Python Morsels: Installing Python packages

Table of contents

1. Our program depends on a third-party package
2. Installing packages using pip
3. Avoid installing packages globally
4. Another project with a third-party dependency
5. Creating a new virtual environment
6. Installing packages into a virtual environment
7. Other Python package management tools
8. Use pip and venv when installing Python packages

Our program depends on a third-party package

Here we have a program called name.py:

importrequestsprint(requests.get("https://pseudorandom.name").text.strip())

importrequestsprint(requests.get("https://pseudorandom.name").text.strip())

This program doesn't work right now:

$ python3 name.py
Traceback (most recent call last):
  File "/home/trey/name.py", line 1, in<module>
    import requests
ModuleNotFoundError: No module named 'requests'

$ python3 name.py
Traceback (most recent call last):
  File "/home/trey/name.py", line 1, in<module>
    import requests
ModuleNotFoundError: No module named 'requests'

It doesn't work because it uses the requests module, which isn't included with Python. This is a popular module that's included in the requests package, that you can install from the Python Package Index by using a tool called pip which comes bundled with Python.

Installing packages using pip

We can use pip by …