求助:__file__的路径显示不同问题

加上引号，os.path.realpath里面的值是一个字符串，如果不加引号，__file__是当前运行文件的fullname

os.path.realpath的源码如下：

os.path.realpath

Type: <type 'function'>

Value: <function abspath at 0x015D3C70>

Docstring:

"""Return the absolute version of a path."""

Source Code:

    def abspath(path):
        """Return the absolute version of a path."""

        if path: # Empty path must return current working directory.
            try:
                path = _getfullpathname(path)
            except WindowsError:
                pass # Bad path - return unchanged.
        elif isinstance(path, unicode):
            path = os.getcwdu()
        else:
            path = os.getcwd()
        return normpath(path)