import sys

def div(a, b):
    print("dividing {} by {} is {}".format(a, b, a/b))

total = 100
values = [2, 5, 0, 4]

for val in values:
    try:
        div(total, val)
    except ZeroDivisionError:
        print("Cannot divide by 0", file=sys.stderr)

# dividing 100 by 2 is 50.0
# dividing 100 by 5 is 20.0
# Cannot divide by 0
# dividing 100 by 4 is 25.0

