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Re: seek operation in python

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On 04/30/2015 01:50 PM, Cecil Westerhof wrote:
> Op Thursday 30 Apr 2015 21:38 CEST schreef Larry Hudson:
>
>> On 04/30/2015 01:06 AM, Cecil Westerhof wrote:
>> [snip]
>>
>>> I wrote a module where I have:
>>> def get_indexed_message(message_filename, index):
>>> """
>>> Get index message from a file, where 0 gets the first message
>>> """
>>>
>>> return open(expanduser(message_filename),
>>> 'r').readlines()[index].rstrip()
>>>
>> Very minor nit unrelated to the file closing question:
>> This would be a good place to give index a default value...
>>
>> def get_indexed_message(message_filename, index=0):
>
> Why would you want this? I think the index should always be defined.
>
Matter of opinion, of course, but this allows calling the function without specifying the index 
and you still get a useful (and logical) result.  I find this convenient in most similar cases. 
  Using default parameters is quite Pythonic.  Note that this _permits_ using the function this 
way, it does not _require_ it.  Of course, it also should be suitably documented.  Naturally, YMMV.

      -=- Larry -=-

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seek operation in python siva sankari R <buddingrose11@gmail.com> - 2015-04-29 11:08 -0700
  Re: seek operation in python Joel Goldstick <joel.goldstick@gmail.com> - 2015-04-29 14:17 -0400
    Re: seek operation in python siva sankari R <buddingrose11@gmail.com> - 2015-04-29 11:26 -0700
      Re: seek operation in python Billy Earney <billy.earney@gmail.com> - 2015-04-29 13:42 -0500
      Re: seek operation in python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-04-29 21:53 +0100
        Re: seek operation in python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-04-30 10:19 +1000
  Re: seek operation in python MRAB <python@mrabarnett.plus.com> - 2015-04-29 19:50 +0100
  Re: seek operation in python John Gordon <gordon@panix.com> - 2015-04-29 18:53 +0000
  Re: seek operation in python Chris Angelico <rosuav@gmail.com> - 2015-04-30 10:33 +1000
    Re: seek operation in python Cecil Westerhof <Cecil@decebal.nl> - 2015-04-30 08:27 +0200
      Re: seek operation in python Chris Angelico <rosuav@gmail.com> - 2015-04-30 17:33 +1000
        Re: seek operation in python Cecil Westerhof <Cecil@decebal.nl> - 2015-04-30 10:06 +0200
          Re: seek operation in python Dave Angel <davea@davea.name> - 2015-04-30 04:31 -0400
            Re: seek operation in python Cecil Westerhof <Cecil@decebal.nl> - 2015-04-30 11:06 +0200
              Re: seek operation in python Chris Angelico <rosuav@gmail.com> - 2015-04-30 19:39 +1000
          Re: seek operation in python Larry Hudson <orgnut@yahoo.com> - 2015-04-30 12:38 -0700
            Re: seek operation in python Cecil Westerhof <Cecil@decebal.nl> - 2015-04-30 22:50 +0200
              Re: seek operation in python Larry Hudson <orgnut@yahoo.com> - 2015-04-30 19:42 -0700
  Re: seek operation in python Cecil Westerhof <Cecil@decebal.nl> - 2015-04-30 14:31 +0200

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