Division by zero: py4e/code3/average.py, py4e/code/average.py, py4e/code3/avenum.py and py4e/code/avenum.py

[solomon-s-b]

If we type 'done' as the first input, the program will crash with a "ZeroDivisionError".

Traceback (most recent call last):
  File "readnumbers.py", line 15, in <module>
    average = total / count
ZeroDivisionError: float division by zero

Because you already mentioned 'division by zero' earlier in chapter 3 paregrgh 3.8 "Short-circuit evaluation of logical expressions" in the book and also 'Worked Exercise 5.1' on your YouTube channel, I suggest adding the following code before the print command:

if count > 0:
    average = total / count
else:
    average = 0

print('Average:', average)

instead of:

average = total / count
print('Average:', average)

[srcatto]

The examples can't cover all the possibilities, doing that would make the examples too complicated for the point that is being shown. Many of the assignments / exercises also say check for 1 type of error, or assume user enters the data correctly. That is the best way to look at it for now, enter data that the example uses.

[csev]

Thanks.