code: def entrypoint(method, depth=1, cls=None):
      
  
      current_frame = inspect.currentframe(depth).f_locals
  
      if '__name__' in current_frame and current_frame['__name__'] == '__main__':
  
          if cls is None:
              cls = CLI
  
          method(cls())
  
      return method
docs: Run a method as your __main__ via decorator.
  
        Example::
  
          @shrew.cli.entrypoint
          def main(cli):
            ...
  
        Shorthand for::
  
          def main():
  
            cli = shrew.cli.CLI()
  
            ...
  
          if __name__ == '__main__':
            method()