questions anon, 08.08.2011 01:57:
Thank you, I didn't realise that was all I needed. Moving on to the next problem: I would like to loop through a number of directories and decompress each *.gz file and leave them in the same folder but the code I have written only seems to focus on the last folder. Not sure where I have gone wrong. Any feedback will be greatly appreciated.import gzip import os MainFolder=r"D:/DSE_work/temp_samples/" for (path, dirs, files) in os.walk(MainFolder): for dir in dirs: outputfolder=os.path.join(path,dir) print "the path and dirs are:", outputfolder for gzfiles in files: print gzfiles if gzfiles[-3:]=='.gz': print 'dealing with gzfiles:', dir, gzfiles f_in=os.path.join(outputfolder,gzfiles) print f_in compresseddata=gzip.GzipFile(f_in, "rb") newFile=compresseddata.read() f_out=open(f_in[:-3], "wb") f_out.write(newFile)
Note how "outputfolder" is set and reset in the first inner loop, *before* starting the second inner loop. Instead, build the output directory name once, without looping over the directories (which, as far as I understand your intention, you can ignore completely).
Also, see the shutils module. It has a method that efficiently copies data between open file(-like) objects. With that, you can avoid reading the whole file into memory.
Stefan _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
