support.py 文件源码

def get_tk_patchlevel():
    global _tk_patchlevel
    if _tk_patchlevel is None:
        tcl = tkinter.Tcl()
        patchlevel = tcl.call('info', 'patchlevel')
        m = re.fullmatch(r'(\d+)\.(\d+)([ab.])(\d+)', patchlevel)
        major, minor, releaselevel, serial = m.groups()
        major, minor, serial = int(major), int(minor), int(serial)
        releaselevel = {'a': 'alpha', 'b': 'beta', '.': 'final'}[releaselevel]
        if releaselevel == 'final':
            _tk_patchlevel = major, minor, serial, releaselevel, 0
        else:
            _tk_patchlevel = major, minor, 0, releaselevel, serial
    return _tk_patchlevel