column.py 文件源码

def _wrap(self, i):
    if not inspect.ismethod(i):
        return i

    # create a wrapper function
    # that hijacks any ColumnValueMixins
    def _wrapper(*args, **kwargs):
        result = i(*args, **kwargs)

        if not isinstance(result, md_operators.ColumnValueMixin):
            return result

        result.column = self
        return result

    return _wrapper