Daniel Nogradi wrote: > A very simple question: I currently use a cumbersome-looking way of > getting the first, second, etc. line of a text file: > > for i, line in enumerate( open( textfile ) ): > if i == 0: > print 'First line is: ' + line > elif i == 1: > print 'Second line is: ' + line > ....... > ....... > > I thought about f = open( textfile ) and then f[0], f[1], etc but that > throws a TypeError: 'file' object is unsubscriptable. > > Is there a simpler way?
This is the same logic but less cumbersome, if that's what you mean: to_get = [0, 3, 7, 11, 13] got = dict((i,s) for (i,s) in enumerate(open(textfile)) if i in to_get) print got[3] This would probably be the best way for really big files and if you know all of the lines you want ahead of time. If you need to access the file multiple times at arbitrary positions, you may need to seek(0), cache lines already read, or slurp the whole thing, which has already been suggested. James -- James Stroud UCLA-DOE Institute for Genomics and Proteomics Box 951570 Los Angeles, CA 90095 http://www.jamesstroud.com/ -- http://mail.python.org/mailman/listinfo/python-list
