program no 45 in python.................

 To create a Python package containing two or more modules, follow these steps:

1. Create the Package Directory:

Create a directory that will serve as your package. This directory's name will be the package name. For example, create a directory named my_package.

2. Create the Modules:

Inside the my_package directory, create your Python modules (e.g., module1.py and module2.py).

my_package/module1.py:

Python

def greet(name):
    return f"Hello, {name} from Module 1!"

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

my_package/module2.py:

Python

def farewell(name):
    return f"Goodbye, {name} from Module 2!"

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

3. Create the __init__.py File:

Inside the my_package directory, create an empty file named __init__.py. This file signifies to Python that the directory is a package. While it can be empty, it can also be used to define package-level imports or initialization code. 

my_package/__init__.py:

Python

# You can optionally import modules or functions here for easier access
# from . import module1
# from . import module2
# from .module1 import greet, add
# from .module2 import farewell, multiply

4. Using the Package:

Now you can use your package in another Python script. Create a file (e.g., main.py) outside the my_package directory.

main.py:

Python

# Import specific functions from modules within the package
from my_package.module1 import greet, add
from my_package.module2 import farewell, multiply

print(greet("Alice"))
print(f"Sum: {add(5, 3)}")

print(farewell("Bob"))
print(f"Product: {multiply(4, 6)}")

# You can also import the entire module and access its functions
# import my_package.module1
# print(my_package.module1.greet("Charlie"))

Directory Structure:

Code

.
├── my_package/
│   ├── __init__.py
│   ├── module1.py
│   └── module2.py
└── main.py

When you run main.py, it will import and utilize the functions defined within module1.py and module2.py of your my_package.