Lecture Notes: Coding with Python Lecture

Introduction

• Overview of the course: Introduction to Python programming
• 20 hands-on projects included
• Final project: Weather app fetching real-time data from an API
• Basic setup: Python interpreter and IDE (PyCharm recommended for beginners)

Python Setup

• Download Python interpreter from python.org
• Add Python to system path
• Install an IDE like PyCharm (Community Edition recommended) or VS Code
• PyCharm: JetBrains website, select Community Edition

First Python Program

• Create a new Python project and file (e.g., main.py)
• Print statements: print("I like pizza")
• Comments with #: Used for notes within the code

Basics: Variables

• Variables: Containers for values
• Data types: Strings, Integers, Floats, Booleans
• Assign and print variables
• Concatenate strings using f-strings

Type Casting

• Convert data types: int(), float(), str(), bool()
• Example: Convert GPA from float to integer

User Input

• Use input() function to accept user data
• Type casting inputs for calculations, e.g., converting input to int
• Exercise: Calculate area of a rectangle

String Manipulation

• Use of various string methods like capitalize(), upper(), lower()
• Manipulate and validate strings

Math Functions

• Basic arithmetic and built-in functions from the math module
• Using import math for mathematical constants and functions
• Exercises: Calculate circumference and area of a circle

Conditional Statements

• if, else, and elif for decision making
• Boolean expressions for conditions

Loops

• while and for loops for iteration
• Use break and continue to control loop execution
• Practical example: Countdown timer

Functions

• Definition and invocation of functions
• Function parameters and return values
• Example project: Basic calculator using functions

Object-Oriented Programming (OOP)

• Classes and objects: Basic concepts and definitions
• Attributes and methods
• Inheritance and polymorphism
• Example: Car class with attributes and methods

File Handling

• Reading and writing to files in different formats (txt, JSON, CSV)
• Example: Writing a shopping cart program

Error Handling

• Use of try, except, and finally for exception handling

Graphical User Interface (GUI) with PyQT5

• Setting up a basic GUI application
• Widgets like QLabel, QPushButton, QLineEdit
• Layouts: QVBoxLayout, QHBoxLayout, QGridLayout

API Integration

• Making requests with the requests library
• Example project: Weather app integrating with an API

Conclusion

• Completion of the weather app as a final project
• Encouragement to continue exploring and building projects in Python