在python 2.7中翻译字符串

Question

I'm still learning python and a lot of basics are still complicated to me. I just started out using codewars.com, and it seems like an awesome tool to learn any of the languages they have set up so far. The only downside is their python is only 2.7, so some of the code has to be modified from 3.0 to work properly. I'm working on one problem now that wants me to convert (I think translate is what I'm looking for) numbers from the keyboard layout to the phone layout. So I'm trying to translate '7894561230' to '1234567890'. Maybe this is entirely the wrong way to go about doing it, but as I said, I'm still learning. Here is the code I have, but it's not working. I think it's because I'm using python 3.... Any suggestions?

from string import maketrans
def computer_to_phone(numbers):
    dict = str.maketrans('7894561230', '1234567890')
    result = numbers.translate(dict)
    return result

EDIT: Here's the error message I'm getting

Traceback:
   in 
   in computer_to_phone
AttributeError: type object 'str' has no attribute 'maketrans'

Answer 1

I am guessing the issue comes from line -

dict = str.maketrans('7894561230', '1234567890')

You are trying to call str.maketrans , but you there is not such method for str class , in Python 2.x , you should make use of the string.maketrans() you are importing instead -

from string import maketrans
def computer_to_phone(numbers):
    dict = maketrans('7894561230', '1234567890')
    result = numbers.translate(dict)
    return result