Re: Iterate over text file, discarding some lines via context manager

From	Marko Rauhamaa <marko@pacujo.net>
Newsgroups	comp.lang.python
Subject	Re: Iterate over text file, discarding some lines via context manager
Date	2014-11-28 19:55 +0200
Organization	A noiseless patient Spider
Message-ID	<87fvd3dxb7.fsf@elektro.pacujo.net> (permalink)
References	<mailman.16405.1417187079.18130.python-list@python.org> <5478ab81$0$2879$426a34cc@news.free.fr> <mailman.16414.1417196454.18130.python-list@python.org>

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Dave Angel <davea@davea.name>:

> Why would you prefer that over a generator function, as given earlier
> in the thread? See for example Ned's message. By using 'yield', you
> get Python to generate all the class boilerplate for you.

I think the OP can learn from the comparison. One question, many
lessons:

 * Here's how you write a generator.

 * Here's how you write a context manager class. You run into those
   quite often as well.

 * See how much more suitable a generator is in this case.

No need to shoot down those who only try to be helpful.


Marko

Thread

Iterate over text file, discarding some lines via context manager "fetchinson ." <fetchinson@googlemail.com> - 2014-11-28 16:04 +0100
  Re: Iterate over text file, discarding some lines via context manager "ast" <nomail@invalid.com> - 2014-11-28 18:06 +0100
    Re: Iterate over text file, discarding some lines via context manager Dave Angel <davea@davea.name> - 2014-11-28 12:40 -0500
      Re: Iterate over text file, discarding some lines via context manager Marko Rauhamaa <marko@pacujo.net> - 2014-11-28 19:55 +0200
        Re: Iterate over text file, discarding some lines via context manager Chris Angelico <rosuav@gmail.com> - 2014-11-29 05:02 +1100
          Re: Iterate over text file, discarding some lines via context manager Marko Rauhamaa <marko@pacujo.net> - 2014-11-28 20:04 +0200

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