python pass a csv file twice

 pass a csv file twice. The first pass works perfectly:
LAreader = csv.reader(open(InFileName,'r'))
for line in LAreader:
SvcDepNamesSet.add (line[0].strip())When I try a second time, there is no action in response. (Probably because all records have been read?) Is there a way to close the file or do something else so that the file can be passed a second time?
Powered by