script files with python (instead of tcsh/bash)?
Esmail
ebonak at hotmail.com
Mon Mar 23 10:04:46 EDT 2009
Hello again Nick,
thanks for the additional script example. I was able to put
something together where I read the whole file into a list
as a series of lines (via readlines()) and then loop through
the lines seeing if the target string was "in" the line .. seems
to have worked reasonably well.
I am sure over time I will pick up the more Python(ic?) ways of
doing things.
> I presume you mean something like this
>
> ... | awk '{print $2}'
>
> In python, assuming you've got the line in the "line" variable, then
>
> In python an equivalent of the above would be
>
> import fileinput
> for line in fileinput.input():
> print line.split()[1]
cool .. that is what I came up with too!
> Note that the fileinput module is really useful for making shell
> command replacements!
yes, I am going to have to process a number of files, so I'm also
looking at glob and os.walk(??)
>> The other things I need to do consist of moving files, manipulating file
>> names and piping outputs of one command to the next, so I'm digging into
>> the documentation as much as I can.
>
> Read up on the os module and the subprocess module. You'll find you
> need to do much less piping with python as with shell because it has
> almost everything you'll need built in.
>
> Using built in functions is much quicker than fork()-ing an external
> command too.
Thanks again for all the useful info and examples, this really has been
a great help.
Esmail
More information about the Python-list
mailing list