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https://peps.python.org/pep-0818/ PEP 818 – Adding the Core of the Pyodide Foreign Function Interface to Python | peps.python.org Pyodide is a distribution of Python for JavaScript runtimes, including browsers. Browsers are a universal computing platform. As with C for Unix family... foreign function interface python peps 818 adding core https://peps.python.org/pep-2026/ PEP 2026 – Calendar versioning for Python | peps.python.org This PEP proposes updating the versioning scheme for Python to include the calendar year. calendar versioning python peps 2026 https://peps.python.org/pep-0543/ PEP 543 – A Unified TLS API for Python | peps.python.org This PEP would define a standard TLS interface in the form of a collection of abstract base classes. This interface would allow Python implementations and... python peps 543 unified tls api https://peps.python.org/pep-0020/ PEP 20 – The Zen of Python | peps.python.org Long time Pythoneer Tim Peters succinctly channels the BDFL’s guiding principles for Python’s design into 20 aphorisms, only 19 of which have been written down. python peps 20 zen https://peps.python.org/pep-0411/ PEP 411 – Provisional packages in the Python standard library | peps.python.org The process of including a new package into the Python standard library is hindered by the API lock-in and promise of backward compatibility implied by a... python standard library pep 411 provisional packages https://peps.python.org/pep-0249/ PEP 249 – Python Database API Specification v2.0 | peps.python.org This API has been defined to encourage similarity between the Python modules that are used to access databases. By doing this, we hope to achieve a consistency... specification v2 0 python database pep 249 api https://peps.python.org/pep-0607/ PEP 607 – Reducing CPython’s Feature Delivery Latency | peps.python.org PEP 602 and PEP 605 describe two alternative approaches to delivering smaller collections of features to Python’s users more frequently (as compared to the... feature delivery peps python 607 reducing latency https://peps.python.org/pep-0810/ PEP 810 – Explicit lazy imports | peps.python.org This PEP introduces syntax for lazy imports as an explicit language feature: lazy imports peps python 810 explicit https://peps.python.org/pep-0609/ PEP 609 – Python Packaging Authority (PyPA) Governance | peps.python.org This document describes a governance model for the Python Packaging Authority (PyPA). The model is closely based on existing informal practices, with the... python packaging pep 609 authority pypa https://peps.python.org/pep-0800/ PEP 800 – Disjoint bases in the type system | peps.python.org To analyze Python programs precisely, type checkers need to know when two classes can and cannot have a common child class. However, the information necessary... type system peps python 800 disjoint bases https://peps.python.org/pep-0709/ PEP 709 – Inlined comprehensions | peps.python.org Comprehensions are currently compiled as nested functions, which provides isolation of the comprehension’s iteration variable, but is inefficient at runtime.... peps python 709 inlined comprehensions https://peps.python.org/pep-0513/ PEP 513 – A Platform Tag for Portable Linux Built Distributions | peps.python.org This PEP proposes the creation of a new platform tag for Python package built distributions, such as wheels, called manylinux1_{x86_64,i686} with external... distributions peps python platform tag portable linux 513 built https://peps.python.org/pep-0349/ PEP 349 – Allow str() to return unicode strings | peps.python.org This PEP proposes to change the str() built-in function so that it can return unicode strings. This change would make it easier to write code that works with... peps python 349 allow str return https://peps.python.org/pep-0262/ PEP 262 – A Database of Installed Python Packages | peps.python.org This PEP describes a format for a database of the Python software installed on a system. python packages pep 262 database installed https://peps.python.org/pep-3111/ PEP 3111 – Simple input built-in in Python 3000 | peps.python.org Input and output are core features of computer programs. Currently, Python provides a simple means of output through the print keyword and two simple means of... python 3000 peps 3111 simple input built https://peps.python.org/pep-3131/ PEP 3131 – Supporting Non-ASCII Identifiers | peps.python.org This PEP suggests to support non-ASCII letters (such as accented characters, Cyrillic, Greek, Kanji, etc.) in