What is this Python project?

mypy uses type hints in code to warn about possible type errors before running the code.

What's the difference between this Python project and similar ones?

• This tool is unique in its ability to detect error that could be only caught during run-time.
• Package is maintained by Dropbox team with Guido van Rossum
• Type hints are introduced in Python 3.5 as official part of the language, making this package stand out.

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Anyone who agrees with this pull request could vote for it by adding a 👍 to it, and usually, the maintainer will merge it when votes reach 20.