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Python -M Pip Pycosat Install Packages From

With pip, you can search, download, and install packages from Python Package Index (PyPI) and other package indexes.

This guide explains how to install pip for Python 3 and Python 2 on Ubuntu 20.04.

We will also walk you through the basics of installing and otherwise managing Python packages with pip.

Before You Begin Python comes in two flavors; Python 2 and Python 3.

Starting from Ubuntu 20.04, Python 3 is included in the base system installation, and Python 2 is available for installation from the Universe repository.

When installing a Python module globally, it is highly recommended to install the modules deb package with the apt tool as they are tested to work properly on Ubuntu systems.

Python 3 packages are prefixed with python3- and Python 2 packages are prefixed with python2-.

Use pip to install a module globally only if there is no deb package for that module.

Python Virtual Environments allows you to install Python modules in an isolated location for a specific project, rather than being installed globally.

This way, you do not have to worry about affecting other Python projects.

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Installing pip for Python 3 To install pip for Python 3 on Ubuntu 20.04 run the following commands as root or sudo user in your terminal: sudo apt update sudo apt install python3-pip The command above will also install all the dependencies required for building Python modules.

If you want to install it only for your user, run the command without sudo.

The script will also install setuptools and wheel, which allow you to install source distributions.

Verify the installation by printing the pip version number: pip2 --version The output will look something like this: pip 20.0.2 from usrlocallibpython2.7dist-packagespip (python 2.7) How to Use Pip In this section, we show you a few useful basic pip commands.

With pip, you can install packages from PyPI, version control, local projects, and from distribution files.

To view the list of all pip commands and options, type: pip3 --help You can get more information about a specific command using pip --help.

For example, to get more information about the install command, type: pip3 install --help Installing Packages with Pip Lets say you want to install a package called scrapy which is used for scraping and extracting data from websites.

To install the latest version of the package you would run the following command: pip3 install scrapy To install a specific version of the package append and the version number after the package name: pip3 install scrapy1.5 Replace pip3 with pip2 if using Python 2.

Installing Packages with Pip using the Requirements Files requirement.txt is a text file that contains a list of pip packages with their versions that are required to run a specific Python project.

Use the following command to install a list of requirements specified in a file: pip3 install -r requirements.txt Listing Installed Packages To list all the installed pip packages use the command below: pip3 list Upgrade a Package With Pip To upgrade an already installed package to the latest version, enter: pip3 install --upgrade packagename Uninstalling Packages With Pip To uninstall a package run: pip3 uninstall packagename Conclusion We have shown you how to install pip on your Ubuntu machine and how to manage Python packages using pip.

For more information about pip, visit the pip user guide page.

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