Understanding the Python Interpreter: What is it and How it Works?

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Python is one of the most popular programming languages because of its ease of use, readability, and robust features. The Python Interpreter is one of the key elements that make all Python programs work. The Python Interpreter is a program that reads, processes, and executes Python code.

How the Python Interpreter Works?

The Python interpreter takes a series of steps to execute your code.

1. Lexical Analysis (Tokenization)

• Interpreter breaks your code into tokens
• Eg., y = 8 + 3 becomes ['y', '=', '8', '+', '3'].

2. Parsing

•  Tokens are arranged into an Abstract Syntax Tree (or AST). This checks Syntax errors.

3. Compilation to Bytecode

• The Abstract syntax tree (or AST) is converted into bytecode, which is a low-level, platform-independent representation of the code.

4. Execution by the Python Virtual Machine (PVM)

• Python Virtual Machine is the run-time environment that executes the Python code.