On Mon, Dec 12, 2016 at 2:29 PM, Bryon Adams <bryonad...@openmailbox.org> wrote: > Is there a way to force my argument to always be a string before entering > the function?
You could do the following: 1. Use `def ip_checker(ip_address: str):` to make it more clear that you're expecting a str, but remember, this is just a "hint", it doesn't enforce anything. (Read more at https://docs.python.org/3/library/typing.html#module-typing) 2. You could also write something like that: valid_ip = "192.168.0.1" invalid_ip = 10 def ip_check(ip_addr: str): if type(ip_addr) is not str: raise TypeError('The IP address should be a string.') # https://docs.python.org/3/library/exceptions.html#TypeError # continue your function... print(ip_addr, 'is valid!') ip_check(valid_ip) # 192.168.0.1 is valid! ip_check(invalid_ip) # TypeError: The IP address should be a string. _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
