Lo-Fi Python

Enter This in Your Terminal

python -m pip install pandas

Pandas is a super useful library for wrangling spreadsheet data, AKA "tabular" data. If successful, you should see activity that looks similar to the below screenshot, where I am installing openpyxl, an additional Python Excel library you'll likely want. You are good to go! This is the part where you get to feel like Neo! See Installing Python Modules in the Python Documentation for more detailed instructions.

To view all your installed libraries, enter:

pip list

Write a "requirements.txt" of installed libraries:

pip freeze > requirements.txt

You can list your outdated packages with the --outdated argument:

pip list --outdated

Use pip's -h help command line argument:

pip -h

View your system and user pip config settings:

pip config debug

Supplementary Resources

• Take a look at this list of 20 modules to get started. Here is another more comprehensive list of libraries you can now install.
• Swing by the pip documentation Quickstartand User Guide to learn some helpful commands.
• PyPI, the Python Package Index is the official Python package repository.
• Why you should use 'python -m pip'
• pip cheat sheet from opensource.com

Congrats on figuring out how to install packages with pip, have fun!

Having issues? Try upgrading your pip version.

python -m pip install --upgrade pip

Try the ensurepip command.

This command will install and upgrade pip to the newest version. New in Python 3.4:

python -m ensurepip --upgrade

"The ensurepip package provides support for bootstrapping the pip installer into an existing Python installation or virtual environment. This bootstrapping approach reflects the fact that pip is an independent project with its own release cycle, and the latest available stable version is bundled with maintenance and feature releases of the CPython reference interpreter."

- ensurepip Python Documentation

You should follow best practice and create a virtual environment before installing libraries. venv or virtualenv. To create with venv:

python3 -m venv add_env_name_here

After your environment is created, activate it with the first command below, then install a library on Ubuntu Linux:

source add_env_path_here/bin activate
python -m pip install pandas

Alternatively, on Windows computers:

cd add_env_path_here\scripts & activate
python -m pip install pandas

Getting the prefix right can be tricky.

In the install command, the prefix is a reference to your Python executable. You may just need to alter your prefix to call it correctly. Here are some to try in place of "python". Observe what happens when you run these command variations. Good luck!

python3 -m pip install pandas
python3.11 -m pip install pandas
py -m pip install pandas
pip3 install pandas

How to Manually Enable the pip Installer

The rest of this post may be useful to you if you are:

1. Working on legacy Python 2 or < 3.3 for which pip is not installed.
2. Seeking to fix a faulty pip install that is not working properly.
3. Curious to know how to manually set up pip.

Assumes Python is already installed. If you're running Windows 10, I found it easy to install Python from the Windows store. Download the get-pip.py file. Go to the link, right click the page and "Save As" a .py file to download. Then place the file where you want to access it. I placed mine in C:Python27Libsite-packages

You could also download the file with curl:

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.pyt-pip.py

If you are not sure where your site-packages folder is, type python -m site into command prompt for file path ideas.

Run the get-pip.py file.

Using command prompt's cd command with a Windows "&" operator to run the Python file in a Windows command prompt:

cd c:\Python27\Lib\site-packages & python get-pip.py

Or Linux terminal:

cd /Python27/Lib/site-packages && python get-pip.py

You should see some activity in command prompt that shows installation/updating of "setup" and "wheel". When it finishes, you have installed pip.

Type into command prompt at the same location:

python -m pip install requests

This installs the Requests module into your Python libraries. Requests is an http module which is highly regarded almost universally by the Python community.

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