OOP & classes
Classes, instances, methods, dataclasses, and object-oriented design in Python.
Design a Data Helper Class in Python
Create a simple Object-Oriented data helper with DataPoint and Dataset classes that store, describe, and summarize coordinate points.
class DataPoint:
def __init__(self, x, y):
self.x = x
self.y = y
self.label = None
def describe(self):
"""Return a human-readable description of the data point."""
base = f"DataPoint(x={self.x}, y={self.y})"
return f"{base}, label='{self.label}'" if self.label e…How to Build a Data Helper Class in Python with OOP
Create a beginner-friendly Python class that loads CSV data, filters records by field, and counts entries using object-oriented programming.
class DataHelper:
"""A beginner-friendly OOP helper for handling simple datasets."""
def __init__(self, filename):
self.filename = filename
self.data = self._load_data()
def _load_data(self):
"""Load data from a CSV file into a list of dictionaries."""
import csv
…How to Define a Simple Class with __init__ and __repr__ in Python
Defines a Person class with __init__ to store name and age, and __repr__ to give a readable string representation.
class Person:
def __init__(self, name, age):
self.name = name
self.age = age
def __repr__(self):
return f"Person(name='{self.name}', age={self.age})"
if __name__ == "__main__":
p1 = Person("Alice", 30)
p2 = Person("Bob", 25)
print(p1)
print(p2)Browse by section
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OOP & classes — Python code examples
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This page collects oop & classes snippets — short, copy-ready Python you can paste into our free online IDE and run without installing anything. Each sample includes a plain-English explanation and the full source code.
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