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  • Python Patterns - An Optimization Anecdote

    ...string concatenation functions in the string module that are implemented in C. In particular, string.joinfields(list_of_strings, delimiter) concatenates a list of strings, placing a delimiter of choice between each two strings. Nothing stops us from concatenating a list of characters (which are just strings of length one in Python), using the empty string as delimiter. Lo and behold: import string def f6(list): return string.joinfields(map(chr, list), "") ...

  • Release – Python 3.9.14

    Version: None

    Released: Sept. 6, 2022

    This is a security release of Python 3.9 Note: The release you're looking at is Python 3.9.14, a security bugfix release for the legacy 3.9 series. Python 3.11 is now the latest feature release series of Python 3. Get the latest release of 3.11.x here. Security content in this …

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  • Release – Python 3.8.14

    Version: None

    Released: Sept. 6, 2022

    This is a security release of Python 3.8 Note: The release you're looking at is Python 3.8.14, a security bugfix release for the legacy 3.8 series. Python 3.11 is now the latest feature release series of Python 3. Get the latest release of 3.11.x here. Security content in this …

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  • What's new in Python 2.3

    ...string - an abstract string type which is the base class for str (8-bit strings) and unicode. Primarily used to simplify tests for string-ness to isinstance(x, basestring). bool, True, False - these were introduced as ints in Python 2.2.1, but are now a separate type (a subtype of int). This means that True and False are now printed as the strings 'True' and 'False', respectively. As of 2.3b1, bool() without arguments returns False. (PEP 285) compile(), eval(), exec - fully support Unicode, a...

  • Release – Python 3.7.14

    Version: None

    Released: Sept. 6, 2022

    Note: The release you are looking at is a security bugfix release for the legacy 3.7 series which has now reached end-of-life and is no longer supported. See the downloads page for currently supported versions of Python. The final source-only security fix release for 3.7 was 3.7.17. Please see …

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  • SIG for development of Python/C++ integration

    ...algorithms to Python objects Goal: Implementation of interfaces for the application of C++ Standard Template Library algorithms and boost algorithms to Python objects, such as Python lists, tuples, strings and Python objects that support the buffer interface. Python LONG support Python provides an arbitrary-precision LONG integer type which is not currently supported by Boost.Python. Goal: Addition of an interface to Python LONGs which allows them to be direct...

  • Towards a Standard Parser Generator

    ...strings, due to its reliance on the regex module. We have not studied it further, although either a port to re, or an integration of a custom tokenizer may have been feasible. YAPPS Following the links on the String SIG page [Kuc00], we found "Yet Another Python Parser System", YAPPS, by Amit Patel. Even though the parser only supports LL(1) languages due to its recursive-descent strategy, it turned out that the XPath grammar could easily be rewritten to be acceptable using standard ...

  • Release – Python 3.14.0b3

    Version: None

    Released: June 17, 2025

    It's 3.14 beta 3! https://www.python.org/downloads/release/python-3140b3/ This is a beta preview of Python 3.14 Python 3.14 is still in development. This release, 3.14.0b3, is the third of four planned beta releases. Beta release previews are intended to give the wider community the opportunity to test new features and bug fixes and …

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  • Unifying types and classes in Python 2.2

    ...string[, base_number]]) long([number_or_string]) float([number_or_string]) complex([number_or_string[, imag_number]]) str([object]) unicode([string[, encoding_string]]) tuple([iterable]) list([iterable]) type(object) or type(name_string, bases_tuple, methods_dict) The signature of type() requires an explanation: traditionally, type(x) returns the type of object x, and this usage is still supported. However, type(name, bases, methods) is a new usage that creates...

  • Unifying types and classes in Python 2.2

    ...string[, base_number]]) long([number_or_string]) float([number_or_string]) complex([number_or_string[, imag_number]]) str([object]) unicode([string[, encoding_string]]) tuple([iterable]) list([iterable]) type(object) or type(name_string, bases_tuple, methods_dict) The signature of type() requires an explanation: traditionally, type(x) returns the type of object x, and this usage is still supported. However, type(name, bases, methods) is a new usage that creates...

