On 11/28/2014 08:04 AM, fetchinson . wrote:
> Hi all,
>
> I have a feeling that I should solve this by a context manager but
> since I've never used them I'm not sure what the optimal (in the
> python sense) solution is. So basically what I do all the time is
> this:
I'd personally do it with a generator function.
def filter(input):
for line in input:
if not line:
# discard empty lines
continue
if line.startswith( '#' ):
# discard lines starting with #
continue
items = line.split( )
if not items:
# discard lines with only spaces, tabs, etc
continue
yield items
for line_items in filter(open( 'myfile' )):
process( items )
For an excellent presentation on this sort of thing, see:
http://www.dabeaz.com/generators/
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