python Sql Alchemy样板

Posted 2021-05-09

from sqlalchemy import create_engine, Table, MetaData
from sqlalchemy.orm import sessionmaker
import pandas as pd

credentials = dict(username = "username",
                   password = "password",
                   host = "localhost",
                   database = "database")

engine = create_engine('mysql://{username}:{password}@l{host}/{database}?charset=utf8'.format(**credentials))
Session = sessionmaker(engine)
meta = MetaData()
abc = Table("abc", meta, autoload_with = engine)

session = Session()
query = (session.query(abc))
df = pd.read_sql(query.statement, query.session.bind)