Python Virtual Environments & pip

Manage project dependencies.

✍️ 3 exercises + code challenge in this lesson

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Real projects depend on third-party packages. pip installs them from the Python Package Index (PyPI).

Virtual environments

A virtual environment keeps each project's packages separate, so projects don't conflict:

Create: python -m venv .venv
Activate on Windows: .venv\Scripts\activate; on macOS/Linux: source .venv/bin/activate
Install: pip install requests
Save the list: pip freeze > requirements.txt
Reinstall elsewhere: pip install -r requirements.txt

In the browser editor, pure-Python packages can be installed with micropip, as the example shows.

Key Takeaways: Python Virtual Environments & pip

Mastering Python Virtual Environments & pip helps you write clean and reliable Python code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.

Python Virtual Environments & pip Code Example

Python

import micropip
await micropip.install("emoji")

import emoji
print(emoji.emojize("Python is :fire: and :snake:!"))

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Python Virtual Environments & pip Practice Exercises

Check what you learned in “Python Virtual Environments & pip”.

/ 3 solved

Fill in the blank

Create a virtual environment named .venv.

python -m  .venv

✓ Correct! Not quite. Try again.

Multiple choice

Which command saves the installed packages to a file?

pip freeze > requirements.txt pip save pip list --save python packages > file

✓ Correct! Not quite. Try again.

Code challenge

Import the built-in statistics module and print the mean of [2, 4, 6].

Write the code in the live editor. Your answer is checked automatically.

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Python Virtual Environments & pip

Virtual environments

💡 Key Takeaways: Python Virtual Environments & pip

Python Virtual Environments & pip Code Example

Python Virtual Environments & pip Practice Exercises

Key Takeaways: Python Virtual Environments & pip