Notice: While JavaScript is not essential for this website, your interaction with the content will be limited. Please turn JavaScript on for the full experience.

Search Python.org

Results

  • PEP 649 -- Deferred Evaluation Of Annotations Using Descriptors

    ...Python annotations back into strings at compile time, requiring users of annotations to eval() those strings to restore them to their actual Python values. This has several drawbacks: It requires Python implementations to stringize their annotations. This is surprising behavior—unprecedented for a language-level feature. Also, adding this feature to CPython was complicated, and this complicated code would need to be reimplemented independently by every other Python implementation. It require...

  • PEP 502 -- String Interpolation - Extended Discussion

    ...python.org/3/library/string.html#format-string-syntax) [11]Python Format-Spec Mini Language (https://docs.python.org/3/library/string.html#format-specification-mini-language) [12]Escaping of Input Variables (https://mail.python.org/pipermail/python-ideas/2015-August/035532.html) [13]Environment Access and Command Substitution (https://mail.python.org/pipermail/python-ideas/2015-August/035554.html) [14]Extensible String Prefixes (https://mail.python.org/pipermail/python-id...

  • Other Documentation Tools

    ...Python (download from the SourceForge project page). AutoDoc -- Documentation generator for Tcl. I don't see any online examples of actual source files, but the sources for the tool are documented using itself. ROBODoc -- Another multi-lingual tool, supports C, C++, Java, Assembler, Basic, Fortran, LaTeX, Postscript, Tcl/Tk, LISP, Forth, Perl, Shell Scripts, Occam, COBOL, HTML, and others (accord...

  • PEP 501 -- General purpose string interpolation

    ...Python) References [1]%-formatting (https://docs.python.org/3/library/stdtypes.html#printf-style-string-formatting) [2]str.format (https://docs.python.org/3/library/string.html#formatstrings) [3]string.Template documentation (https://docs.python.org/3/library/string.html#template-strings) [4]PEP 215: String Interpolation [5]PEP 292: Simpler String Substitutions [6]PEP 3101: Advanced String Formatting [7]PEP 498: Literal string formatting [8]FormattableStr...

  • Foreword for "Programming Python" (1st ed.)

    ...Python as a working title for the project, being in a slightly irreverent mood (and a big fan of Monty Python's Flying Circus). Today, I can safely say that Python has changed my life. I have moved to a different continent. I spend my working days developing large systems in Python, when I'm not hacking on Python or answering Python-related email. There are Python T-shirts, workshops, mailing lists, a newsgroup, and now a book. Frankly, my only unfulfilled wish is to have my pictu...

  • Python Success Stories

    ...Python. At the time of our investigation, Python had reached version 2.5, and a what we felt was a credible level of maturity. While not a "main-stream" choice, Python was attractive because of its cross-platform abilities and the productivity I felt the language could bring to the team. Some of my team members were skeptical and preferred the tried-and-true power of C/C++ for systems programming. We decided that those members would work on the web GUI for configuration of the product,...

  • Download Python for Other Platforms

    ...Python for iOS and iPadOS Pythonista is a complete development environment for writing Python scripts including third-party libraries and system integration on your iPad or iPhone. Pyto also provides a complete development environment for running Python 3 including many third-party libraries and system integration on an iPad or iPhone. Python for OS/390 and z/OS Rocket Software provides a port of Python for z/OS. They support both Python 2 and Python 3. Python for RISC OS Python is...

  • PEP 215 -- String Interpolation

    ...Python-Version:2.1 Post-History: Superseded-By:292 Contents Abstract Copyright Specification Examples Discussion Security Issues Implementation References Abstract This document proposes a string interpolation feature for Python to allow easier string formatting. The suggested syntax change is the introduction of a '$' prefix that triggers the special interpretation of the '$' character within a string, in a manner reminiscent to the variable interpolation found in Unix shells, awk, ...

  • PEP 405 -- Python Virtual Environments

    ...Python packages without system-administrator access, and automated testing of Python software across multiple Python versions, among other uses. Existing virtual environment tools suffer from lack of support from the behavior of Python itself. Tools such as rvirtualenv, which do not copy the Python binary into the virtual environment, cannot provide reliable isolation from system site directories. Virtualenv, which does copy the Python binary, is forced to duplicate much of Python's site modul...

  • Python Success Stories

    ...Python's interpreted nature was also a benefit: Code ideas can easily be tested in the Python interactive shell, and lack of a compilation phase makes for a shorter edit/test cycle. All of these factors combine to make Python a terrific alternative to C++ and Java as a general purpose programming language. ForecastWatch.com was made possible because of the ease of programming complex tasks in Python, and the rapid development that Python allows. About the Author Eric Floehr specializes in larg...

