 |
// Copyright 2026 The Khronos Group Inc.
//
// SPDX-License-Identifier: CC-BY-4.0
// Common Valid Usage
// Common to VkDescriptorMappingSource* structures that specify embedded samplers
* [[VUID-{refpage}-pEmbeddedSampler-11445]]
If pname:pEmbeddedSampler is a valid pointer to a
slink:VkSamplerCreateInfo, it... | vulkan-spec/chapters/commonvalidity/descriptor_heap_embedded_sampler_common.adoc | books | vulkan-spec | vulkan-spec/chapters/commonvalidity | CC-BY-4.0 | CC-BY-4.0 | b94f8bd2d004d2949469d8a5071ee10eb7d23566 | doc | false | 0.375 | false | false | 1,122 | -1 |
// Copyright 2017-2026 The Khronos Group Inc.
//
// SPDX-License-Identifier: CC-BY-4.0
include::{generated}/meta/{refprefix}VK_EXT_subgroup_size_control.adoc[]
=== Other Extension Metadata
*Last Modified Date*::
2019-03-05
*Contributors*::
- Jeff Bolz, NVIDIA
- Faith Ekstrand, Intel
- Sławek Grajewski, Int... | vulkan-spec/appendices/VK_EXT_subgroup_size_control.adoc | books | vulkan-spec | vulkan-spec | CC-BY-4.0 | CC-BY-4.0 | b94f8bd2d004d2949469d8a5071ee10eb7d23566 | doc | false | 0.123 | false | false | 3,356 | -1 |
// Copyright 2018-2026 The Khronos Group Inc.
//
// SPDX-License-Identifier: CC-BY-4.0
include::{generated}/meta/{refprefix}VK_KHR_video_decode_queue.adoc[]
=== Other Extension Metadata
*Last Modified Date*::
2023-12-05
*IP Status*::
No known IP claims.
*Contributors*::
- Ahmed Abdelkhalek, AMD
- Jake Be... | vulkan-spec/appendices/VK_KHR_video_decode_queue.adoc | books | vulkan-spec | vulkan-spec | CC-BY-4.0 | CC-BY-4.0 | b94f8bd2d004d2949469d8a5071ee10eb7d23566 | doc | false | 0.483 | false | false | 2,601 | -1 |
// Copyright 2019-2026 The Khronos Group Inc.
//
// SPDX-License-Identifier: CC-BY-4.0
// Common Valid Usage
// Common to indirect drawing commands with a pname:countBuffer parameter
* [[VUID-{refpage}-countBuffer-02714]]
If pname:countBuffer is non-sparse then it must: be bound completely and
contiguously t... | vulkan-spec/chapters/commonvalidity/draw_indirect_count_common.adoc | books | vulkan-spec | vulkan-spec/chapters/commonvalidity | CC-BY-4.0 | CC-BY-4.0 | b94f8bd2d004d2949469d8a5071ee10eb7d23566 | doc | false | 0.48 | false | false | 1,218 | -1 |
// Copyright (c) 2018-2020 NVIDIA Corporation
//
// SPDX-License-Identifier: CC-BY-4.0
include::{generated}/meta/{refprefix}VK_NV_mesh_shader.adoc[]
=== Other Extension Metadata
*Last Modified Date*::
2018-07-19
*Interactions and External Dependencies*::
- This extension provides API support for
{GLSLregis... | vulkan-spec/appendices/VK_NV_mesh_shader.adoc | books | vulkan-spec | vulkan-spec | CC-BY-4.0 | CC-BY-4.0 | b94f8bd2d004d2949469d8a5071ee10eb7d23566 | doc | false | 0.496 | false | false | 4,415 | -1 |
// Copyright 2017-2026 The Khronos Group Inc.
//
// SPDX-License-Identifier: CC-BY-4.0
include::{generated}/meta/{refprefix}VK_KHR_16bit_storage.adoc[]
=== Other Extension Metadata
*Last Modified Date*::
2017-09-05
*IP Status*::
No known IP claims.
*Interactions and External Dependencies*::
- This extensio... | vulkan-spec/appendices/VK_KHR_16bit_storage.adoc | books | vulkan-spec | vulkan-spec | CC-BY-4.0 | CC-BY-4.0 | b94f8bd2d004d2949469d8a5071ee10eb7d23566 | doc | false | 0.241 | false | false | 2,292 | -1 |
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