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
Python Format-Spec Mini Language
Escaping of Input Variables
Environment Access and Command Substitution
Extensible String Prefixes
...Python (download from the SourceForge
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 215: String Interpolation
PEP 292: Simpler String Substitutions
PEP 3101: Advanced String Formatting
PEP 498: Literal string formatting
...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...
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,...
...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
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,
...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'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...
$ 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...
...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.
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
Python for secretaries:
A resource site aimed at showing business users how t...
...Python executable and any script will behave.
/> python foo/myscript.py
sys.path == 'foo'
sys.path == 'foo/__pypackages__/3.8/lib'
#! /usr/bin/env python3
foo> python /usr/bin/ansible
foo> python myscript.py
sys.path == '.'
sys.path == './__pypackages__/3.8/lib'
foo> python -m bottle
We have a project directory called foo an...
Cut/Copy/Paste items in IDLE right click context menu
Getting Started with Python
IDLE breakpoint facility undocumented, Deily, Ned
IDLE: calltips mishandle raw strings and other examples,
...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
...Python 2.4 source tree.
String Formatting Operations
Identifiers and Keywords
Guido's python-dev posting from 21-Jul-2002
...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
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 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...
...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...
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
Recommended use of these directories is to place each package in a
subdirectory of its own in either ...