Lists allow us to store a lot of data at once. Often the difficult part of working with lists is not the storage, but processing the data within. To demonstrate your knowledge of using lists, write a function that averages the numbers contained within the list.
Details
  Write a function
  called compute_average(an_integer_list).  This function
  takes a single parameter, a list of integers.  Your function should
  return a floating point value: the arithmetic mean of the integers
  in the list.
Make sure your program handles all necessary cases gracefully. What additional test cases should you check?
Sample Test Cases
| Function Parameters | Sample Output | 
|---|---|
| [1, 2, 3] | 2.0 | 
| [0] | 0.0 | 
Submission
Submit your program as a .py file on the course Inquire page before class on Friday October 31st.