Python 3.6 - 如何使用单词翻译电话号码

Question

试图让这个程序将字母翻译成数字,这样就可以输入带有单词的电话号码并输出数字版本.(1800GOTJUNK = 18004685865)不知道我哪里出错但每个输出只给出最后一个字母的数字并重复所有数字的数字(1800adgjmptw = 18009999999).非常感谢任何帮助,谢谢.

def transNum(string):
    number = 1
    for ch in string:
        if ch.lower() in "abc":
            number = 2
        elif ch.lower() in "def":
            number = 3
        elif ch.lower() in "ghi":
            number = 4
        elif ch.lower() in "jkl":
            number = 5
        elif ch.lower() in "mno":
            number = 6
        elif ch.lower() in "pqrs":
            number = 7
        elif ch.lower() in "tuv":
            number = 8
        elif ch.lower() in "wxyz":
            number = 9
    return number


def translate(phone):
    newNum = ""
    for ch in phone:
        if ch in   ["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]:
            newNum = newNum + str(transNum(phone))
        else:
            newNum = newNum + ch
    return newNum

def main():
    phone = input("enter a phone number")
    noLetters = translate(phone)
    print("The number you entered: ", phone)
    print("Translates to: ", noLetters)

main()

Answer 1

str(transNum(phone))应该是str(transNum(ch)) 并且transNum不需要迭代它的输入,因为它只保留最后一个数字(它被设计为只有一个字母作为输入).