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Typeshed contains external type annotations for the Python standard library and Python builtins, as well as third party packages as contributed by people external to those projects.
This data can e.g. be used for static analysis, type checking or type inference.
For information on how to use
typeshed, read below. Information for
contributors can be found in [CONTRIBUTING.md](CONTRIBUTING.md). Please read
it before submitting pull requests; do not report issues with annotations to
the project the stubs are for, but instead report them here to typeshed.
Typeshed supports Python versions 2.7 and 3.6 and up.
If you're just using mypy (or pytype or PyCharm), as opposed to
developing it, you don't need to interact with the typeshed repo at
all: a copy of standard library part of typeshed is bundled with mypy.
And type stubs for third party packages and modules you are using can
be installed from PyPI. For example, if you are using
you can install the type stubs using
$ pip install types-six types-requests
These PyPI packages follow PEP 561 and are automatically generated by typeshed internal machinery. Also starting from version 0.900 mypy will provide an option to automatically install missing type stub packages (if found on PyPI).
PyCharm, pytype etc. work in a similar way, for more details see documentation for the type-checking tool you are using.
typeshed includes a package
_typeshed as part of the standard library.
This package and its submodules contains utility types, but is not
available at runtime. For more information about how to use this package,
If you've run into behavior in the type checker that suggests the type stubs for a given library are incorrect or incomplete, we want to hear from you!
Our main forum for discussion is the project's GitHub issue tracker. This is the right place to start a discussion of any of the above or most any other topic concerning the project.
If you have general questions about typing with Python, or you need a review of your type annotations or stubs outside of typeshed, head over to our discussion forum. For less formal discussion, try the typing chat room on gitter.im. Some typeshed maintainers are almost always present; feel free to find us there and we're happy to chat. Substantive technical discussion will be directed to the issue tracker.