set up sqlalchemy in python

To use SQLAlchemy in Python, you need to follow these steps:

Install SQLAlchemy package using pip


main.py
pip install sqlalchemy
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Import necessary classes and functions from sqlalchemy package


main.py
from sqlalchemy import create_engine, Column, Integer, String
from sqlalchemy.orm import sessionmaker
from sqlalchemy.ext.declarative import declarative_base
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Set up a database connection engine


main.py
engine = create_engine('mysql+mysqlconnector://username:password@localhost/mydatabase')
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Replace username, password and mydatabase with appropriate values for your database.

Define your data model using SQLAlchemy ORM


main.py
Base = declarative_base()

class User(Base):
    __tablename__ = 'users'
    id = Column(Integer, primary_key=True)
    name = Column(String(50))
    email = Column(String(50))
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Create database tables if doesn't already exists


main.py
Base.metadata.create_all(engine)
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Create a session object to interact with the database


main.py
Session = sessionmaker(bind=engine)
session = Session()
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Use session object to perform database operations like insert, update, delete


main.py
user = User(name='John Doe', email='john.doe@example.com')
session.add(user)
session.commit()
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This will insert a new user record into the users table in the database.

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