code: def euler_options(fn):
      
      euler_functions = cheat, generate, preview, skip, verify, verify_all
  
      # Reverse functions to print help page options in alphabetical order
      for option in reversed(euler_functions):
          name, docstring = option.__name__, option.__doc__
          kwargs = {'flag_value': option, 'help': docstring}
  
          # Apply flag(s) depending on whether or not name is a single word
          flag = '--%s' % name.replace('_', '-')
          flags = [flag] if '_' in name else [flag, '-%s' % name[0]]
  
          fn = click.option('option', *flags, **kwargs)(fn)
  
      return fn
docs: Decorator to link CLI options with their appropriate functions