Python is a popular programming language that is widely used for various purposes, such as web development, data analysis, machine learning, and more. But how does Python code actually work? How does the computer understand and execute the instructions written in Python? So without wasting time read this article, to explore the basic steps that happen when we write and execute a Python program.
1. Writing Python code:
We use a text editor or an integrated development environment (IDE) to write Python code in a file with a .py extension. For example, we can write a simple program that prints "Hello, world!" to the screen:
printf("Hello World!")
2. Compiling Python code:
When we run a Python program, the Python interpreter first compiles the code into bytecode, which is a low-level representation of the program that can be executed by the Python virtual machine (PVM). The bytecode is stored in a file with a .pyc extension.
3. Executing Python code:
The PVM then executes the bytecode by following the instructions one by one. The PVM is responsible for managing the memory, handling errors, and providing access to built-in modules and libraries. For example, the PVM executes our program by calling the print function from the built-in module sys and writing the string "Hello, world!" to the standard output stream.
As we can see, Python code works and runs on a computer by going through three main steps: Writing, Compiling, and Executing. By understanding these steps, we can have a better idea of how Python works under the hood and how to optimize our code for better performance and readability.
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