finding out the number of rows in a CSV file [Resolved]

Fredrik Lundh fredrik at
Wed Aug 27 19:46:17 CEST 2008

John S wrote:

>>> after reading the file throughthe csv.reader for the length I cannot
>>> iterate over the rows.  How do I reset the row iterator?
> A CSV file is just a text file. Don't use csv.reader for counting rows
> -- it's overkill. You can just read the file normally, counting lines
> (lines == rows).

$ more sample.csv
when it
 >>> import csv
 >>> len(list(csv.reader(open('sample.csv'))))
 >>> len(list(open('sample.csv')))


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