code: def execute(self, query):
          
          c = self.conn.cursor()
          return c.execute(query)
docs: Execute arbitrary queries on the db.
  
          .. seealso::
  
                  :class:`FeatureDB.schema` may be helpful when writing your own
                  queries.
  
          Parameters
          ----------
  
          query : str
  
              Query to execute -- trailing ";" optional.
  
          Returns
          -------
          A sqlite3.Cursor object that can be iterated over.