_environ.py 文件源码

def set_windows_env_var(key, value):
    """Set an env var.

    Raises:
        WindowsError
    """

    if not isinstance(key, text_type):
        raise TypeError("%r not of type %r" % (key, text_type))

    if not isinstance(value, text_type):
        raise TypeError("%r not of type %r" % (value, text_type))

    status = winapi.SetEnvironmentVariableW(key, value)
    if status == 0:
        raise ctypes.WinError()