Python identifiers. supporting non peps python 3131 ascii identifiers https://peps.python.org/pep-0484/ PEP 484 – Type Hints | peps.python.org PEP 3107 introduced syntax for function annotations, but the semantics were deliberately left undefined. There has now been enough 3rd party usage for static... type hints peps 484 python https://peps.python.org/pep-0723/ PEP 723 – Inline script metadata | peps.python.org This PEP specifies a metadata format that can be embedded in single-file Python scripts to assist launchers, IDEs and other external tools which may need to... script metadata peps python 723 inline https://peps.python.org/pep-0612/ PEP 612 – Parameter Specification Variables | peps.python.org There currently are two ways to specify the type of a callable, the Callable[[int, str], bool] syntax defined in PEP 484, and callback protocols from PEP 544.... peps python 612 parameter specification variables https://peps.python.org/pep-3129/ PEP 3129 – Class Decorators | peps.python.org This PEP proposes class decorators, an extension to the function and method decorators introduced in PEP 318. peps python 3129 class decorators https://peps.pythondiscord.com/pep-0477/ PEP 477 – Backport ensurepip (PEP 453) to Python 2.7 | peps.pythondiscord.com Python Enhancement Proposals (PEPs) python 2 7 peps pythondiscord 477 backport 453 https://peps.python.org/pep-0589/ PEP 589 – TypedDict: Type Hints for Dictionaries with a Fixed Set of Keys | peps.python.org PEP 484 defines the type Dict[K, V] for uniform dictionaries, where each value has the same type, and arbitrary key values are supported. It doesn’t properly... type hints peps python 589 typeddict dictionaries https://peps.python.org/pep-0414/ PEP 414 – Explicit Unicode Literal for Python 3.3 | peps.python.org This document proposes the reintegration of an explicit unicode literal from Python 2.x to the Python 3.x language specification, in order to reduce the volume... python 3 pep 414 explicit unicode https://peps.pythondiscord.com/pep-3138/ PEP 3138 – String representation in Python 3000 | peps.pythondiscord.com Python Enhancement Proposals (PEPs) python 3000 peps 3138 string representation pythondiscord https://discuss.python.org/t/pep-779-criteria-for-supported-status-for-free-threaded-python/84319/123 PEP 779: Criteria for supported status for free-threaded Python - #123 by corona10 - PEPs -... As you may remember, PEP 703 (Making the Global Interpreter Lock Optional in CPython) was accepted for Python 3.13, as an explicitly experimental feature. The... supported status free threaded pep 779 criteria https://peps.python.org/pep-0807/ PEP 807 – Index support for Trusted Publishing | peps.python.org This PEP proposes a standard mechanism through which arbitrary Python package indices can support “Trusted Publishing,” a misuse-resistant credential exchange... index support trusted publishing peps python 807 https://peps.python.org/pep-0482/ PEP 482 – Literature Overview for Type Hints | peps.python.org This PEP is one of three related to type hinting. This PEP gives a literature overview of related work. The main spec is PEP 484. type hints peps 482 literature overview python https://peps.python.org/pep-0311/ PEP 311 – Simplified Global Interpreter Lock Acquisition for Extensions | peps.python.org This PEP proposes a simplified API for access to the Global Interpreter Lock (GIL) for Python extension modules. Specifically, it provides a solution for... global interpreter lock peps python 311 simplified acquisition https://peps.python.org/pep-0649/ PEP 649 – Deferred Evaluation Of Annotations Using Descriptors | peps.python.org Annotations are a Python technology that allows expressing type information and other metadata about Python functions, classes, and modules. But Python’s... peps python 649 deferred evaluation annotations https://peps.python.org/pep-0453/ PEP 453 – Explicit bootstrapping of pip in Python installations | peps.python.org This PEP proposes that the Installing Python Modules guide in Python 2.7, 3.3 and 3.4 be updated to officially recommend the use of pip as the default... pep 453 explicit bootstrapping pip https://peps.python.org/pep-0403/ PEP 403 – General purpose decorator clause (aka “@in” clause) | peps.python.org This PEP proposes the addition of a new @in decorator clause that makes it possible to override the name binding step of a function or class definition. general purpose peps python 403 decorator clause https://peps.python.org/pep-0706/ PEP 706 – Filter for tarfile.extractall | peps.python.org