Updates about mypy, an optional static type checker for Python We’ve just uploaded mypy 0.501 to PyPI. This release adds new features, bug fixes and library stub updates. You can install it as follows: python3 -m pip install --upgrade mypy Note: Remember that the package name is now mypy (no longer mypy-lang). Switch to New Parser Mypy now uses the typed_ast parser by default, which is more correc