Hi, Thanks for your reply. Here in your code i think you didn't multiply the given number with the weight i have mentioned. The each digit of the given number should multiply with weight ...............4,3,2,7,6, 5, 4, 3, 2, 7, 6, 5, 4, 3,2, 1 in this format. That is in detail:
To verify the number use the following weights from right to left: 1, 2, 3, 4, 5, 6, 7, 2, 3, 4, 5, 6, 7, 2, 3, 4, 5, 6, 7... Multiply each digit by its corresponding weight. Add the results together. For the number to be correct the total must be divisible by 11. Field with control digit 1 2 3 4 5 6 7 8 5 Weight 3 2 7 6 5 4 3 2 1 Produce +3 +4 +21 +24 +25 +24 +21 +16 +5 =143 The sum must be divisible by 11 (143 divided by 11 leaves a remainder of 0). So my code has validated only the length of 11 digit. So i am looking for 'n' length of number should be validated with weight ...............4,3,2,7,6, 5, 4, 3, 2, 7, 6, 5, 4, 3,2, 1 from left to right.. Thanks again ... On Fri, Feb 22, 2013 at 4:33 PM, Alec Taylor <alec.tayl...@gmail.com> wrote: > Whoops, my mistake: > > In [5]: [not len(x) >= 2 and len(x)<=25 for x in [str(y) for y in > xrange(30)]] > Out [5]: [True]*10, [False]*20 > > But still, I'm guessing that's not the result you were looking for… > > On Sat, Feb 23, 2013 at 2:30 AM, Alec Taylor <alec.tayl...@gmail.com> > wrote: > > Out[1]: '0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 > > 24 25 26 27 28 29' > > > > In [2]: [not len(x) >= 2 and len(x)<=25 for x in _] > > Out[2]: [True]*79 # shorthand to prevent spam > > > > > > I trust you can see the error now! > > > > On Sat, Feb 23, 2013 at 2:09 AM, Morten Engvoldsen <mortene...@gmail.com> > wrote: > >> Hi , > >> I have wrote the below code to validate a number using modulus 10 and > 11: > >> > >> def is_valid_number(checknum, mod): > >> if mod == 10: > >> if not len(checknum) >= 2 and len(checknum) <=25: > >> return False > >> number = tuple(int(i) for i in reversed(str(checknum)) ) > >> return (sum(int(num) * 2 for num in number[1::2]) % 10) == 0 > >> elif mod == 11: > >> if not len(checknum)!= 11: > >> return False > >> weights = [5, 4, 3, 2, 7, 6, 5, 4, 3, 2, 1] > >> return (sum(w * int(x) for w, x in zip(weights, checknum)) % > 11) == > >> 0 > >> > >> is_valid_number("12345678217", 10) > >> > >> The above code is able to validate 25 length number for modulus 10 , > but for > >> modulus 11 i have done the validation only for 11 digit, Since for > modulus > >> 11 the weight should be in > >> .............4,3,2,7,6, 5, 4, 3, 2, 7, 6, 5, 4, 3, 2, 1 in this format. > >> > >> Could you please let me know how can i validate the 25 length number for > >> modulus 11 with weight ...............4,3,2,7,6, 5, 4, 3, 2, 7, 6, 5, > 4, 3, > >> 2, 1 in this format. > >> > >> Regards, > >> Morten > >> > >> > >> > >> -- > >> http://mail.python.org/mailman/listinfo/python-list > >> >
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