code: def _needs_hiding(mod_name):
      
      pattern = re.compile(r'(setuptools|pkg_resources|distutils|Cython)(\.|$)')
      return bool(pattern.match(mod_name))
docs: >>> _needs_hiding('setuptools')
      True
      >>> _needs_hiding('pkg_resources')
      True
      >>> _needs_hiding('setuptools_plugin')
      False
      >>> _needs_hiding('setuptools.__init__')
      True
      >>> _needs_hiding('distutils')
      True
      >>> _needs_hiding('os')
      False
      >>> _needs_hiding('Cython')
      True