Allison Obourn
CSC 110, Spring 2018
Lecture 28

Debugging/Testing write up
****** WARNING: This is incomplete as we didn't finish debugging/testing the program.

1. Run the code
Got invalid syntax error
Added a def to start of function

2. Run it again
Got inconsistent tabs/spaces
Unindent and reindent function

3. Run it again
Traceback (most recent call last):
  File "C:/Users/allison/Documents/110/18sp/testing.py", line 15, in <module>
    main()
  File "C:/Users/allison/Documents/110/18sp/testing.py", line 3, in main
    remove_bad_pairs(data)
  File "C:/Users/allison/Documents/110/18sp/testing.py", line 10, in remove_bad_pairs
    while(i < len(list)):
UnboundLocalError: local variable 'i' referenced before assignment
Look for line 10 and variable i. Unindent i so it gets created every time

4. Run it again
It looped forever
i was never being changed in the loop
Added increment to i at the end of the loop.

5. Run it again
Traceback (most recent call last):
  File "C:/Users/allison/Documents/110/18sp/testing.py", line 16, in <module>
    main()
  File "C:/Users/allison/Documents/110/18sp/testing.py", line 3, in main
    remove_bad_pairs(data)
  File "C:/Users/allison/Documents/110/18sp/testing.py", line 12, in remove_bad_pairs
    list.remove(i - 1)
ValueError: list.remove(x): x not in list
Add print i in the loop so we can see which i is a problem.

6. Run it again
5
Traceback (most recent call last):
  File "C:/Users/allison/Documents/110/18sp/testing.py", line 17, in <module>
    main()
  File "C:/Users/allison/Documents/110/18sp/testing.py", line 3, in main
    remove_bad_pairs(data)
  File "C:/Users/allison/Documents/110/18sp/testing.py", line 13, in remove_bad_pairs
    list.remove(i - 1)
ValueError: list.remove(x): x not in list
Found error happens on first iteration with i = 5. Changed remove to pop since we are dealing with indecies