Thanks Daniel, That is EXACTLY what I was looking for.
Actually, int() does not really work but this does: [ [line[0], eval(line[1]), eval(line[2])] + line[3:] for line in LoL] Again, thanks. culpritNr1 Daniel Sarmiento-2 wrote: > > 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 >> > > _______________________________________________ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor > > -- View this message in context: http://www.nabble.com/casting-string-to-integer-in-a-list-of-lists-tp21359600p21375430.html Sent from the Python - tutor mailing list archive at Nabble.com. _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
