python - 在python中将字符串转换为元组

Question

好的，我有这个字符串

tc='(107, 189)'

我需要它是一个元组，这样我就可以一次调用每个数字。

print(tc[0]) #needs to output 107

提前致谢!

Answer 1

你只需要ast.literal_eval:

>>> from ast import literal_eval
>>> tc = '(107, 189)'
>>> tc = literal_eval(tc)
>>> tc
(107, 189)
>>> type(tc)
<class 'tuple'>
>>> tc[0]
107
>>> type(tc[0])
<class 'int'>
>>>

来自docs :

ast.literal_eval(node_or_string)

Safely evaluate an expression node or a Unicode or Latin-1 encoded string containing a Python expression. The string or node provided may only consist of the following Python literal structures: strings, numbers, tuples, lists, dicts, booleans, and None.