The extraction methods in tarfile gain a filter argument, which allows rejecting files or modifying metadata as the archive is extracted. Three built-in named... peps python 706 filter https://peps.python.org/pep-0360/ PEP 360 – Externally Maintained Packages | peps.python.org There are many great pieces of Python software developed outside of the Python standard library (a.k.a., the “stdlib”). Sometimes it makes sense to incorporate... packages peps 360 externally maintained python https://peps.python.org/pep-0647/ PEP 647 – User-Defined Type Guards | peps.python.org This PEP specifies a way for programs to influence conditional type narrowing employed by a type checker based on runtime checks. user defined peps python 647 type guards https://peps.python.org/pep-0257/ PEP 257 – Docstring Conventions | peps.python.org This PEP documents the semantics and conventions associated with Python docstrings. peps python 257 docstring conventions https://peps.python.org/pep-0660/ PEP 660 – Editable installs for pyproject.toml based builds (wheel based) | peps.python.org This document describes a PEP 517 style method for the installation of packages in editable mode. pyproject toml peps python 660 editable installs https://peps.python.org/pep-0780/ PEP 780 – ABI features as environment markers | peps.python.org This PEP defines using ABI features as environment markers for project dependencies, through a new sys_abi_features environment marker. PEP 508 (later moved to... peps python 780 abi features environment https://peps.python.org/pep-0394/ PEP 394 – The “python” Command on Unix-Like Systems | peps.python.org This PEP outlines the behavior of Python scripts when the python command is invoked. Depending on a distribution or system configuration, python may or may not... unix like peps python 394 command systems https://peps.python.org/pep-0425/ PEP 425 – Compatibility Tags for Built Distributions | peps.python.org This PEP specifies a tagging system to indicate with which versions of Python a built or binary distribution is compatible. A set of three tags indicate which... distributions peps python 425 compatibility tags built https://peps.python.org/pep-3107/ PEP 3107 – Function Annotations | peps.python.org This PEP introduces a syntax for adding arbitrary metadata annotations to Python functions 1. annotations peps python 3107 function https://peps.python.org/pep-0813/ PEP 813 – The Pretty Print Protocol | peps.python.org This PEP describes the “pretty print protocol”, a collection of changes proposed to make pretty printing more customizable and convenient. pretty print protocol peps 813 python https://peps.pythondiscord.com/ PEP 0 – Index of Python Enhancement Proposals (PEPs) | peps.pythondiscord.com Python Enhancement Proposals (PEPs) enhancement proposals peps pythondiscord 0 index https://peps.python.org/pep-3101/ PEP 3101 – Advanced String Formatting | peps.python.org This PEP proposes a new system for built-in string formatting operations, intended as a replacement for the existing ‘%’ string formatting operator. string formatting peps python 3101 advanced https://peps.python.org/pep-0325/ PEP 325 – Resource-Release Support for Generators | peps.python.org Generators allow for natural coding and abstraction of traversal over data. Currently if external resources needing proper timely release are involved,... peps python 325 resource release support https://peps.python.org/pep-0492/ PEP 492 – Coroutines with async and await syntax | peps.python.org The growth of Internet and general connectivity has triggered the proportionate need for responsive and scalable code. This proposal aims to answer that need... peps python 492 coroutines async await https://peps.python.org/pep-3143/ PEP 3143 – Standard daemon process library | peps.python.org Writing a program to become a well-behaved Unix daemon is somewhat complex and tricky to get right, yet the steps are largely similar for any daemon regardless... library peps python 3143 standard daemon process https://peps.python.org/pep-0580/ PEP 580 – The C call protocol | peps.python.org A new “C call” protocol is proposed. It is meant for classes representing functions or methods which need to implement fast calling. The goal is to generalize... protocol peps 580 call python https://peps.python.org/pep-0553/ PEP 553 – Built-in breakpoint() | peps.python.org This PEP proposes adding a new built-in function called breakpoint() which enters a Python debugger at the point of the call. Additionally, two new names are... peps python 553 