DevOps Classroom notes 08/Oct/2025

dictionary

• dictionary is collection of key value pairs

x = { 'name': 'python' }

functions in python

• A Function is a resuable unit/block of code
• syntax

def <func-name>():
    ....
    ....
    ....

Docstrings

• Docstrings are used to document
  • modules
  • classes
  • functions
• There are many standards of writing docstrings, we will try to follow google’s style guide for python
• Refer Here for notebook

Activity

• Lets create a calculator program
• create a new folder and a new file called as calc.py
• in python module refers to a file in this case the module name is calc

"""Calculator with basic operations.

This module provides simple arithmetic functions such as addition,
subtraction, and multiplication. Each function accepts two integers
and returns an integer result.
"""

def add(a: int, b: int) -> int:
    """Add two integers.

    Args:
        a (int): The first number.
        b (int): The second number.

    Returns:
        int: The sum of `a` and `b`.
    """
    return a + b


def sub(a: int, b: int) -> int:
    """Subtract one integer from another.

    Args:
        a (int): The number to subtract from.
        b (int): The number to subtract.

    Returns:
        int: The result of `a - b`.
    """
    return a - b


def mul(a: int, b: int) -> int:
    """Multiply two integers.

    Args:
        a (int): The first number.
        b (int): The second number.

    Returns:
        int: The product of `a` and `b`.
    """
    return a * b

• calling functions from same module
  • watch classroom recording for debugging
• calling functions from other module
  • Create main.py
  • We need to use import
• import example

import calc

result = calc.add(5,6)
print(result)

result = calc.sub(6,4)
print(result)

• from import

from calc import add

result = add(5,6)
print(result)

• multiple imports

from calc import add, sub

result = add(5,6)
print(result)

result = sub(6,4)
print(result)

• Import with alias

from calc import add as c_add

def add():
    pass

result = c_add(6,5)
print(result)

• Refer Here for changes
• Refer Here for problems solved
• Exercise:
  • create following functions
    • is_prime -> returns bool is_prime(5) => True
    • factors -> returns list[int] factors(20) => [1,2,4,5,10]
    • prime_factors -> returns list[int] prime_factors => [2,5]