I've got two numbers stored in varibles, a and b, and i'd like to see of the ratio of those two is an integer or not in python. However when I try
result = a./b
it gives me a
SyntaxError: invalid syntax
however if I say
result = a/b
it truncates the decimal portion. How can I get the full numbeer to test for integrality?
I was going to use
if (not isinstance(result, (int, long))):
then do something for non-integer numbers..
Thanks, and i'm using python 2.7.1
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Use this line to get the division behavior you want:
from __future__ import division
Alternatively, you could use modulus:
if (a % b) == 0: #do something
The 1./2 syntax works because 1. is a float. It's the same as 1.0. The dot isn't a special operator that makes something a float. So, you need to either turn one (or both) of the operands into floats some other way -- for example by using float() on them, or by changing however they were calculated to use floats -- or turn on "true division", by using from __future__ import division at the top of the module.
x / y
quotient of x and y
x // y
(floored) quotient of x and y
Multiply by 1.
result = 1. * a / b
or, using the float function
result = float(a) / b
if 'a' is already a decimal; adding '.' would make 3.4/b(for example) into 3.4./b
Try float(a)/b
Source: Stackoverflow.com