[Tutor] Omitting lines matching a list of strings from a file

[galaxywatcher at gmail.com]

> But I would do this with a list comprehension or generator
> expression (depending on your Python version):
>
>
> lines = [line for line in infile if line[146:148] not in omit_states]
> print '\n'.join(lines)

That's very helpful. Thanks. One formatting detail: there is a blank  
line after each line printed, how do I ged rid of the extra blank lines?