  • PEP 103 -- Collecting information about git

    ...python.org/python.git $ cd python $ git branch v1 origin/v1 The first command clones remote repository into local directory python, creates a new local branch master, sets remotes/origin/master as its upstream remote-tracking branch and checks it out into the working directory. The last command creates a new local branch v1 and sets remotes/origin/v1 as its upstream remote-tracking branch. The same result can be achieved with commands: $ git clone -b v1 https://git.python.org/python.git $ cd p...

  • EDU-SIG: Python in Education

    ...Python. It allows Python to talk to SDL, a cross-platform, multimedia library. Because it needs to be compiled for each platform and each Python version, there can be a lag when a new Python version comes along. pyglet is the newcomer, based on OpenGL. Because it is a pure Python package, it can be used as is even when a new Python version is released (except for the Python 2 to Python 3 transition). Miscellaneous Python for secretaries: A resource site aimed at showing business users how t...

  • PEP 582 -- Python local packages directory

    ...Python executable and any script will behave. foo __pypackages__ 3.8 lib bottle myscript.py /> python foo/myscript.py sys.path[0] == 'foo' sys.path[1] == 'foo/__pypackages__/3.8/lib' cd foo foo> /usr/bin/ansible #! /usr/bin/env python3 foo> python /usr/bin/ansible foo> python myscript.py foo> python sys.path[0] == '.' sys.path[1] == './__pypackages__/3.8/lib' foo> python -m bottle We have a project directory called foo an...

  • PEP 434 -- IDLE Enhancement Exception for All Branches

    ...python.org/issue1207589) [2]Cut/Copy/Paste items in IDLE right click context menu (https://mail.python.org/pipermail/python-dev/2012-November/122514.html) [3]Getting Started with Python (http://www.python.org/about/gettingstarted/) [4]Batteries Included (http://docs.python.org/2/tutorial/stdlib.html#batteries-included) [5]IDLE breakpoint facility undocumented, Deily, Ned (http://bugs.python.org/issue10405) [6]IDLE: calltips mishandle raw strings and other examples, Reedy...

  • PEP 256 -- Docstring Processing System Framework

    ...Python lends itself to inline documentation. With its built-in docstring syntax, a limited form of Literate Programming is easy to do in Python. However, there are no satisfactory standard tools for extracting and processing Python docstrings. The lack of a standard toolset is a significant gap in Python's infrastructure; this PEP aims to fill the gap. The issues surrounding docstring processing have been contentious and difficult to resolve. This PEP proposes a generic Docstring Processing ...

  • PEP 292 -- Simpler String Substitutions

    ...Python 2.4 source tree. References [1]String Formatting Operations http://docs.python.org/library/stdtypes.html#string-formatting-operations [2]Identifiers and Keywords http://docs.python.org/reference/lexical_analysis.html#identifiers-and-keywords [3]Guido's python-dev posting from 21-Jul-2002 https://mail.python.org/pipermail/python-dev/2002-July/026397.html [4]https://mail.python.org/pipermail/python-dev/2002-June/025652.html [5]Reference Implementation http://sourcef...

  • PEP 551 -- Security transparency in the Python runtime

    ...python.exe on Windows and pythonX.Y on other platforms) allows execution from the command line, from standard input, and does not have any hooks enabled by default. Our recommendation is that production machines should use a modified entry point instead of the default. Once outside of the development environment, there is rarely a need for the flexibility offered by the default entry point. In this section, we describe a hypothetical spython entry point (spython.exe on Windows; spythonX.Y on oth...

  • Python Success Stories

    ...Python? Python was not our first choice as the main programming language it was a coincidence. When we started our project we was very proficient in Perl and completely unaware of Python: so we chose Perl. We discovered Python when we decided that we had to substitute the PerlTK user interface with a Web-based one. We found Zope, and after some attempts to integrate Perl with Zope, we switched to Python. To make a log story short, at the end we dropped Zope but kept using Python (and rewrote the...

  • 2012-04-30 PSF Board Meeting Minutes

    ...Python logo (with some permitted perspective added, as if logo was stamped on side of a crate). The kind Jonathan Hosmer <jon at pythonforios.com> with whom we worked out the name "Python for iOS" for his Python distribution (modified from the confusing iPython, which is similar to the older IPython shell) decided to offer to PSF members complimentary licenses to his distribution which I distributed to some PSF members (including Guido). FWIW, Jonathan offered more free copies t...

  • Built-in Package Support in Python 1.5

    ...python1.5/site-packages $prefix/lib/site-python The site-packages directory can be used for packages that are likely to depend on the Python version (e.g. package containing shared libraries or using new features). The site-python directory is used for backward compatibility with Python 1.4 and for pure Python packages or modules that are not sensitive to the Python version used. Recommended use of these directories is to place each package in a subdirectory of its own in either ...