code: def delete(self, key):
          "Delete a `key` from the keystore."
          if key in self.data:
              self.delete_from_index(key)
          del self.data[keyf delete(self, key):
          "Delete a `key` from the keystore."
          if key in self.data:
              self.delete_from_index(key)
          del self.data[key]
docs: Delete a `key` from the keystore.