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chardetect is a command Chardet make for use at command line.
It's done in setup.py

entry_points={'console_scripts':
                    ['chardetect = chardet.cli.chardetect:main']})

entry_points make chardetect available at command line when do pip install chardet this work on all OS.
On Windows it will even make a .exe so chardetect.exe and place it in ‪Python37\Scripts\chardetect.exe
Setuptools doc