Project: typeshed-client

This project provides a way to retrieve information from typeshed <https://www.github.com/python/typeshed>_ and from PEP 561 <https://www.python.org/dev/peps/pep-0561/>_ stub packages.

Example use cases:

• Find the path to the stub file for a particular module.
• Find the names defined in a stub.
• Find the AST node that defines a particular name in a stub.

Projects for which typeshed_client could be useful include:

• Static analyzers that want to access typeshed annotations.
• Tools that check stubs for correctness.
• Tools that use typeshed for runtime introspection.

Installation

typeshed_client works on Python 3.7 and higher. To install it, run python3 -m pip install typeshed_client.

Finding stubs

The typeshed_client.finder module provides functions for finding stub files given a module name.

Functions provided:

• get_search_context(*, typeshed: Optional[Path] = None, search_path: Optional[Sequence[Path]] = None, python_executable: Optional[str] = None, version: Optional[PythonVersion] = None, platform: str = sys.platform) -> SearchContext: Returns a SearchContext
• typeshed_client.get_stub_file(module_name: str, *, search_context: Optional[SearchContext] = None) -> Optional[Path]: Returns the path to a module's stub in typeshed. For example, get_stub_file('typing', search_context=get_search_context(version=(2, 7))) may return Path('/path/to/typeshed/stdlib/@python2/typing.pyi'). If there is no stub for the module, returns None.
• typeshed_client.get_stub_ast has the same interface, but returns an AST object (parsed using the standard library ast module).

Collecting names from stubs

typeshed_client.parser collects the names defined in a stub. It provides:

• typeshed_client.get_stub_names(module_name: str, *, search_context: Optional[SearchContext] = None) -> Optional[NameDict] collects the names defined in a module, using the given Python version and platform. It returns a NameDict, a dictionary mapping object names defined in the module to NameInfo records.

• typeshed_client.NameInfo is a namedtuple defined as:

  .. code-block:: python

  class NameInfo(NamedTuple):
    name: str
    is_exported: bool
    ast: Union[ast3.AST, ImportedName, OverloadedName]
    child_nodes: Optional[NameDict] = None
  

  name is the object's name. is_exported indicates whether the name is a part of the stub's public interface. ast is the AST node defining the name, or a different structure if the name is imported from another module or is overloaded. For classes, child_nodes is a dictionary containing the names defined within the class.

Resolving names to their definitions

The third component of this package, typeshed_client.resolver, maps names to their definitions, even if those names are defined in other stubs.

To use the resolver, you need to instantiate the typeshed_client.Resolver class. For example, given a resolver = typeshed_client.Resolver(), you can call resolver.get_fully_qualified_name('collections.Set') to retrieve the NameInfo containing the AST node defining collections.Set in typeshed.

Changelog

Version 2.4.0 (September 29, 2023)

• Update bundled typeshed
• Declare support for Python 3.12

Version 2.3.0 (April 30, 2023)

• Update bundled typeshed
• Support __all__.append and __all__.extend

Version 2.2.0 (January 24, 2023)

• Update bundled typeshed
• Fix crash on stubs that use if MYPY
• Fix incorrect handling of import * in stubs
• Drop support for Python 3.6 (thanks to Alex Waygood)

Version 2.1.0 (November 5, 2022)

• Update bundled typeshed
• Declare support for Python 3.11
• Add typeshed_client.resolver.Module.get_dunder_all to get the contents of __all__
• Add support for __all__ += syntax
• Type check the code using mypy (thanks to Nicolas)

Version 2.0.5 (April 17, 2022)

• Update bundled typeshed

Version 2.0.4 (March 10, 2022)

• Update bundled typeshed

Version 2.0.3 (February 2, 2022)

• Update bundled typeshed

Version 2.0.2 (January 28, 2022)

• Update bundled typeshed

Version 2.0.1 (January 14, 2022)

• Update bundled typeshed

Version 2.0.0 (December 22, 2021)

• Breaking change: Use ast instead of typed_ast for parsing

Version 1.2.3 (December 12, 2021)

• Update bundled typeshed
• Remove noisy warning if a name is imported multiple times
• Fix get_all_stub_files() in Python 3 for modules that also exist in Python 2

Version 1.2.2 (December 9, 2021)

• Further fix relative import resolution

Version 1.2.1 (December 9, 2021)

• Fix bug with resolution of relative imports
• Update bundled typeshed

Version 1.2.0 (December 6, 2021)

• Support overloaded methods
• Update bundled typeshed

Version 1.1.4 (December 6, 2021)

• Updated bundled typeshed

Version 1.1.3 (November 14, 2021)

• Update bundled typeshed
• Declare support for Python 3.10
• Fix undeclared dependency on mypy_extensions

Version 1.1.2 (November 5, 2021)

• Update bundled typeshed

Version 1.1.1 (July 31, 2021)

• Update bundled typeshed
• Improve error message when encountering a duplicate name

Version 1.1.0 (June 24, 2021)

• Update bundled typeshed
• Handle missing @python2 directory
• Allow comments in VERSIONS file

Version 1.0.2 (May 5, 2021)

• Handle version ranges in typeshed VERSIONS file
• Update bundled typeshed

Version 1.0.1 (April 24, 2021)

• Update bundled typeshed

Version 1.0.0 (April 11, 2021)

• Improve docstrings

Version 1.0.0rc1 (April 11, 2021)

• Support new typeshed layout
• Support PEP 561 packages
• Bundle typeshed directly instead of relying on mypy

Version 0.4 (December 2, 2019)

• Performance improvement
• Code quality improvements

Version 0.3 (November 23, 2019)

• Update location of typeshed for newer mypy versions

Version 0.2 (May 25, 2017)

• Support using a custom typeshed directory
• Add get_all_stub_files()
• Handle from module import *
• Bug fixes

Version 0.1 (May 4, 2017)

• Initial release