recipe-473846.py 文件源码

def _get_reg_value(key, subkey, name):
    """Return registry value specified by key, subkey, and name.

    Environment variables in values of type REG_EXPAND_SZ are expanded
    if possible.
    """

    key = _winreg.OpenKey(key, subkey)
    try:
        ret = _winreg.QueryValueEx(key, name)
    except WindowsError:
        return None
    else:
        key.Close()
        if ret[1] == _winreg.REG_EXPAND_SZ:
            return expandvars(ret[0])
        else:
            return ret[0]