python判斷手機号碼是否正确_Python：嘗試檢查有效的電話号碼

我正在嘗試編寫一個程式,該程式接受格式為XXX-XXX-XXXX的電話号碼,并将條目中的任何字母翻譯為相應的号碼.

現在我有了這個,如果啟動不正确,它将允許您重新輸入正确的數字,但随後它會翻譯輸入的原始數字.我該如何解決？

def main():

phone_number= input('Please enter a phone number in the format XXX-XXX-XXXX: ')

validNumber(phone_number)

translateNumber(phone_number)

def validNumber(phone_number):

for i,c in enumerate(phone_number):

if i in [3,7]:

if c != '-':

phone_number=input('Please enter a valid phone number: ')

return phone_number

elif not c.isalnum():

phone_number=input('Please enter a valid phone number: ')

return phone_number

return phone_number

def translateNumber(phone_number):

s=""

for char in phone_number:

if char is '1':

x1='1'

s= s + x1

elif char is '-':

x2='-'

s= s + x2

elif char in 'ABCabc':

x3='2'

s= s + x3

elif char in 'DEFdef':

x4='3'

s= s + x4

elif char in 'GHIghi':

x5='4'

s= s + x5

elif char in 'JKLjkl':

x6='5'

s= s + x6

elif char in 'MNOmno':

x7='6'

s= s + x7

elif char in 'PQRSpqrs':

x8='7'

s= s + x8

elif char in 'TUVtuv':

x9='8'

s= s + x9

elif char in 'WXYZwxyz':

x10='9'

s= s + x10

print(s)