Change from an integer to a decimal

[Sushi]

Heyo all,

Having a problem which seems really stupid but I just cant solve it.

Im reading in a number of integers from a file e.g. 179, 23, 56
I then have to divde them by 255, but when I do I only ever get values of 0 or 1 rather than something like 0.56, 0.79. I thought I could just convert the number to a float before dividing it e.g a = 179 therefore float(a), but that doesnt seem to work, and Ive looked about on the web but cant find an answer.

Any help would be most appreciated thanks!
Mel

[dshimer]

float() one or both of the numbers before the division, or just use a real for the denominator. If either number is a real, then the answer will be a real

>>> 255/178
1
>>> 255/178.0
1.4325842696629214
>>> float(255)/178
1.4325842696629214
>>>

[ghostdog74]

you can also run your script like this

 python -Qnew yourscript.py

or in your script, import __future__

from __future__ import division
print 255/178

[bvdet]

you can also run your script like this

 python -Qnew yourscript.py

or in your script, import __future__

from __future__ import division
print 255/178

This is new to me so I looked it up. Presently the '/' operator is mapped to object method __div__(). In the future it will be remapped to __truediv__(), which evaluates integer division to float.

__truediv__() can also be accessed thus:

>>> from operator import truediv
>>> truediv(1,2)
0.5
>>> truediv(21,7)
3.0
>>>

Importing division enables this feature.

[bartonc]

Sushi: Great to have you back after so long.
You other three: You guys are awesome. Great posts!

[Sushi]

Thank you all very much for your help!
I wasn't floating both numbers, only the ones that were being read in from the file which is why it wasnt working. So again many thanks for the help!

Barton: Good to be back! I've been working on using Blender quite a lot, and whilst it's a very nice piece of software isnt exactly the easiest thing to use with python!

Mel