Re: OverflowError: math range error...
Thanks for the tips! I am going to look into this some more. /Sheldon Simon Forman skrev: Sheldon wrote: Hi, I have a written a script that will check to see if the divisor is zero before executing but python will not allow this: if statistic_array[0:4] 0.0: statistic_array[0,0:4] = int(multiply(divide(statistic_array[0,0:4],statistic_array \ [0,4]),1.0))/100.0 Does anyone know why Python is complaining: statistic_array[0,0:4] = int(multiply(divide(statistic_array[0,0:4],statistic_array[0,4]),1.0))/100.0 OverflowError: math range error and how do I get around this problem? This stupid because there is a if statement preventing this dividing by zero. Sincerely, Sheldon I don't know what special math modules you're using, but python usually raises ZeroDivisionError for divide-by-zero problems. Try printing the intermediate values of each step in your problem code. d = divide(statistic_array[0,0:4], statistic_array[0,4]) print d m = multiply(d, 1.0) print m i = int(m) print i statistic_array[0,0:4] = i That might help you track down what's wrong. -- http://mail.python.org/mailman/listinfo/python-list
Re: OverflowError: math range error...
Thanks for the tips! I am going to look into this some more. I am not used to using Numeric and the logical functions. I didn't think about what you pointed out and somewhere the returned values from these logical methods are not what I expect. I will rewrite the whole thing using alltrue instead. /Sheldon Robert Kern skrev: Sheldon wrote: Hi, I have a written a script that will check to see if the divisor is zero before executing but python will not allow this: if statistic_array[0:4] 0.0: statistic_array[0,0:4] = int(multiply(divide(statistic_array[0,0:4],statistic_array \ [0,4]),1.0))/100.0 Does anyone know why Python is complaining: statistic_array[0,0:4] = int(multiply(divide(statistic_array[0,0:4],statistic_array[0,4]),1.0))/100.0 OverflowError: math range error and how do I get around this problem? This stupid because there is a if statement preventing this dividing by zero. What kind of arrays are you using? If it's Numeric (and I think it is because numarray and numpy would throw an error at the if: statement), then your test is incorrect. Comparisons yield arrays of boolean values. When a Numeric boolean array is used as a truth value (like in an if: statement), then it will return True is *any* of the values are True. Use Numeric.alltrue(statistic_array[:4] 0.0) instead. Both numarray and numpy throw an exception when one attempts to use arrays as truth values since the desired meaning (alltrue or sometrue) is ambiguous. -- Robert Kern I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth. -- Umberto Eco -- http://mail.python.org/mailman/listinfo/python-list
Re: OverflowError: math range error...
Sheldon wrote: Hi, I have a written a script that will check to see if the divisor is zero before executing but python will not allow this: if statistic_array[0:4] 0.0: statistic_array[0,0:4] = int(multiply(divide(statistic_array[0,0:4],statistic_array \ [0,4]),1.0))/100.0 Does anyone know why Python is complaining: statistic_array[0,0:4] = int(multiply(divide(statistic_array[0,0:4],statistic_array[0,4]),1.0))/100.0 OverflowError: math range error and how do I get around this problem? This stupid because there is a if statement preventing this dividing by zero. Sincerely, Sheldon I don't know what special math modules you're using, but python usually raises ZeroDivisionError for divide-by-zero problems. Try printing the intermediate values of each step in your problem code. d = divide(statistic_array[0,0:4], statistic_array[0,4]) print d m = multiply(d, 1.0) print m i = int(m) print i statistic_array[0,0:4] = i That might help you track down what's wrong. -- http://mail.python.org/mailman/listinfo/python-list
Re: OverflowError: math range error...
Sheldon wrote: Hi, I have a written a script that will check to see if the divisor is zero before executing but python will not allow this: if statistic_array[0:4] 0.0: statistic_array[0,0:4] = int(multiply(divide(statistic_array[0,0:4],statistic_array \ [0,4]),1.0))/100.0 Does anyone know why Python is complaining: statistic_array[0,0:4] = int(multiply(divide(statistic_array[0,0:4],statistic_array[0,4]),1.0))/100.0 OverflowError: math range error and how do I get around this problem? This stupid because there is a if statement preventing this dividing by zero. What kind of arrays are you using? If it's Numeric (and I think it is because numarray and numpy would throw an error at the if: statement), then your test is incorrect. Comparisons yield arrays of boolean values. When a Numeric boolean array is used as a truth value (like in an if: statement), then it will return True is *any* of the values are True. Use Numeric.alltrue(statistic_array[:4] 0.0) instead. Both numarray and numpy throw an exception when one attempts to use arrays as truth values since the desired meaning (alltrue or sometrue) is ambiguous. -- Robert Kern I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth. -- Umberto Eco -- http://mail.python.org/mailman/listinfo/python-list
