class_docstr: Class for managing database.
class_docstr_tok: ["Class","for","managing","database","."]
code: def update(self) -> None:
      self._session.commit()
  
imports: import pandas
  from pandas.core.frame import DataFrame
  from sqlalchemy import Column, Integer, String, create_engine
  from sqlalchemy.ext.declarative import DeclarativeMeta, declarative_base
  from sqlalchemy.orm import Session
label_desc: Use image node_id 11 for calling the Database obj's underlying member method code with example usage: obj.update() without return types