check_subset.py 文件源码

def visit_Subscript(self, t):
        self(t.value)
        if isinstance(t.slice, ast.Index):
            if   isinstance(t.ctx, ast.Load):  pass
            elif isinstance(t.ctx, ast.Store): pass
            else: assert False, "Only loads and stores are supported: %r" % (t,)
            self(t.slice.value)
        else:
            assert False, "Only simple subscripts are supported: %r" % (t,)