Tirsvad
5af3a58578
Add src/main.py with the six debugging exercises (describe the problem, reproduce the bug, play computer, fix the errors, print is your friend, use a debugger), each with its fix noted. Document them in the README.
1.3 KiB
1.3 KiB
013-debugging
Day 13 of Udemy's 100 Days of Code: Python Pro Bootcamp: finding and fixing bugs in Python code.
All exercises live in src/main.py, each commented out with the
fix noted beside it. Uncomment one at a time to run it.
Exercises
| Exercise | Bug | Fix |
|---|---|---|
| Describe the Problem | range(1, 20) never reaches 20, because the upper bound is excluded |
Use range(1, 21) |
| Reproduce the Bug | dice_imgs[dice_num] raises IndexError when the roll is 6 |
Index with dice_num - 1 |
| Play Computer | A birth year of exactly 1994 matches no branch | Use >= in the elif |
| Fix the Errors | input() returns a string, so age > 18 fails; the print is not indented |
Convert with int(); indent the print |
| Print is Your Friend | == compares instead of assigning, so word_per_page stays 0 |
Use = |
| Use a Debugger | b_list.append(new_item) sits outside the loop, so only the last item is kept |
Indent it into the loop |
Debugging approach
- Describe the problem in your own words.
- Reproduce the bug.
- Play computer: step through the code by hand.
- Fix the errors the interpreter reports.
- Use
print()to inspect values. - Use a debugger to step through execution.
Running
Requires Python 3.
python src/main.py