列表中的字符串，转换为函数 [英] String in list, into a function

问题描述

myList = ['100', 'sin(x)', '0', '1']

我从文本文件中读取了这些字符串.现在，我想从该字符串执行函数 sin(x) －我希望这是任何函数表达式对该字符串的一般解释.

I read these strings from a text file. I now want to execute the function call sin(x) from that string -- I want this to be a general interpretation of the string for any function expression.

我尝试以下操作均未成功.

I have tried the following with no success.

myList[1].replace("'", "")

我想我要问的是如何从列表中提取字符串并使用它的原始文本".

I guess what I am asking is how to pull a string from a list and use it's 'raw text' so to speak.

最终目标是要获得此功能，其中myList [1]应该变为sin(x)

The end goal is to get this function, where myList[1] should turn to sin(x)

from math import sin
def f(x):
    return myList[1]

因此，f(x)将给出此列表中sin(x)的计算值.

Thus f(x) will give the computed value of sin(x) from this list.

推荐答案

使用字典并将其存档

from math import sin
myList = ['100', 'sin(x)', '0', '1']
options = { 'sin(x)':sin }
options[myList[1]](1)
0.8414709848078965

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