Modules in Python

1. Understanding Python Modules

Generally and in programming thus Python, a  module in Python is a file that contains Python code. It is a way to organize Python code so that it can be reused across multiple Python scripts or applications. Each module can contain a set of functions, classes, and global variables that can be accessed from any script that imports that module.

Here’s an example of a Python module:

# my_module.py

def add(a, b):
return a + b

def subtract(a, b):
return a – b

2. Importing Python Modules

To use the functions or classes defined in a module, you need to import the module. The import statement in Python is used to import a module.

Here’s an example of how to import the my_module module:

import my_module

result = my_module.add(1, 2)
print(result) # Output: 3

result = my_module.subtract(5, 3)
print(result) # Output: 2

3. Using from ... import ... Syntax

You can also import specific functions or classes from a module using the from ... import ... syntax. This allows you to directly use the imported functions or classes without needing to use the module name as a prefix.

Here’s an example of how to import the add and subtract functions from the my_module module:

from my_module import add, subtract

result = add(1, 2)
print(result) # Output: 3

result = subtract(5, 3)
print(result) # Output: 2

4. Importing * (All) from a Module

If you want to import all the functions and classes defined in a module, you can use the from ... import * syntax.

Here’s an example of how to import all the functions and classes from the my_module module:

from my_module import *

result = add(1, 2)
print(result) # Output: 3

result = subtract(5, 3)
print(result) # Output: 2

Please note that importing all the functions and classes from a module can potentially cause naming conflicts and make your code harder to understand. It’s generally recommended to import only the specific functions or classes that you need.

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