I am not an expert and don't know if this is considered 'elegant', but this is what I would try
conv = [[j[0], int(j[1]), int(j[2])] + j[3:] for j in LoL] > Hi Your, > > I work with genomic datasets as well and have recently only started > working with python (so my advice is a bit naive) > > I would say although there may be different ways you can cast an integer > or float type into your list of lists you may actually no need to do so with > your starting file/list... ie: > > if for example you want to do stuff with the location chrX with start > 160944034 and end 160944035 > > you could: > for x in LoL: > startstring=LoL[1] #this would be '160944034' > startint=int(startstring) #this would be 160944034 > > now if you also use a counter you can iterate and do all sort of > calculations for different genomic locations. > > I use the csv module and then append into a numpy array that takes type > float, so you could work with that as well, > > cheers > > > Dr Triantafyllos Gkikopoulos > >>> culpritNr1 <ig2ar-s...@yahoo.co.uk> 01/08/09 8:42 PM >>> > > Hi All, > > Say I have this nice list of lists: > > LoL = [['chrX', '160944034', '160944035', 'gnfX.145.788', '63.60'], > ['chrX', '161109992', '161109993', 'rs13484104', '63.60'], > ['chrX', '161414112', '161414113', 'rs13484105', '63.60'], > ['chrX', '161544071', '161544072', 'rs13484106', '63.60'], > ['chrX', '162030736', '162030737', 'gnfX.146.867', '67.05'], > ['chrX', '164171913', '164171914', 'gnfX.148.995', '70.45']] > > Now I want to cast the second and third "columns" from string to integer, > like this > > LoL = [['chrX', 160944034, 160944035, 'gnfX.145.788', '63.60'], > ['chrX', 161109992, 161109993, 'rs13484104', '63.60'], > ['chrX', 161414112, 161414113, 'rs13484105', '63.60'], > ['chrX', 161544071, 161544072, 'rs13484106', '63.60'], > ['chrX', 162030736, 162030737, 'gnfX.146.867', '67.05'], > ['chrX', 164171913, 164171914, 'gnfX.148.995', '70.45']] > > Is there any elegant way to do this? I can't assume that all lines will > have > the same number of elements. > > Thank you, > > Your Culprit > > > -- > View this message in context: > http://www.nabble.com/casting-string-to-integer-in-a-list-of-lists-tp21359600p21359600.html > Sent from the Python - tutor mailing list archive at Nabble.com. > > _______________________________________________ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor > > The University of Dundee is a registered Scottish charity, No: SC015096 >
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