File: //lib/python3.9/site-packages/ptyprocess/__pycache__/util.cpython-39.pyc
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aS Given a command, mode, and a PATH string, return the path which
conforms to the given mode on the PATH, or None if there is no such
file.
`mode` defaults to os.F_OK | os.X_OK. `path` defaults to the result
of os.environ.get("PATH"), or can be overridden with a custom search
path.
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