What's the best way to format a phone number in Python?

Question

If all I have is a string of 10 or more digits, how can I format this as a phone number?

Some trivial examples:

555-5555
555-555-5555
1-800-555-5555
         


        

Answer 1

Seems like your examples formatted with three digits groups except last, you can write a simple function, uses thousand seperator and adds last digit:

>>> def phone_format(n):                                                                                                                                  
...     return format(int(n[:-1]), ",").replace(",", "-") + n[-1]                                                                                                           
... 
>>> phone_format("5555555")
'555-5555'
>>> phone_format("5555555")
'555-5555'
>>> phone_format("5555555555")
'555-555-5555'
>>> phone_format("18005555555")
'1-800-555-5555'