This directory contains a collection of executable Python scripts that are useful while building, extending or managing Python. 2to3 Main script for running the 2to3 conversion tool checkpip.py Checks the version of the projects bundled in ensurepip are the latest available combinerefs.py A helper for analyzing PYTHONDUMPREFS output divmod_threshold.py Determine threshold for switching from longobject.c divmod to _pylong.int_divmod() idle3 Main program to start IDLE pydoc3 Python documentation browser run_tests.py Run the test suite with more sensible default options summarize_stats.py Summarize specialization stats for all files in the default stats folders var_access_benchmark.py Show relative speeds of local, nonlocal, global, and built-in access