如何将元组字符串数组转换为元组数组？

Question

我的情况是我试图将字符串格式的元组数组转换为元组数组。

即。我想从：

['(-109.080842,45.002073)','(-105.91517,45.002073)','(-109.080842,45.002073)']

到

[(-109.080842,45.002073),(-105.91517,45.002073),(-109.080842,45.002073)]

这样做的目的是能够创建一个匀称的多边形。当元组是一个字符串时，它会抛出一个错误。从字符串到实际元组对象的最佳方法是什么？

Answer 1

他们是文字，所以你可以安全地评估它们：

>>> import ast
>>> L = ['(-109.080842,45.002073)','(-105.91517,45.002073)','(-109.080842,45.002073)']
>>> [ast.literal_eval(x) for x in L]
[(-109.080842, 45.002073), (-105.91517, 45.002073), (-109.080842, 45.002073)]

Answer 2

这是ast.literal_eval的功能方式：

from ast import literal_eval

lst = ['(-109.080842,45.002073)','(-105.91517,45.002073)','(-109.080842,45.002073)']

res = list(map(literal_eval, lst))

# [(-109.080842, 45.002073), (-105.91517, 45.002073), (-109.080842, 45.002073)]