python noob, multiple file i/o
joncle at googlemail.com
Fri Mar 16 10:08:20 CET 2007
On 16 Mar, 09:02, "Jon Clements" <jon... at googlemail.com> wrote:
> On 16 Mar, 03:56, "hiro" <Nun... at gmail.com> wrote:
> > Hi there,
> > I'm very new to python, the problem I need to solve is whats the "best/
> > simplest/cleanest" way to read in multiple files (ascii), do stuff to
> > them, and write them out(ascii).
> > --
> > import os
> > filePath = ('O:/spam/eggs/')
> > for file in os.listdir(filePath): #straight from docs
> > # iterate the function through all the files in the directory
> > # write results to separate files <- this is where I'm mostly
> > stuck.
> > --
> > For clarity's sake, the file naming conventions for the files I'm
> > reading from are file.1.txt -> file.nth.txt
> > It's been a long day, i'm at my wits end, so I apologize in advance if
> > I'm not making much sense here.
> > syntax would also be great if you can share some recipes.
> I'd try the glob module.
> import glob
> # Get a list of filenames matching wildcard criteria
> # (note that path is relative to working directory of program)
> matching_file_list = glob.glob('O:/spam/eggs/*.txt')
> # For each file that matches, open it and process it in some way...
> for filename in matching_file_list:
> infile = file(filename)
> outfile = file(filename + '.out','w')
> # Process the input file line by line...
> for line in infile:
> pass # Do something more useful here, change line and write to
> # Be explicit with file closures
> Of course, you can change the wild card criteria in the glob
> statement, and also then filter further using regular expressions to
> choose only files matching more specific criteria. This should be
> enough to get you started though.
> Jon.- Hide quoted text -
> - Show quoted text -
Okies; postcoding before finishing your early morning coffee is not
the greatest of ideas!
I forgot to mention that glob will return pathnames as well. You'll
need to check that os.path.isfile(filename) returns True before
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