如何将字符串中的元组转换为元组对象？

In Python 2.7, I have the following string:

在Python 2.7中,我有以下字符串:

"((1, u'Central Plant 1', u'http://egauge.com/'),
(2, u'Central Plant 2', u'http://egauge2.com/'))"

How can I convert this string back to tuples? I've tried to use split a few times but it's very messy and makes a list instead.

如何将此字符串转换回元组?我试过使用拆分几次,但它非常凌乱,而是制作一个列表。

Desired output:

((1, 'Central Plant 1', 'http://egauge.com/'),
(2, 'Central Plant 2', 'http://egauge2.com/'))

Thanks for the help in advance!

我在这里先向您的帮助表示感谢!

3 个解决方案

#1

You should use the literal_eval method from the ast module which you can read more about here.

您应该使用ast模块中的literal_eval方法,您可以在这里阅读更多信息。

>>> import ast
>>> s = "((1, u'Central Plant 1', u'http://egauge.com/'),(2, u'Central Plant 2', u'http://egauge2.com/'))"
>>> ast.literal_eval(s)
((1, u'Central Plant 1', u'http://egauge.com/'), (2, u'Central Plant 2', u'http://egauge2.com/'))

#2

ast.literal_eval should do the trick—safely.

ast.literal_eval应该安全地进行操作。

E.G.

>>> ast.literal_eval("((1, u'Central Plant 1', u'http://egauge.com/'),
... (2, u'Central Plant 2', u'http://egauge2.com/'))")
((1, u'Central Plant 1', u'http://egauge.com/'), (2, u'Central Plant 2', u'http://egauge2.com/'))

See this answer for more info on why not to use eval.

有关为何不使用eval的详细信息,请参阅此答案。

#3

Using eval:

s="((1, u'Central Plant 1', u'http://egauge.com/'), (2, u'Central Plant 2', u'http://egauge2.com/'))"
p=eval(s)
print p

#1