VENV

VENV is a built-in module in Python that allows you to create isolated environments for your Python projects. It provides a clean and separate space where you can install packages and dependencies without affecting your system's global Python installation.

Creation

To create a new virtual environment, follow these steps:

1. Open a terminal or command prompt.

2. Navigate to the directory where you want to create your virtual environment.

3. Run the following command:

   python -m venv myenv

   This command creates a new virtual environment named myenv in the current directory.

Activation

To activate the virtual environment, depending on your operating system, use one of the following commands:

• On macOS and Linux:

  source myenv/bin/activate

• On Windows:

  myenv\Scripts\activate

Once activated, your terminal prompt will change, indicating that you are now working within the virtual environment.

Deactivation

To deactivate the virtual environment, depending on your operating system, use one of the following commands:

deactivate

This command deactivates the current virtual environment and returns you to your system's default Python environment.

Usage

After activating the virtual environment you can use pip to manage packages, Here are some of the most commonly used commands

• Install a package:

  pip install package_name

• Upgrade a package:

  pip install --upgrade package_name

  Use this command to upgrade an already installed package to the latest version within the virtual environment.

• Uninstall a package:

  pip uninstall package_name

• List installed packages:

  pip list

• Export the environment to a requirements file:

  pip freeze > requirements.txt

  This command saves a list of all installed packages and their versions into a file named requirements.txt. You can use this file to share or replicate the exact environment on another machine.

• Check the Python interpreter version:

  python --version

• Check the path to the Python interpreter:

  which python