truncate the decimals in mean function is statistics module in python code example
Example: 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
>>> import math
>>> math.ceil(1.2)
2
>>> math.ceil(2)
2
>>> math.ceil(-0.5)
0