How do you manage python environments using venv? (AI)

Question 1

What is venv and why is it used?

Answer 1

venv (virtual environment) is a standard Python module used to create isolated environments for Python projects. It prevents dependency conflicts between projects by installing packages locally.

Question 2

What is the standard command to create a new virtual environment named my_env?

Answer 2

python3 -m venv my_env (or just python -m venv my_env on some systems). This creates the my_env directory containing a copy of the Python interpreter and support files.

Question 3

What is the command to activate an environment named my_env on Linux/macOS?

Answer 3

source my_env/bin/activate

Question 4

What is the command to activate an environment named my_env on Windows (Command Prompt/PowerShell)?

Answer 4

Command Prompt: my_env\Scripts\activate.bat<br></br>PowerShell: my_env\Scripts\Activate.ps1

Question 5

How do you know a virtual environment is active?

Answer 5

The name of the active environment (e.g., (my_env)) is prepended to your shell prompt.

Question 6

Once an environment is active, what does the pip install command do?

Answer 6

pip install installs packages only into the active virtual environment, not globally on your system.

Question 7

What is the command to deactivate the currently active virtual environment?

Answer 7

deactivate

Question 8

If you delete the my_env directory while the environment is inactive, what happens?

Answer 8

The environment is permanently deleted. There is no need for a special “uninstall” command.

Question 9

What command do you use to share a list of installed packages from your active environment with others?

Answer 9

pip freeze > requirements.txt (This creates a file listing all exact package versions.)

Question 10

What command is used to install all dependencies listed in a requirements.txt file into an active environment?

Answer 10

pip install -r requirements.txt