_assertionnew.py 文件源码

def visit_Assign(self, assign):
        value_explanation, value_result = self.visit(assign.value)
        explanation = "... = %s" % (value_explanation,)
        name = ast.Name("__exprinfo_expr", ast.Load(),
                        lineno=assign.value.lineno,
                        col_offset=assign.value.col_offset)
        new_assign = ast.Assign(assign.targets, name, lineno=assign.lineno,
                                col_offset=assign.col_offset)
        mod = ast.Module([new_assign])
        co = self._compile(mod, "exec")
        try:
            self.frame.exec_(co, __exprinfo_expr=value_result)
        except Exception:
            raise Failure(explanation)
        return explanation, value_result