Django Python词典理解给出语法错误 [英] Django Python Dictionary comprehension giving syntax error

问题描述

我在Django应用程序中使用了字典理解功能(也在django shell中尝试过)，但是给出了语法错误.这是示例代码.

I was using dictionary comprehension in my Django app (tried in django shell as well) but is giving a syntax error. Here is a sample code.

>>> first_dict = {'a':1, 'b':2}
>>> second_dict = {}
>>> second_dict = {key: value for key, value in first_dict.iteritems()}
  File "<console>", line 1
second_dict = {key: value for key, value in first_dict.iteritems()}
                            ^

是的，下面显示的是^.

Yes, it is showing a ^ below for.

如果我在django外壳之外尝试相同的操作，则在常规python外壳上可以正常工作.

If I try the same outside the django shell, on a regular python shell, it works.

>>> first_dict = {'a':1, 'b':2}
>>> second_dict = {}
>>> second_dict = {key: value for key, value in first_dict.iteritems()}
>>> second_dict
{'a': 1, 'b': 2}

如果我使用迭代而不是字典理解，那么它将在Django中工作.这是预期的，还是我做错了什么?

If I use iteration instead of dictionary comprehension, it works in django. Is this expected, or am I doing something wrong?

推荐答案

词典理解仅在2.7+版本的Python中有效，并且看来您在Django的较早版本下运行.

Dictionary comprehensions are only in Python versions 2.7+, and it seems you are running Django under an earlier version.

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