Python program to update a table field

Python SQLAlchemy: Exercise-4 with Solution

Write a Python program that updates a student's email in the 'students' table based on their id.

Sample Solution:


from sqlalchemy import create_engine, Column, Integer, String
from sqlalchemy.orm import sessionmaker
from sqlalchemy.ext.declarative import declarative_base
# Create a SQLite database named students.db
engine = create_engine('sqlite:///testdatabase.db', echo=False)
# Create a base class for declarative models
Base = declarative_base()
# Define the Student model
class Student(Base):
    __tablename__ = 'students'    
    id = Column(Integer, primary_key=True)
    studentname = Column(String, nullable=False)
    email = Column(String, nullable=False)
# Create a session to interact with the database
Session = sessionmaker(bind=engine)
session = Session()
def update_student_email(student_id, new_email):
    student = session.query(Student).filter_by(id=student_id).first()
    if student:
        student.email = new_email
        print("Student email updated successfully")
        print("Student with ID {student_id} not found")
# Update a user's email based on their ID
student_id = 22  # Replace with the desired student ID
new_email = '[email protected]'  # Replace with the new email
update_student_email(student_id, new_email)
# Close the session


Student email updated successfully


Flowchart: Delaying Print Output with asyncio Coroutines in Python.

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