python使用

__name__ 如果直接运行py文件为__main__

如果是import进来是文件名称test

路径用os.path.abspath(__file__)

常量类

import sys


class _const:
    class ConstError(TypeError):
        pass

    class ConstCaseError(ConstError):
        pass

    def __setattr__(self, name, value):
        if name in self.__dict__:
            raise self.ConstError("Can't change const.%s" % name)

        if not name.isupper():
            raise self.ConstCaseError(
                "const name '%s' is not all uppercase" % name)
        self.__dict__[name] = value

    def __delattr__(self, name):
        if name in self.__dict__:
            raise self.ConstError("can't unbind const(%s)" % name)
        raise NameError(name)


sys.modules[__name__] = _const()