Use the str() function. M
On Thu, 15 Dec 2016, 07:56 Bryon Adams, <bryonad...@openmailbox.org> wrote: > Is there a way to force my argument to always be a string before > entering the function? Else, is there a better way to go about this? In > whatever program I write, I could change what I want as input to be a > string prior to tossing it into the function but I think it would make > more sense for my function to already do it. The function otherwise > works. This is on Python3.5 under Fedora 25 > > The only other thing I could think of would be to put exceptions in for > syntax error and whatever else pops up as I go along, though to be > honest it *should* always be a string that gets dumped into the > function. Not sure how I'd put the exception together though since it's > not making it into the function prior to failing. > > ------------------------------------------- > Error from interpreter: (looks like it's taking issue with it being a > number it doesn't know how to deal with) > > >>> ip_checker(169.254.0.1) > File "<stdin>", line 1 > ip_checker(169.254.0.1) > ^ > SyntaxError: invalid syntax > > ------------------------------------------- > My function: > > def ip_checker(ip_address): > ''' > Takes one IP address and checks whether it is valid or not. > ''' > # Try to convert to integers > try: > ip_addr = [int(i) for i in ip_address.split('.')] > except ValueError: > print('Invalid characters were entered or an octet is empty, please > try again.') > return False > > # Determine how many octets were entered > if len(ip_addr) != 4: > print('Incorrect number of octets, please try again.') > return False > > # Determine validity of first octet > if ((ip_addr[0] > 223) and (ip_addr[0] < 256)) or (ip_addr[0] == 0): > print('First octet is reserved or zero.') > return False > > # Determine if this is a loopback address > if ip_addr[0] == 127: > print('I think that was a loopback address, please try again.') > return False > > # Determine if this is an APIPA address > if (ip_addr[0] == 169) and (ip_addr[1] == 254): > print('I think that was an APIPA address, please try again.') > return False > > # Determine if the last three octets are between 0-255 > for octet in (ip_addr[1], ip_addr[2], ip_addr[3]): > if octet not in [i for i in range(0,256)]: > print('Octet too large or too small, please try again.') > return False > else: > print('The IP address {} is valid.'.format(ip_address)) > return True > > _______________________________________________ > Tutor maillist - Tutor@python.org > To unsubscribe or change subscription options: > https://mail.python.org/mailman/listinfo/tutor > _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor