On 5 Sep, 12:34, John Machin <[EMAIL PROTECTED]> wrote: > On Sep 5, 8:58 pm, planetmatt <[EMAIL PROTECTED]> wrote: > > > I am a Python beginner. I am trying to loop through a CSV file which > > I can do. What I want to change though is for the loop to start at > > row 2 in the file thus excluding column headers. > > > At present I am using this statement to initiate a loop though the > > records: > > > for line in f.readlines(): > > > How do I start this at row 2? > > The quick answer to your literal question is: > for line in f.readlines()[1:]: > or, with extreme loss of elegance, this: > for lino, line in enumerate(f.readlines()): > if not lino: > continue > > But readline and readlines are old hat, and you wouldn't want to read > a file of a few million lines into a big list, so a better answer is: > > _unused = f.next() > for line in f: > > But you did say you were reading a CSV file, and you don't really want > to do your own CSV parsing, even if you think you know how to get it > right, so best is: > > import csv > rdr = csv.reader(f) > heading_row = rdr.next() > for data_row in rdr: > > HTH, > John
Thanks so much for the quick response. All working now. I had looked at the CSV module but when I ran into another problem of trying to loop through all columns, I was given a solution in another forum which used the readlines() method. I have looked at the CSV documentation but didn't see any mention of heading_row or data_row. Is there a definitive Python documentation site with code examples like MS's MSDN? -- http://mail.python.org/mailman/listinfo/python-list
