Question

I’m testing a system where is specific rounding – last number is always rounded up

e.g.

• 123,459 should yield 123,46
• 99,9911 should yield 100,00

How can I implement it in python?

EDIT

The most important thing – those numbers are prices

Answer 1

import math
def myRounding(x):
   return math.ceil(x*100) / 100.0

Note that due to floating point not being able to express all decimal fractions, some results won’t be able to be expressed in floating point numbers. If this is an issue, calculate in fixed-point numbers (i.e. 1.23 is represented by 123, with a fixed factor of 0.01), or use decimal.Decimal.