code: def close(self):
          
  
          if self.closed:
              return
  
          # Make sure no one minds the connection to be closed
          # This will help avoid MemoryError in other threads,
          # they will get sqlite3.ProgrammingError instead
          if not self.personal_lock.acquire(timeout=self.lock_timeout):
              raise LockTimeoutError(self)
  
          try:
              try:
                  if self.in_transaction:
                      self.db_state.active_connection = None
                      self.db_state.transaction_lock.release()
              except sqlite3.ProgrammingError:
                  pass
  
              if self._cursor is not None and not self._cursor.closed:
                  self._cursor._cursor.close()
                  self._cursor.closed = True
  
              if self.connection is not None:
                  self.connection.close()
  
              self.closed = True
          finally:
              self.personal_lock.release()
docs: Close the connection