CodeForCrack - Python Modules

Importing Built-in Modules

🔹 Use the import statement to include built-in Python modules.


import math

print(math.sqrt(16))  # Output: 4.0

🔸 You can import specific functions or variables using from ... import ....


from math import pi, pow

print(pi)          # Output: 3.141592653589793

print(pow(2, 3))   # Output: 8.0

🔹 Use as to rename modules or functions when importing.


import numpy as np

arr = np.array([1, 2, 3])

print(arr)

🔹 Create your own Python file (module) and import it.

For example, create mymodule.py:


# mymodule.py

def greet(name):

    print("Hello, " + name)

Then import and use it in another file:


import mymodule

mymodule.greet("Alice")

🔹 Python searches for modules in the directories listed in sys.path.


import sys

print(sys.path)

🔸 Make sure your user-defined module is in one of these directories or the current working directory.