将python字符串列表转换为它们的类型 [英] converting python list of strings to their type

问题描述

给出了python字符串列表，如何自动将其转换为正确的类型?意思是，如果我有:

given a list of python strings, how can I automatically convert them to their correct type? Meaning, if I have:

["hello", "3", "3.64", "-1"]

我希望将其转换为列表

["hello", 3, 3.64, -1]  

其中第一个元素是stuntng，第二个元素是int，第三个元素是float，第四个元素是int.

where the first element is a stirng, the second an int, the third a float and the fourth an int.

我该怎么做?谢谢.

推荐答案

import ast

L = ["hello", "3", "3.64", "-1"]

def tryeval(val):
  try:
    val = ast.literal_eval(val)
  except ValueError:
    pass
  return val

print [tryeval(x) for x in L]

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