  • Unifying types and classes in Python 2.2

    ...string[, base_number]]) long([number_or_string]) float([number_or_string]) complex([number_or_string[, imag_number]]) str([object]) unicode([string[, encoding_string]]) tuple([iterable]) list([iterable]) type(object) or type(name_string, bases_tuple, methods_dict) The signature of type() requires an explanation: traditionally, type(x) returns the type of object x, and this usage is still supported. However, type(name, bases, methods) is a new usage that creates...

  • Release – Python 3.14.0rc1

    Version: None

    Released: July 22, 2025

    It's the first 3.14 release candidate! https://www.python.org/downloads/release/python-3140rc1/ This is the first release candidate of Python 3.14 This release, 3.14.0rc1, is the penultimate release preview. Entering the release candidate phase, only reviewed code changes which are clear bug fixes are allowed between this release candidate and the final release. The …

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  • Release – Python 3.4.0

    Version: None

    Released: March 17, 2014

    Python 3.4.0 Python 3.4 has reached end-of-life. Python 3.4.10, the final release of the 3.4 series, is available here. Python 3.4.0 was released on March 16th, 2014. Major new features of the 3.4 series, compared to 3.3 Python 3.4 includes a range of improvements of the 3.x series, including hundreds …

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  • Release – Python 2.3.0

    Version: None

    Released: July 29, 2003

    This is a patch release which supersedes earlier releases of 2.3. Important: This release is vulnerable to the problem described in security advisory PSF-2006-001 "Buffer overrun in repr() of unicode strings in wide unicode builds (UCS-4)". This fix is included in Python 2.4.4 and Python 2.5. If you need …

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  • Release – Python 3.4.5

    Version: None

    Released: June 27, 2016

    Python 3.4 has reached end-of-life. Python 3.4.10, the final release of the 3.4 series, is available here. Python 3.4.5 was released on June 26th, 2016. Python 3.4 has now entered "security fixes only" mode, and as such the only improvements between Python 3.4.4 and Python 3.4.5 are security fixes. Also, …

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  • Release – Python 3.4.6rc1

    Version: None

    Released: Jan. 3, 2017

    Python 3.4 has reached end-of-life. Python 3.4.10, the final release of the 3.4 series, is available here. Python 3.4.6 release candidate 1 was released on January 2nd, 2017. Python 3.4 has now entered "security fixes only" mode, and as such the only improvements between Python 3.4.4 and Python 3.4.5 are …

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  • Release – Python 3.4.6

    Version: None

    Released: Jan. 17, 2017

    Python 3.4 has reached end-of-life. Python 3.4.10, the final release of the 3.4 series, is available here. Python 3.4.6 was released on January 17th, 2017. Python 3.4 has now entered "security fixes only" mode, and as such the only improvements between Python 3.4.4 and Python 3.4.5 are security fixes. Also, …

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  • Release – Python 3.4.7rc1

    Version: None

    Released: July 25, 2017

    Python 3.4 has reached end-of-life. Python 3.4.10, the final release of the 3.4 series, is available here. Python 3.4.7rc1 was released on July 25th, 2017. Python 3.4 has now entered "security fixes only" mode, and as such the only improvements between Python 3.4.6 and Python 3.4.7 are security fixes. Also, …

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  • Release – Python 3.4.7

    Version: None

    Released: Aug. 9, 2017

    Python 3.4 has reached end-of-life. Python 3.4.10, the final release of the 3.4 series, is available here. Python 3.4.7 was released on August 9th, 2017. Python 3.4 has now entered "security fixes only" mode, and as such the only improvements between Python 3.4.6 and Python 3.4.7 are security fixes. Also, …

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  • Release – Python 3.4.8rc1

    Version: None

    Released: Jan. 23, 2018

    Python 3.4 has reached end-of-life. Python 3.4.10, the final release of the 3.4 series, is available here. Python 3.4.8rc1 was released on January 23rd, 2018. Python 3.4 has now entered "security fixes only" mode, and as such the only improvements between Python 3.4.7 and Python 3.4.8rc1 are security fixes. Also, …

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