On Tue, Oct 27, 2009 at 10:14 AM, Dave Angel <da...@ieee.org> wrote: > Benno Lang wrote: >> >> On Tue, Oct 27, 2009 at 8:21 AM, Dave Angel <da...@ieee.org> wrote: >> >>> >>> I agree with Luke's comments. But I'd like to point out an apparent bug >>> (I >>> haven't tried the code, this is just by inspection). >>> >>> You use the test >>> if '0' in row[.....] >>> >>> that's not going to check for a zero value, it's going to check for a >>> zero >>> digit character somewhere in the value. So 504 would also be recognized, >>> as >>> well as 540. >>> >> >> I thought this sounded rather fishy, along the following lines: >> row is a list, so slicing it returns a list, so 'in' should compare >> the list elements (i.e. the strings contained therein) with '0'; this >> seems perfectly normal. >> >> I have checked, and thankfully the world is not upside down. It would >> only work the way you describe if row was a string, or if 'in' called >> itself recursively when it found a list. >> >> HTH, >> benno >> >> > > You are quite right, of course. I somehow missed that it was a slice, and > took it instead to be a simple subscript. > > But if the file contained 0.00 as one of its items, this code would still > have the other problem I mentioned. > > DaveA > _______________________________________________ > Tutor maillist - tu...@python.org > To unsubscribe or change subscription options: > http://mail.python.org/mailman/listinfo/tutor > Thanks for your pointers, Dave. Actually the csv file have data like this: CAOCA-SD3,OCA - Sign Design Elements Vol. 3,0,0,0,0,0,0,0,0,0,0,0,0 At first I thought that the csv module would do type coercion and my original code was: if 0 in row but nothing was caught. so I change it to: if '0' in row and all was well.
Especially to Luke and Alan: Yes. A function returning the number of rows with zeros seems like a sensible decision. I'm enjoying the input from this community. I first started diving into programming using AutoHotkey, for a lot of automation stuff on windows. Autohotkey is very much procedure oriented, and you can even record macros. The scripting language allows functions and several other advanced features. Sometimes I have a need and think. Let me quick do this using either Autohotkey or Python. Sometimes both. I am glad that especially being exposed to Python I am learning how to design my code for reuse, making things more flexible, etc. Thanks again. Regards, Eduardo www.expresssignproducts.com _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor