For example, the standard division symbol '/' rounds to zero:
>>> 4 / 100
0
However, I want it to return 0.04. What do I use?
There are three options:
>>> 4 / float(100)
0.04
>>> 4 / 100.0
0.04
which is the same behavior as the C, C++, Java etc, or
>>> from __future__ import division
>>> 4 / 100
0.04
You can also activate this behavior by passing the argument -Qnew
to the Python interpreter:
$ python -Qnew
>>> 4 / 100
0.04
The second option will be the default in Python 3.0. If you want to have the old integer division, you have to use the //
operator.
Edit: added section about -Qnew
, thanks to ΤΖΩΤΖΙΟΥ!