Python中的字符串字符转换为数字的分配作业

Question

下午好， 我在尝试运行这批代码时遇到了一些问题，这些代码涉及将字符串中的单个字母字符转换为数字。字母表中的特定字母按顺序划分为不同的分组，如代码中所示

以下是我目前掌握的情况：

def main():

    gSNumberConversion()

def gSNumberConversion():

   phoneNum = input('Please Enter the number in the format of XXX-XXX-XXXX\n:')

   phoneNum = phoneNum.split('-')

   for var in phoneNum[1:2]:

       for char in var:
        if char == 'A' or char == 'B' or char == 'C':
            char = '2'
        elif char == 'D' or char == 'E' or char == 'F':
            char = '3'
        elif char == 'G' or char == 'H' or char == 'I':
            char = '4'
        elif char == 'J' or char == 'K' or char == 'L':
            char = '5'
        elif char == 'M' or char == 'N' or char == 'O':
            char = '6'
        elif char == 'P' or char == 'Q' or char == 'R' or char == 'S':
            char = '7'
        elif char == 'T' or char == 'U' or char == 'V':
            char = '8'
        elif char == 'W' or char == 'X' or char == 'Y' or char == 'Z':
            char = '9'

            print(phoneNum)

main()

该代码应该在一个电话号码中运行，该号码中隐藏了一个小短语，例如“555-GET-FOOD”，并返回其数字等价物。当输入确实通过时，程序不会返回数字替换的版本

Answer 1

字符串是不可变的，您必须创建一个新变量并将结果添加到其中

newPhoneNum="" #new empty variable to add the result to
var = phoneNum[1:2] #extract the part of the phone that you will use


for index in len(var)):
        if var[index] == 'A' or var[index] == 'B' or var[index] == 'C':
            newPhoneNum+='2'
        .
        .  
        etc 
        print(phoneNum[0]+newPhoneNum)