强制进行浮点计算

Question

In IronPython is there any way to force the expression containing integer values to be calculated as floating point. For instance, I'd like the expression

1/3

to be evaluated as

1./3. 

with the result 0.333...

I need this to make a simple run-time expression calculator within a C# project by means of IronPython. I cannot force users to input expression with trailing decimal points.

Answer 1

from __future__ import division

print 1 / 3
print 1 // 3

Answer 2

You may force a floating point division like any of these, no matter if anything is imported from __future__ :

print val1 / (val2 + 0.0)
print (val1 + 0.0) / val2
print float(val1) / val2
print val1 / float(val2)

Answer 3

If your users are entering values anyway, then presumably you are converting the values to int s. So simply convert them to float instead.

val1 = float(raw_input())
val2 = float(raw_input())
print val1/val2