code: def unpublish(namespace, name, version, registry=None):
      ''' Try to unpublish a recently published version. Return any errors that
          occur.
      '''
      registry = registry or Registry_Base_URL
  
      url = '%s/%s/%s/versions/%s' % (
          registry,
          namespace,
          name,
          version
      )
  
      headers = _headersForRegistry(registry)
      response = requests.delete(url, headers=headers)
      response.raise_for_status()
  
      return Nonf unpublish(namespace, name, version, registry=None):
      ''' Try to unpublish a recently published version. Return any errors that
          occur.
      '''
      registry = registry or Registry_Base_URL
  
      url = '%s/%s/%s/versions/%s' % (
          registry,
          namespace,
          name,
          version
      )
  
      headers = _headersForRegistry(registry)
      response = requests.delete(url, headers=headers)
      response.raise_for_status()
  
      return None
docs: Try to unpublish a recently published version. Return any errors that
          occur.