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我是python的新手,我刚刚学会了如何使用flask restless和flask sql-alchemy创建一个api.但是我想用随机值为数据库播种.我该如何实现这一目标？请帮忙.这是api代码......

import flask
import flask.ext.sqlalchemy
import flask.ext.restless
import datetime

DATABASE = 'sqlite:///tmp/test.db'

#Create the Flask application and the FLask-SQLALchemy object
app = flask.Flask(__name__)
app.config ['DEBUG'] = True
app.config['SQLALCHEMY_DATABASE_URI'] =  DATABASE
db = flask.ext.sqlalchemy.SQLAlchemy(app)

#create Flask-SQLAlchemy models
class TodoItem(db.Model):
    id = db.Column(db.Integer, primary_key = True)
    todo = db.Column(db.Unicode)
    priority = db.Column(db.SmallInteger)
    due_date = db.Column(db.Date)

#Create database tables
db.create_all()

#Create Flask restless api manager
manager = flask.ext.restless.APIManager(app, flask_sqlalchemy_db = db)

#Create api end points
manager.create_api(TodoItem, methods = ['GET','POST','DELETE','PUT'], results_per_page = …

我试图用来bulk_insert将数据插入servicesPostgres数据库中的现有表（）中。如何实例化该表对象，以便可以对其进行bulk_insert？

我看到了这样的答案：将 Alembic bulk_insert插入具有模式的表，但我想避免在迁移中再次重新定义模式。

from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects import postgresql


def upgrade():
    """Up migration."""


services = sa.MetaData().Services()

op.bulk_insert(services,
    [   
        {
        'id': 88,
        'name':'Test 1',
        'is_active': 'true',
        'include_in_broker_fee': 'true',
        'is_domestic': 'true',
        'is_international': 'true'
        },
        {
        'id': 89,
        'name':'Test 2',
        'is_active': 'true',
        'include_in_broker_fee': 'true',
        'is_domestic': 'true',
        'is_international': 'true'
        }
   ])