Results for “debugging”

Showing 1–10 of 37

  2. Challenge

    Wrong line commented out

    …result before giving the "go". Yesterday a developer was debugging it and left it in a mess: a real check is switched off with a # , and a debug line that should never reach the launch director is…

    Fix the code Easy 2 stages comments debugging print

  3. Challenge

    Logging instead of print

    The tank check is full of prints left over from debugging. Replace them with logging calls at the right levels, so debug records stay hidden until switched on, then give the fuel code its own named…

    Fix the code Medium 2 stages logging debug info warning

  4. Challenge

    Flight software review

    A 40-line pre-burn check has five bugs: a syntax error, a type error, a wrong key, an index out of range and a reversed decision. Read each error to fix the four that crash, then find the one that…

    Fix the code Hard 2 stages project debugging SyntaxError TypeError

  5. Challenge

    Catch what you expect

    A bare except: reports every fuel reading as bad, because it also catches a NameError from a typo. Predict the last line, find the hidden error, catch only ValueError and fix the typo, then write a…

    Fix the code Medium 3 stages errors try except ValueError

  6. Challenge

    Read the traceback

    A Python program stops with a traceback. Read it from the bottom up to find the error, the function and the line, fix the bug there, then follow a longer traceback through four calls to a second bug.

    Fix the code Easy 2 stages errors traceback KeyError TypeError

  7. Challenge

    Launch counter crash

    record_launch() adds 1 to a global counter and stops with an UnboundLocalError. Predict it, find out why Python treats the name as local, fix it by passing the count in and returning the new one, then…

    Fix the code Medium 3 stages functions scope UnboundLocalError global

  8. Challenge

    Shadowed fuel

    refuel() assigns to fuel_kg inside the function, creating a local variable and leaving the global fuel unchanged. Predict the last line, compare both values, fix it by returning the total, then write…

    Fix the code Medium 3 stages functions scope local variables global variables

  9. Challenge

    Shared default list

    add_sample(sample, log=[]) remembers samples from earlier calls, because the default list is created once and shared. Predict it, prove the calls share one list, fix it with None as the default, then…

    Fix the code Medium 3 stages functions default values mutable defaults None