Function _which

recipes/Python/577191_IP_and_MAC_addresses/recipe-577191.py:108–121

(exe, dirs)

def _which(exe, dirs):
    # return full path of an executable.
    p = _exes.get(exe, None)
    if p is None:
        for d in dirs:
            p = os.path.join(d, exe)
            if os.access(p, os.X_OK):
                break
        else:
            p = ''  # no such exe
        _exes[exe] = p
        if _debugf:
            _debugf('_which(%r): %r', exe, p)
    return p


if sys.platform.startswith('win'):