在python中将字符串转换为元组 [英] Converting a string to a tuple in python

问题描述

好的，我有这个字符串

tc='(107, 189)'

而且我需要它是一个元组，所以我可以一次调用每个数字.

print(tc[0]) #需要输出107

先谢谢你！

解决方案

您只需要ast.literal_eval:

<预><代码>>>>从 ast 导入literal_eval>>>tc = '(107, 189)'>>>tc =literal_eval(tc)>>>tc(107, 189)>>>类型(tc)<类'元组'>>>>tc[0]107>>>类型(tc [0])<类'int'>>>>

来自文档:

<块引用>

ast.literal_eval(node_or_string)

安全地计算一个表达式节点或一个包含Python 表达式.提供的字符串或节点可能仅包含以下 Python 文字结构:字符串、数字、元组、列表、字典、布尔值和无.

Okay, I have this string

tc='(107, 189)'

and I need it to be a tuple, so I can call each number one at a time.

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

Thank you in advance!

解决方案

All you need is 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'>
>>>

From the 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.

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