normpath.py 文件源码

def join(self, other):
        """join other normsubpath inplace

        Both normpaths must contain at least one normsubpath.
        The last normsubpath of self will be joined to the first
        normsubpath of other.
        """
        other = other.normpath()

        if not self.normsubpaths:
            raise NormpathException("cannot join to empty path")
        if not other.normsubpaths:
            raise PathException("cannot join empty path")
        self.normsubpaths[-1].join(other.normsubpaths[0])
        self.normsubpaths.extend(other.normsubpaths[1:])