Python Classroom notes 02/Mar/2026

Python Standard Library

• When we install python, python ships with lots of code
• Most of them are created for reusing
• This is also referred as batteries included.
• Most common usable elements (functions/classes) are referred as builtins
• Prompt

You are an expert in python, i'm learning python.
I want to understand what builtins are  and give me a list of builtin in a table with its purpose and an example usage

Module

• A module in python refers to a file
• If i have created a python file test.py then it is module with name test
• Python standard library is collection of modules.

Lets create a simple module

• A module can act as a library or as an executable
  • executable => run program
  • library => reusable elements
• Refer Here for using a module with imports

In python we have some special variables or methods – dunder methods

• Anything which you see in python with __ double underscores around it , it has a special purpose.
• Prompt

You are an expert in python, i'm learning python.
I want to understand what dunder variables are  and give me a list of dunder variables in a table with its purpose and an example usage

• Refer Here

• Exercise:

  • I want to ask user to enter some value what builtin function can be used
  • I have a variable which is string has a value '10', i want to convert that into int which builtin function can help me
  • Change the prime number python ocde to ask the value from user