Python Modules

1) Import Built-in Module

Import the math module and print the value of π (math.pi).

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2) Using math Functions

Import math and use sqrt() to compute the square root of a number entered by the user.

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3) Alias a Module

Import math as m and use it to compute cos(0).

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4) Import Specific Function

From math, import only factorial and use it to compute factorial of a number.

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5) Random Number Generation

Import the random module and print a random integer between 1 and 10.

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6) Random Choice

Ask the user to input 5 items separated by spaces; use random.choice() to pick one at random.

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7) Module from Standard Library

Import the datetime module and print the current date.

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8) Time Module

Import time and print the current timestamp using time.time().

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9) Help on Module

Use help() to print documentation for math.sqrt.

(This can be run interactively.)

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10) Create Your Own Module

Create a file mymath.py with a function add(a, b) that returns the sum. Then import and use it.

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11) Multiple Function Module

Extend mymath.py to also include multiply(a, b) and use both functions in another file.

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12) Module with Default Argument

In your module, write greet(name, msg="Hello") and use it.

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13) Import All Functions

Use:

from mymath import *

and call both functions without module prefix.

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14) Nested Module Call

In a second file, import your own module twice (alias one import) and call its functions.

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15) Circular Import (Understanding Scope)

Create two modules that import each other; run and observe the error.

(This helps understand import behavior.)

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16) Use os Module

Import the os module and print the current working directory using os.getcwd().

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17) Use math with Loops

Use math.ceil() and math.floor() on a list of decimals.

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18) Random Shuffle

Ask user for a list of 5 items and shuffle them using random.shuffle().

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19) Module with Global Variables

In your custom module, define a variable VERSION = 1. Import it and print it.

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20) Module Reload

Use the importlib.reload() function to reload your own module after changing it.

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📝 Concepts Covered

Concept	What You Practice
Importing Modules	import math
Aliasing	import math as m
From-Import	from math import sqrt
Built-in Modules	random, time, datetime, os
Custom Modules	Create & use your own .py
Reloading Modules	Using importlib.reload()

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📌 Example Template

Using math

import math

num = float(input("Enter number: "))
print("Square root:", math.sqrt(num))

Simple mymath.py Module

# mymath.py
def add(a, b):
    return a + b

def multiply(a, b):
    return a * b

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canvil: 333f6c7d-6876-4f7e-b6ad-1bdb2233f5c1