built breakpoint https://peps.python.org/pep-0302/ PEP 302 – New Import Hooks | peps.python.org This PEP proposes to add a new set of import hooks that offer better customization of the Python import mechanism. Contrary to the current __import__ hook, a... new import peps python 302 hooks https://peps.python.org/pep-0658/ PEP 658 – Serve Distribution Metadata in the Simple Repository API | peps.python.org This PEP proposes adding an anchor tag to expose the METADATA file from distributions in the PEP 503 “simple” repository API. A data-dist-info-metadata... repository api peps python 658 serve distribution https://peps.python.org/pep-0554/ PEP 554 – Multiple Interpreters in the Stdlib | peps.python.org CPython has supported multiple interpreters in the same process (AKA “subinterpreters”) since version 1.5 (1997). The feature has been available via the C-API.... peps python 554 multiple interpreters stdlib https://peps.python.org/pep-0804/ PEP 804 – An external dependency registry and name mapping mechanism | peps.python.org This PEP specifies a name mapping mechanism that allows packaging tools to map external dependency identifiers (as introduced in PEP 725) to their counterparts... peps python 804 external dependency registry https://peps.python.org/pep-0585/ PEP 585 – Type Hinting Generics In Standard Collections | peps.python.org Static typing as defined by PEPs 484, 526, 544, 560, and 563 was built incrementally on top of the existing Python runtime and constrained by existing syntax... collections peps 585 type hinting generics https://peps.python.org/pep-0011/ PEP 11 – CPython platform support | peps.python.org This PEP documents how an operating system (platform) becomes supported in CPython, what platforms are currently supported, and documents past support. platform support peps python 11 cpython https://peps.python.org/pep-0207/ PEP 207 – Rich Comparisons | peps.python.org This PEP proposes several new features for comparisons: peps python 207 rich comparisons https://peps.python.org/pep-0735/ PEP 735 – Dependency Groups in pyproject.toml | peps.python.org This PEP specifies a mechanism for storing package requirements in pyproject.toml files such that they are not included in any built distribution of the... dependency groups pyproject toml peps python 735 https://peps.python.org/pep-0742/ PEP 742 – Narrowing types with TypeIs | peps.python.org This PEP proposes a new special form, TypeIs, to allow annotating functions that can be used to narrow the type of a value, similar to the builtin... peps python 742 narrowing types https://peps.python.org/pep-0703/ PEP 703 – Making the Global Interpreter Lock Optional in CPython | peps.python.org CPython’s global interpreter lock (“GIL”) prevents multiple threads from executing Python code at the same time. The GIL is an obstacle to using multi-core... global interpreter lock cpython peps 703 making optional https://peps.python.org/pep-0241/ PEP 241 – Metadata for Python Software Packages | peps.python.org This PEP describes a mechanism for adding metadata to Python packages. It includes specifics of the field names, and their semantics and usage. python software packages pep 241 metadata https://peps.pythondiscord.com/pep-0330/ PEP 330 – Python Bytecode Verification | peps.pythondiscord.com Python Enhancement Proposals (PEPs) python bytecode peps pythondiscord 330 verification https://peps.python.org/pep-0264/ PEP 264 – Future statements in simulated shells | peps.python.org As noted in PEP 236, there is no clear way for “simulated interactive shells” to simulate the behaviour of __future__ statements in “real” interactive shells,... peps python 264 future statements simulated https://peps.python.org/pep-0659/ PEP 659 – Specializing Adaptive Interpreter | peps.python.org In order to perform well, virtual machines for dynamic languages must specialize the code that they execute to the types and values in the program being run.... peps python 659 specializing adaptive interpreter https://peps.python.org/pep-0571/ PEP 571 – The manylinux2010 Platform Tag | peps.python.org This PEP proposes the creation of a manylinux2010 platform tag to succeed the manylinux1 tag introduced by PEP 513. It also proposes that PyPI and pip both be... platform tag peps python 571 https://peps.python.org/pep-0383/ PEP 383 – Non-decodable Bytes in System Character Interfaces | peps.python.org File names, environment variables, and command line arguments are defined as being character data in POSIX; the C APIs however allow passing arbitrary bytes -... peps python 383 non decodable bytes https://peps.python.org/pep-0448/ PEP 448 – Additional Unpacking Generalizations | peps.python.org This PEP proposes extended usages of the * iterable unpacking operator and ** dictionary unpacking operators to allow unpacking in more positions, an arbitrary... peps python 448 additional unpacking https://peps.python.org/pep-0225/ PEP 225 – Elementwise/Objectwise Operators | peps.python.org This PEP describes a proposal to add new operators to Python which are useful for distinguishing elementwise and objectwise operations, and summarizes... peps python 225 elementwise operators https://peps.python.org/pep-0755/ PEP 755 – Implicit namespace policy for PyPI | peps.python.org This PEP codifies an implementation of PEP 752 for PyPI 1. peps python 755 implicit namespace policy https://peps.python.org/pep-0215/ PEP 215 – String Interpolation | peps.python.org This document proposes a string interpolation feature for Python to allow easier string formatting. The suggested syntax change is the introduction of a ‘$’... peps python 215 string interpolation https://peps.python.org/pep-3109/ PEP 3109 – Raising Exceptions in Python 3000 | peps.python.org This PEP introduces changes to Python’s mechanisms for raising exceptions intended to reduce both line noise and the size of the language. python 3000 peps 3109 raising exceptions https://peps.python.org/pep-0318/ PEP 318 – Decorators for Functions and Methods | peps.python.org The current method for transforming functions and methods (for instance, declaring them as a class or static method) is awkward and can lead to code that is... peps python 318 decorators functions methods https://peps.python.org/pep-0756/ PEP 756 – Add PyUnicode_Export() and PyUnicode_Import() C functions | peps.python.org Add functions to the limited C API version 3.14: peps python 756 add export import https://peps.python.org/pep-0347/ PEP 347 – Migrating the Python CVS to Subversion | peps.python.org The Python source code is currently managed in a CVS repository on sourceforge.net. This PEP proposes to move it to a Subversion repository on svn.python.org. pep 347 migrating python cvs https://peps.python.org/pep-8015/ PEP 8015 – Organization of the Python community | peps.python.org This PEP formalizes the current organization of the Python community and proposes 3 main changes: python community pep 8015 organization https://peps.python.org/pep-0667/ PEP 667 – Consistent views of namespaces | peps.python.org In early versions of Python all namespaces, whether in functions, classes or modules, were all implemented the same way: as a dictionary. peps python 667 consistent views namespaces https://peps.python.org/pep-0556/ PEP 556 – Threaded garbage collection | peps.python.org This PEP proposes a new optional mode of operation for CPython’s cyclic garbage collector (GC) where implicit (i.e. opportunistic) collections happen in a... garbage collection peps python 556 threaded https://peps.python.org/pep-0787/ PEP 787 – Safer subprocess usage using t-strings | peps.python.org PEP 750 introduced template strings (t-strings) as a generalization of f-strings, providing a way to safely handle string interpolation in various contexts.... usage using peps python 787 safer subprocess https://peps.python.org/pep-0573/ PEP 573 – Module State Access from C Extension Methods | peps.python.org This PEP proposes to add a way for CPython extension methods to access context, such as the state of the modules they are defined in. c extension peps python 573 module state https://peps.python.org/pep-0655/ PEP 655 – Marking individual TypedDict items as required or potentially-missing | peps.python.org PEP 589 defines notation for declaring a TypedDict with all required keys and notation for defining a TypedDict with all potentially-missing keys, however it... peps python 655 marking individual typeddict https://peps.pythondiscord.com/pep-0508/ PEP 508 – Dependency specification for Python Software Packages | peps.pythondiscord.com Python Enhancement Proposals (PEPs) python software packages dependency specification peps pythondiscord 508 https://peps.pythondiscord.com/pep-0426/ PEP 426 – Metadata for Python Software Packages 2.0 | peps.pythondiscord.com Python Enhancement Proposals (PEPs) python software packages 2 0 peps pythondiscord 426 metadata https://peps.python.org/pep-0000/ PEP 0 – Index of Python Enhancement Proposals (PEPs) | peps.python.org This PEP contains the index of all Python Enhancement Proposals, known as PEPs. PEP numbers are