new_contents: from os.path import dirname, basename, isfile
  import glob
  
  excepts = ['__init__', 'widget']
  # Find all *.py files and add them to import
  modules = [basename(f)[:-3] for f in glob.glob(dirname(__file__)+"/*.py") if
          isfile(f)]
  __all__ = [f for f in modules if f not in excepts]
  
subject: Load all widgets when 'widgets' module is loaded.