3.8. Type Annotation Validate

3.8.1. MyPy

• Type Checking

• http://mypy-lang.org/

• https://github.com/python/mypy

$ pip install mypy
$ mypy FILE

setup.cfg

[mypy]
strict_optional = True

3.8.2. PyType

• Type Checking

• https://github.com/google/pytype

$ pip install pytype
$ pytype -V 3.9 myfile.py

3.8.3. Pyre-check

• Type Checking