Python 3.6之如何用文字翻译电话号码

尝试让这个程序将字母翻译成数字，以便可以输入带有单词的电话号码并输出数字版本。 (1800GOTJUNK = 18004685865) 不确定我哪里出错了，但每个输出只给出最后一个字母是什么，并为所有数字重复它的数字 (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() 

请您参考如下方法:

str(transNum(phone)) 应该是 str(transNum(ch)) 而且 transNum 不需要迭代其输入，因为它只会保留最后一个数字(它被设计为将一个字母作为输入)。