Python Course Overview

Introduction

• Instructor: Mosh
• Focus: Learning Python programming basics.
• Python's popularity: Used in automation, AI, web applications, etc.
• Course Structure: Core concepts followed by three projects.

Project Details

1. Website for Grocery Store
   • Homepage shows products.
   • Admin area for stock management.
   • Built using the Django framework.
2. Machine Learning Project
   • Predicts music preferences based on profiles (like YouTube recommendations).
3. Automation Project
   • Automates repetitive tasks (e.g., processing spreadsheets).

Audience

• Suitable for all ages; beginners welcome.
• Easy to learn with hand-holding approach.
• Plenty of exercises included for practice.

Installing Python

1. Download:
   • Go to python.org.
   • Click on Downloads; choose the latest version (e.g., Python 3.7.2).
2. Installation:
   • Windows: Check "Add Python to PATH" during installation.
   • Mac: Follow setup wizard instructions to install.

Installing PyCharm (Code Editor)

1. Download from jetbrains.com/pycharm.
2. Installation Steps:
   • Windows: Follow installation wizard.
   • Mac: Drag to Applications.
3. First Run:
   • Choose "Do not import settings" and "I've never used PyCharm".

Writing Your First Python Program

• Create a new project "Hello World".
• Create a new Python file app.py.
• Write a simple program:

  print('I am Mosh Hamedani')
  

• Run the program to see output.

Drawing Shapes in Python

• Additional print statements to draw shapes:

  print('o----')  # Dog's head and body
  print(' |  |')  # Legs
  

• Output: Drawing shapes using strings.

Learning Python Variables

• Variables store data in memory:

  price = 10
  

  • Access using variable name (e.g., print(price)).
• Data Types:
  • Integers, Floats, Strings, Booleans.

Getting User Input

• Use input() function:

  name = input('What is your name? ')
  print(f'Hi {name}')
  

Error Handling

• Use try and except to handle errors:

  try:
      age = int(input('Enter your age: '))
  except ValueError:
      print('Invalid value')
  

Creating Functions

• Define reusable code blocks:

  def greet_user(name):
      print(f'Hello {name}')
  greet_user('Mosh')
  

Classes and Objects

• Classes define new types:

  class Point:
      def __init__(self, x, y):
          self.x = x
          self.y = y
  

Inheritance

• Allows new classes to inherit from existing ones:

  class Dog(Mammal):
      def bark(self):
          print('Woof')
  

Modules and Packages

• Organize code into files:
  • Module: A single file.
  • Package: A directory of modules.

Working with Files

• Use Path object from pathlib for file system operations:

  from pathlib import Path
  my_file = Path('example.txt')
  

Introduction to Machine Learning

• Steps in a machine learning project:
  1. Import data.
  2. Clean data.
  3. Split data into training/testing.
  4. Create and train a model.
  5. Make predictions.
  6. Evaluate accuracy.

Conclusion

• Support Mosh's work by liking and sharing videos.
• Upcoming project: Building a web application using Django.