transformer.py 文件源码

def com_subscriptlist(self, primary, nodelist, assigning):
        # slicing:      simple_slicing | extended_slicing
        # simple_slicing:   primary "[" short_slice "]"
        # extended_slicing: primary "[" slice_list "]"
        # slice_list:   slice_item ("," slice_item)* [","]

        # backwards compat slice for '[i:j]'
        if len(nodelist) == 2:
            sub = nodelist[1]
            if (sub[1][0] == token.COLON or \
                            (len(sub) > 2 and sub[2][0] == token.COLON)) and \
                            sub[-1][0] != symbol.sliceop:
                return self.com_slice(primary, sub, assigning)

        subscripts = []
        for i in range(1, len(nodelist), 2):
            subscripts.append(self.com_subscript(nodelist[i]))
        return Subscript(primary, assigning, subscripts,
                         lineno=extractLineNo(nodelist))