slow loop?
Peter Hansen
peter at engcorp.com
Mon Jan 13 12:22:52 EST 2003
P at draigBrady.com wrote:
>
> Brian Kranson wrote:
> > Is there a way I can make this small script any faster? The file it
> > reads in used to be only about a 100 lines and now it is well over
> > 2000. It takes about 14 seconds to run it on my PentiumII. Thanks in
> > advance - Bk
> >
> > import time
> > startTime=time.time()
> > myList=[]
> > finalList=[]
> > myString=''
> > file=open('Export.txt','r')
> > lines=file.readlines()
> > for line in lines:
> > for character in line:
> > if character == '"':
> > None
> > elif character == ',' or character == '\n':
> > myList.append(myString)
> > myString=''
> > else:
> > myString += character
> > finalList.append(myList)
> > myList=[]
> > endTime=time.time()
> > print endTime-startTime
>
> file=open('Export.txt','r')
> for line in file.readlines():
> line = line.strip()
> finalList.append(line.split(','))
This doesn't remove the quotation marks that surround each field, though
it does make a good point: don't process character-by-character in Python
if you want performance!
-Peter
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