code: def get_cached_manylinux_wheel(self, package_name, package_version, disable_progress=False):
          
          cached_wheels_dir = os.path.join(tempfile.gettempdir(), 'cached_wheels')
          if not os.path.isdir(cached_wheels_dir):
              os.makedirs(cached_wheels_dir)
  
          wheel_file = '{0!s}-{1!s}-{2!s}'.format(package_name, package_version, self.manylinux_wheel_file_suffix)
          wheel_path = os.path.join(cached_wheels_dir, wheel_file)
  
          if not os.path.exists(wheel_path) or not zipfile.is_zipfile(wheel_path):
              # The file is not cached, download it.
              wheel_url = self.get_manylinux_wheel_url(package_name, package_version)
              if not wheel_url:
                  return None
  
              print(" - {}=={}: Downloading".format(package_name, package_version))
              with open(wheel_path, 'wb') as f:
                  self.download_url_with_progress(wheel_url, f, disable_progress)
  
              if not zipfile.is_zipfile(wheel_path):
                  return None
          else:
              print(" - {}=={}: Using locally cached manylinux wheel".format(package_name, package_version))
  
          return wheel_path
docs: Gets the locally stored version of a manylinux wheel. If one does not exist, the function downloads it.