Class and Object in Python
Classes combine related data and behavior and act as reusable blueprints for objects.
What is Class and Object?
Classes combine related data and behavior and act as reusable blueprints for objects.
Define a Python class, create an object, and call an instance method.
When should you use it?
- Learn Python syntax through a practical example.
- Build a foundation for larger programming problems.
- Test an idea quickly without a local setup.
Example code
main.py
class Course:
def __init__(self, name, lessons):
self.name = name
self.lessons = lessons
def describe(self):
return f"{self.name}: {self.lessons} lessons"
course = Course("Python Basics", 12)
print(course.describe())Expected output
Python Basics: 12 lessonsHow it works
The initializer stores constructor arguments on each instance. The describe method reads that instance state.
Change the values and run the program in the CodeUtility online Python compiler without installing Python locally.
Practice exercises
Modify the runnable example with the exercises below to build understanding beyond copying the result.
- Change the input and predict the output before running.
- Handle empty or invalid input.
- Wrap the logic in a function and add more test cases.