Write steps to create a package. Apply these steps to create a package named volume and create 3 modules in it named cube, cuboid and sphere, having function to calculate volume of the cube, cuboid and sphere respectively. Import the modules defined in the package and use the defined functions for calculation of volume respectively.

Creating a package in Python or C involves several steps to organize code into reusable, manageable components. A package typically contains multiple modules, each designed to perform specific tasks. In this scenario, we will create a Python package named "volume" with three modules—"cube", "cuboid", and "sphere"—each having a function to calculate the respective volume. We will first describe the steps in Python, then briefly cover the process in C.

### Steps to Create a Package in Python

1. Create a Directory for the Package:
   First, we need to create a directory named `volume` to store the modules. This directory will serve as our package container.
   
   ```bash
   mkdir volume
   cd volume
   ```

2. Create a `__init__.py` File:
   Inside the `volume` directory, create a special file called `__init__.py`. This file makes Python treat the directory as a package. This file can be empty or contain package-level initialization code.

   ```bash
   touch __init__.py
   ```

3. Create Modules:
   Next, we need to create the individual modules inside the package. For each module, we will define a function to calculate the volume of the respective shape.
   
   - Cube Module:
     Create a file named `cube.py` inside the `volume` directory. This module will contain a function `calculate_volume` to compute the volume of a cube.

     ```python
     # volume/cube.py
     def calculate_volume(side_length):
         return side_length 3
     ```

   - Cuboid Module:
     Create a file named `cuboid.py`. This module will define a function `calculate_volume` to compute the volume of a cuboid, which is the product of its length, width, and height.

     ```python
     # volume/cuboid.py
     def calculate_volume(length, width, height):
         return length * width * height
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