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 all supported versions of Python. 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: Path | None = None, search_path: Sequence[Path] | None = None, python_executable: str | None = None, version: PythonVersion | None = None, platform: str = sys.platform, raise_on_warnings: bool = False, allow_py_files: bool = False) -> SearchContext: Returns a SearchContext, which can be used with most other functions to customize stub finding behavior. All arguments are optional and the rest of the package will use a SearchContext created with the default values if no explicit context is provided. The arguments are:

  • typeshed: The path to the typeshed directory. If not provided, the package will use the bundled version of typeshed.
  • search_path: A list of directories to search for stubs. If not provided, sys.path will be used.
  • python_executable: The path to the Python executable to be used for determining search_path.
  • version: Version of Python (as a pair, e.g., (3, 13)) to be used for interpreting sys.version_info checks in stubs.
  • platform: The platform to be used for interpreting sys.platform checks in stubs. The default is sys.platform, the platform where the library is invoked.
  • raise_on_warnings: If True, raise an exception if the parser encounters something it does not understand.
  • allow_py_files: If True, allow searching for .py files in addition to .pyi files. This is useful for typed packages that contain both stub files and regular Python files. The default is False.

• typeshed_client.get_stub_file(module_name: str, *, search_context: SearchContext | None = None) -> Path | None: Returns the path to a module's stub file. For example, get_stub_file('typing') may return Path('/path/to/typeshed/stdlib/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: SearchContext | None = None) -> NameDict | None 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: ast.AST | ImportedName | OverloadedName
    child_nodes: NameDict | None = 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, 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 2.12.0 (June 1, 2026)

• Update bundled typeshed
• Support for Python 3.12+ type alias statements

Version 2.11.0 (May 1, 2026)

• Update bundled typeshed

Version 2.10.0 (April 17, 2026)

• Update bundled typeshed
• Make tests pass with the typeshed in the PyPI tarball

Version 2.9.0 (March 1, 2026)

• Update bundled typeshed
• Add new public function evaluate_expression_truthiness
• Support single-file stub packages
• Support namespace packages

Version 2.8.2 (July 15, 2025)

• Fix package publishing pipeline

Version 2.8.1 (July 15, 2025)

• Fix package publishing pipeline

Version 2.8.0 (July 15, 2025)

• Update bundled typeshed
• Drop support for Python 3.8 and add preliminary support for Python 3.14
• Search for names and imports in .py files in addition to .pyi files
• Allow more redefinitions in stub files. OverloadedName objects can now contain ImportedName objects.
• Explicitly set encoding to UTF-8, fixing crashes on Windows in some cases.

Version 2.7.0 (July 16, 2024)

• Update bundled typeshed

Version 2.6.0 (July 12, 2024)

• Update bundled typeshed
• Support try blocks in stubs
• Declare support for Python 3.13
• Handle situations where an entry on the module search path is not accessible or does not exist
• Fix warnings due to use of deprecated AST classes

Version 2.5.1 (February 25, 2024)

• Fix packaging metadata that still incorrectly declared support for Python 3.7

Version 2.5.0 (February 25, 2024)

• Update bundled typeshed
• Drop support for Python 3.7
• typeshed_client.finder.get_search_path() is now deprecated, as it is no longer useful

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