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Python stub file generator.

Project description

Copyright (C) 2016-2019 H. Turgut Uyar <>

pygenstub is a utility for generating stub files from docstrings in source files. It takes a source file as input and creates a stub file with the same base name and the .pyi extension.


If the docstring of a function includes a sig field, the value of that field will be used to generate a prototype by matching the types to the parameters in the same order. For example, for the code given below:

def foo(a, b):
    """Do foo.

    :sig: (int, str) -> None

pygenstub will generate the following stub:

def foo(a: int, b: str) -> None: ...

pygenstub consists of a single module which itself contains signatures. You can see the source code and the autogenerated stub file as an example.


pygenstub has been tested with Python 2.7, Python 3.4+, and compatible versions of PyPy. You can install the latest version using pip:

pip install pygenstub

Installation creates a script named pygenstub which can be used as follows:


This command will generate the file foo.pyi in the same directory as the input file. If the output file already exists, it will be overwritten.

Sphinx autodoc support

If pygenstub is activated as a Sphinx extension (after autodoc), it will insert type comments for parameters and return values in the docstring. It will also remove the signature fields to exclude them from the output:

extensions = [

As an example of the output, you can see the API documentation for pygenstub itself.

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pygenstub-1.2.2-py2.py3-none-any.whl (98.9 kB) Copy SHA256 hash SHA256 Wheel py2.py3
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