Iterate over text file, discarding some lines via context manager

Marko Rauhamaa marko at
Fri Nov 28 19:04:49 CET 2014

Chris Angelico <rosuav at>:

> Since we're so good at it on this list, I will nit-pick: that's not a
> context manager class, that's an iterator class. A context manager has
> __enter__ and __exit__, an iterator has __iter__ (returning self) and
> __next__ (returning or raising StopIteration).

Excellent. Learnings will never end.


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