Introduction

Introduction#

Python is a popular and easy-to-learn programming language. Whether you’re new to coding or looking to expand your skills, Python is a great place to start.

✨ What Can Python Do?#

🌐 Web Development: Create web applications on a server.
🔄 Automation: Build workflows and automate tasks.
🗄️ Data Handling: Connect to databases, read, and modify files.
📊 Big Data & Math: Handle big data and perform complex calculations.
⚙️ Prototyping: Quickly create prototypes or production-ready software.
🤖 Machine Learning: Develop, train, and deploy machine learning models.
…and a lot more!

💡 Why Choose Python?#

💻 Cross-Platform: Works on various platforms (Windows, Mac, Linux, Raspberry Pi).
📝 Easy Syntax: Simple syntax that resembles the English language.
⏱️ Efficient Coding: Write programs with fewer lines of code.
🚀 Quick Prototyping: Runs on an interpreter, allowing immediate code execution.
🧠 Versatility: Supports multiple programming styles: procedural, object-oriented, or functional.

📚 How Python Runs a Program#

1. Writing the Code 📝#

Write your Python code in a .py file. This code is written in a human-readable format, using Python’s easy-to-understand syntax.

2. The Python Interpreter 🐍#

Upon execution, the Python interpreter comes into play. The interpreter is like a translator that reads your Python code and converts it into something the computer can understand.

3. Lexical Analysis 🔍#

The interpreter first performs lexical analysis. It breaks your code down into tokens (like keywords, variables, operators, etc.). It’s like breaking a sentence into words and punctuation.

4. Parsing 📚#

Next, the interpreter checks if your code follows Python’s rules (syntax). This step creates a parse tree or an Abstract Syntax Tree (AST), which organizes the tokens into a structure that makes sense.

5. Bytecode Compilation ⚙️#

The AST is then converted into bytecode. Bytecode is a lower-level representation of your code. This bytecode is what Python actually executes.

6. Python Virtual Machine (PVM) 🖥️#

The bytecode is sent to the Python Virtual Machine (PVM), which is a part of the Python interpreter. The PVM reads the bytecode and performs the instructions, which makes the program run.

Python Execution Flow