Screenplay Checker

• Pull in snippets/students.py. Goal is to compute from those names (containing umlauts) the directory names.

  • iterate (tuple unpacking) over the tuples in the list.

  • str.replace() umlauts, upper and lower.

  • observe code duplication.

  • ⟶ function transform()

• Once transformed …

  • Take from the commmandline (sys.argv[1]) the repository root

  • Compute the path to each user’s supposed digit program.

    • First, using dumb string additions and /

    • Replace with os.path.join() (⟶ look it up in the docs)

    • Check existence using os.path.isfile()

    • Raise RuntimeError if not there

• Whole program stops on first failure ⟶ collect errors and move on to next user

  • ⟶ except, gathering errors in a list

  • output pass/fail once all users iterated

• Run prog

  • In the shell, run one prog. Show what “capture stdout” means, by redirecting to a file.

  • .../digit 7 | cat > file: aha, pipe to somewhere, and use that instead.

  • Enter subprocess. Read docs.

  • Find that most progs are not executable. Catch that.

    • Raise RuntimeError inside except block.

  • Find that completed.stdout is bytes. OMG, explain encoding. Notebook.

• Module students

  • Raw user list

  • Function to convert to exercise dirs.

  • What else?