why would an dataframe value round to only one decimal if it is programmed for 2? code example

Example 1: python round down

>>> int(1.6)
1
>>> int(2)
2
>>> int(3.9)
3

Example 2: how to round a decimal to the nearest whole number in python

>>> import math

>>> math.ceil(1.2)
2

>>> math.ceil(2)
2

>>> math.ceil(-0.5)
0