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http://docs.python.org/dev/library/ipaddress.html#module-ipaddress http://docs.python.org/dev/library/ipaddress.html#module-ipa... Am I the only one worries th

• hynek 14y ago
  Ehm, how do you check whether an IP address is inside of a specific network with strings? Or how two networks overlap? How many addresses a network has? Hint: there’s more than /24 networks and IPv6 makes it even more complicated.
  • sho_hn 14y ago
    While I don't share the OP's worry, I'm guessing he was thinking of utility functions operating on strings as the alternative.
    • hynek 14y ago
      You can’t hide the complexity of doing that right but OTOH the ipaddress objects have useful str() methods: >>> str(ipaddress.ip_address('127.0.0.1')) '127.0.0.1' >>> str(ipaddress.ip_address('::1')) '::1' >>> str(ipaddress.ip_network('192.168.42.0/24')) '192.168.42.0/24' But you can do stuff like: >>> ipaddress.ip_address('192.168.42.23') in ipaddress.ip_network('192.168.42.0/24') True >>> ipaddress.ip_address('192.168.41.23') in ipaddress.ip_network('192.168.42.0/24') False or for addr in ipaddress.ip_network('192.168.42.0/24'): print(adds) Etc. I strongly suggest to have a look at http://docs.python.org/dev/howto/ipaddress.html#ipaddress-howto http://docs.python.org/dev/howto/ipaddress.html#ipaddress-ho... to have an overview over it’s functionality – unfortunately the API docs aren’t done yet, but will be for 3.3 final. edit fixed code markup
      • sho_hn 14y ago
        Just for the record, I agree that the problem space is such that a utility class is warranted having written code dealing with IP addresses in the past; I was just speculating about the OP's thoughts :).
    • est 14y ago
      yes, just one or two utility functions would do. IMHO there is no need to initialize a class and call a method just for checking network overlap/boundaries.
      • baq 14y ago
        no need to use it, really. you can pretend it doesn't exist. problem solved.
      • alex-g 14y ago
        It's not a high overhead. Your string method would have to do basically the same thing as the ipaddress initialization and method call. As a benefit, with ipaddress you don't have to re-parse the string every time you want to manipulate it as an address; and you get a bit of typechecking and documentation from using a specialized class.
• irahul 14y ago
  > I am worried that Python is slowly turning into Java. Instead of simple text/string for everything, now Class for everything, with nauty weird ill-defined Exceptions. The example your are pointing out is for the module ipaddress which is for inspecting and manipulating ip addresses. It's not that Python now requires you to use ipaddress objects in place of strings for sockets.
  • est 14y ago
    > It's not that Python now requires you to use ipaddress objects in place of strings for sockets. In that case it's good to hear.