Re: Number validation issue

Discussion in 'Python' started by Alec Taylor, Feb 22, 2013.

  1. Alec Taylor

    Alec Taylor Guest

    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 <> 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 <>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 , butfor
    >> 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
    >>
     
    Alec Taylor, Feb 22, 2013
    #1
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