Printing excess decimal places in python

Question

I run the following code:

numero = 80.12
a = int(numero)
b = abs(numero) - abs(int(numero))
print(a,b)

And as a result I get...

80, 0.12000000000000455

I don't know what could be the problem of printing excess of decimal places.

Answer 1

The full gory details can be found in this documentation. Floating point representations of decimal fractions are almost never precise.