On Tue, Mar 6, 2012 at 3:58 PM, Joel Goldstick <joel.goldst...@gmail.com> wrote: > On Tue, Mar 6, 2012 at 3:49 PM, Joel Goldstick <joel.goldst...@gmail.com> > wrote: >> On Tue, Mar 6, 2012 at 3:07 PM, kumar s <ps_pyt...@yahoo.com> wrote: >>> Hi : >>> >>> I have some strings with both alpha-numeric strings. I want to add all the >>> numbers in that string and leave characters and special characters. >>> 1A0G19 >>> >>> 5G0C25^C52 >>> >>> 0G2T3T91 >>> 44^C70 >>> >>> How can I count only the numbers in the above. >>> >>> 1 A 0 G 19 = 1+0+19 = 20 >>> >>> 5 G 0 C 25 ^C 52 = 5+0+25+52 = 82 >>> >>> 0 G 2 T 3 T 91 = 0+2+3+91 = 96 >>> 44 ^C 70 = 44+70 = 114 >>> >>> In first string 1A0G19 I am only adding 1, 0, and 19. I am not >>> splitting 19 to add 1+9 which will give totally wrong answer for me. >>> >>> >>> Is there a way I can do this. >>> >>> Thanks for your advise. >>> >>> kumar >>> >>> _______________________________________________ >>> Tutor maillist - Tutor@python.org >>> To unsubscribe or change subscription options: >>> http://mail.python.org/mailman/listinfo/tutor >> >> I am pretty much a novice with regular expressions, but this seems to >> work to find all the numeric sequences: >> >>>>> source = 'ab123t&4533www' >>>>> re.findall('\d*', source) >> ['', '', '123', '', '', '4533', '', '', '', ''] >>>>> >> so then something like this: >> >> total = 0 >> my_list = re.findall('\d*', source) >> for my_number in my_list: >> if my_number != '' >> total += int(my_number) >> >> >> >> -- >> Joel Goldstick > > Here is a shorter way: > >>>> source = 'ab123t&4533www' >>>> my_list = re.findall('\d*', source)
if you change above to '\d+' it will only pick up the numbers so below you can do >>>> sum(int(s) for s in my_list) which is even simpler. >>>> my_list > ['', '', '123', '', '', '4533', '', '', '', ''] >>>> sum(int(s) for s in my_list if s != '') > 4656 > Sorry for my messing up the regex in the first try > > -- > Joel Goldstick -- Joel Goldstick _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
