how to remove zeroes from list code example

Example 1: how to remove all zeros from a list in python

X = [0,5,0,0,3,1,15,0,12]
X = [i for i in X if i != 0]

Example 2: remove trailing zeros python

var = round(var, 1) #the first value is the number or var 
#to round, the second is what desimal to round to