old_contents: import click
  import importlib
  import os
  import pytest
  import re
  import sys
  
  def get_valid_tutorial_steps():
      """ Find and return a list of test step modules in the tutorial dir. """
  
      try:
          return sorted([f[4:6] for f in os.listdir('tutorial') if \
                  re.search('step\d{2}\.py', f)])
      except OSError as e:
          click.secho(str(e), err=True, fg='red')
          click.secho("No tutorial files found. (This command must be run from" \
                  " within the tutorial repo dir.)", err=True)
          sys.exit(1)
  
  @click.argument('step', type=click.Choice(get_valid_tutorial_steps()))
  @click.command()
  def cli(step):
      """
      This runs the tutorial
      """
      click.echo("Tutorial step {0}".format(step))
  
      result = pytest.main(['-v', 'tutorial/step{0}.py'.format(step)])
  
      if result == 0:
          click.secho('Good job!', fg='green')
      else:
          test_module = importlib.import_module('tutorial.step{0}'.format(step))
          click.secho(str(test_module.__doc__), fg='blue')
  
  
  
  if __name__ == '__main__':
      cli()
  
new_contents: import click
  import importlib
  import os
  import pytest
  import re
  import sys
  
  def get_valid_tutorial_steps():
      """ Find and return a list of test step modules in the tutorial dir. """
  
      try:
          return sorted([f[4:6] for f in os.listdir('tutorial') if \
                  re.search('step\d{2}\.py', f)])
      except OSError as e:
          click.secho(str(e), err=True, fg='red')
          click.secho("No tutorial files found. (This command must be run from" \
                  " within the repo root dir.)", err=True)
          sys.exit(1)
  
  @click.argument('step', type=click.Choice(get_valid_tutorial_steps()))
  @click.command()
  def cli(step):
      """
      This runs the tutorial
      """
      click.echo("Tutorial step {0}".format(step))
  
      result = pytest.main(['-v', 'tutorial/step{0}.py'.format(step)])
  
      if result == 0:
          click.secho('Good job!', fg='green')
      else:
          test_module = importlib.import_module('tutorial.step{0}'.format(step))
          click.secho(str(test_module.__doc__), fg='blue')
  
  
  
  if __name__ == '__main__':
      cli()
  
subject: clarify which dir