assigned by the PEP editors, and once assigned are never... enhancement proposals pep 0 index python https://peps.python.org/pep-0227/ PEP 227 – Statically Nested Scopes | peps.python.org This PEP describes the addition of statically nested scoping (lexical scoping) for Python 2.2, and as a source level option for python 2.1. In addition, Python... peps python 227 statically nested scopes https://peps.python.org/pep-0594/ PEP 594 – Removing dead batteries from the standard library | peps.python.org This PEP proposed a list of standard library modules to be removed from the standard library. The modules are mostly historic data formats (e.g. Commodore and... standard library peps 594 removing dead batteries https://peps.python.org/pep-0293/ PEP 293 – Codec Error Handling Callbacks | peps.python.org This PEP aims at extending Python’s fixed codec error handling schemes with a more flexible callback based approach. error handling peps python 293 codec callbacks https://peps.python.org/pep-0814/ PEP 814 – Add frozendict built-in type | peps.python.org A new public immutable type frozendict is added to the builtins module. type peps 814 add frozendict built https://peps.python.org/pep-0526/ PEP 526 – Syntax for Variable Annotations | peps.python.org PEP 484 introduced type hints, a.k.a. type annotations. While its main focus was function annotations, it also introduced the notion of type comments to... annotations peps python 526 syntax variable https://peps.pythondiscord.com/pep-0537/ PEP 537 – Python 3.7 Release Schedule | peps.pythondiscord.com Python Enhancement Proposals (PEPs) python 3 7 release schedule peps 537 pythondiscord https://peps.python.org/pep-0643/ PEP 643 – Metadata for Package Source Distributions | peps.python.org Python package metadata is stored in the distribution file in a standard format, defined in the Core Metadata Specification. However, for source distributions,... distributions peps python 643 metadata package source https://peps.python.org/pep-0747/ PEP 747 – Annotating Type Forms | peps.python.org Type expressions provide a standardized way to specify types in the Python type system. When a type expression is evaluated at runtime, the resulting type form... peps python 747 annotating type forms https://peps.python.org/pep-0272/ PEP 272 – API for Block Encryption Algorithms v1.0 | peps.python.org This document specifies a standard API for secret-key block encryption algorithms such as DES or Rijndael, making it easier to switch between different... v1 0 peps encryption algorithms 272 api block https://peps.python.org/pep-0248/ PEP 248 – Python Database API Specification v1.0 | peps.python.org This API has been defined to encourage similarity between the Python modules that are used to access databases. By doing this, we hope to achieve a consistency... specification v1 0 python database pep 248 api https://peps.python.org/pep-0719/ PEP 719 – Python 3.13 Release Schedule | peps.python.org This document describes the development and release schedule for Python 3.13. python 3 13 release schedule peps 719 https://peps.python.org/pep-0581/ PEP 581 – Using GitHub Issues for CPython | peps.python.org This PEP outlines the rationale for migration from Python’s issue tracker on Roundup to GitHub issues. See PEP 588 for the detailed migration plan. using github cpython peps 581 issues https://peps.pythondiscord.com/pep-0283/ PEP 283 – Python 2.3 Release Schedule | peps.pythondiscord.com Python Enhancement Proposals (PEPs) python 2 3 release schedule peps 283 pythondiscord https://peps.python.org/topic/typing/ Typing PEPs | peps.python.org peps python typing https://peps.python.org/pep-8013/ PEP 8013 – The External Council Governance Model | peps.python.org This PEP proposes a new model of Python governance based on a Council of Auditors (CoA) tasked with making final decisions for the language. It differs from... council governance peps python 8013 external model https://peps.python.org/pep-0615/ PEP 615 – Support for the IANA Time Zone Database in the Standard Library | peps.python.org This proposes adding a module, zoneinfo, to provide a concrete time zone implementation supporting the IANA time zone database. By default, zoneinfo will use... iana time zone standard library peps 615 support database https://peps.python.org/pep-0008/ PEP 8 – Style Guide for Python Code | peps.python.org This document gives coding conventions for the Python code comprising the standard library in the main Python distribution. Please see the companion... style guide python code pep 8