How to install all packages in python

How to Manually Install Python Packages?

Python is one of the most famous and powerful languages in the world. It is a dynamically typed, high-level interpreted language intended for general use. Python first made its public appearance in the year 1991, which means it is a fairly old language. It was designed by Guido Van Rossum and developed by a non-profit organization called the Python Software Foundation. Two reasons for its popularity are listed below:

1. Python’s constructs and its support for the multi-paradigm approach support programmers in writing clean & concise code consisting of small logic.
2. The second reason for its worldwide popularity among developers is the amount of community support this language has received. And one of the many benefits of this support has been the availability of over 300,000 packages for python. These packages are the main strength of python because it lets developers do all sorts of things that a language is capable of ranging from simple graphics using Tkinter to making a video out of plain text using the movie.py package.

To use these packages with python it first needs to be installed on the system. There are a couple of ways to do the same. The most popular one is with the help of pip (package manager). But is this article we are going to do it manually without the help of any package manager. Which can be helpful in case the package to be installed is not supported by pip or any other reason.

Step 1: Install Python

So, if we are supposed to install a python module manually the first obvious prerequisite would be to install the Python source code which comes along with its interpreter. To install Python we first, need to visit the website python.org and click on the downloads tab. From the downloads tab, we can get the latest version of python.

Once it is downloading is complete we need to click it open. Now once the installer is opened we can select the option accordingly and proceed by clicking the next button.

At we will be shown the default installation location for python. We can either change it or better leave it as it is. But we need to copy the path so as to use the further steps.

And at last, we can click on the install button.

Once the installation is complete we can open the command-line tool or terminal and run the command below to check the proper installation of the python.

If python has been installed properly it would return the version number.

Step 2: Download Python Package From Any Repository

Once we are done with python installation we can download any python package of our choice. Here we have downloaded pyautogui which is a python package that helps developers instruct and automate certain aspects of GUI such as gesture detection and else.

We are downloading pyautogui package source code from github as a zip file.

Step 3: Extract The Python Package

After we have the zip file of the python package we need to extract it in the location of our choice and search for the main package folder inside, which shares the same name as the package itself.

Step 4: Copy The Package In The Site Package Folder

Once we have found the main package folder from the extracted repository we have to place it in the reach of the python so as to facilitate its interaction. And the location where we need to place this package folder is the site packages folder which one would find in the Lib folder at the location where the python is installed. The address is given below for your convenience:

C:\Program Files\Python39\Lib\site packages

All we need to do is to locate the address above and paste the python package folder there.

Step 5: Install The Package

After placing the package folder in the reach of python that is in the site packages folder, we have to tell python that a package has been served to its reach and it needs to import it for further use. And this can simply be done by running the below command in the terminal.

import "package name" Example: import pyautogui

So the five steps that are mentioned above conclude all that is there in order to import a python package manually without using any package manager.

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Installing Python Modules¶

As a popular open source development project, Python has an active supporting community of contributors and users that also make their software available for other Python developers to use under open source license terms.

This allows Python users to share and collaborate effectively, benefiting from the solutions others have already created to common (and sometimes even rare!) problems, as well as potentially contributing their own solutions to the common pool.

This guide covers the installation part of the process. For a guide to creating and sharing your own Python projects, refer to the distribution guide .

For corporate and other institutional users, be aware that many organisations have their own policies around using and contributing to open source software. Please take such policies into account when making use of the distribution and installation tools provided with Python.

Key terms¶

• pip is the preferred installer program. Starting with Python 3.4, it is included by default with the Python binary installers.
• A virtual environment is a semi-isolated Python environment that allows packages to be installed for use by a particular application, rather than being installed system wide.
• venv is the standard tool for creating virtual environments, and has been part of Python since Python 3.3. Starting with Python 3.4, it defaults to installing pip into all created virtual environments.
• virtualenv is a third party alternative (and predecessor) to venv . It allows virtual environments to be used on versions of Python prior to 3.4, which either don’t provide venv at all, or aren’t able to automatically install pip into created environments.
• The Python Package Index is a public repository of open source licensed packages made available for use by other Python users.
• the Python Packaging Authority is the group of developers and documentation authors responsible for the maintenance and evolution of the standard packaging tools and the associated metadata and file format standards. They maintain a variety of tools, documentation, and issue trackers on both GitHub and Bitbucket.
• distutils is the original build and distribution system first added to the Python standard library in 1998. While direct use of distutils is being phased out, it still laid the foundation for the current packaging and distribution infrastructure, and it not only remains part of the standard library, but its name lives on in other ways (such as the name of the mailing list used to coordinate Python packaging standards development).

Changed in version 3.5: The use of venv is now recommended for creating virtual environments.

Basic usage¶

The standard packaging tools are all designed to be used from the command line.

The following command will install the latest version of a module and its dependencies from the Python Package Index:

python -m pip install SomePackage

For POSIX users (including macOS and Linux users), the examples in this guide assume the use of a virtual environment .

For Windows users, the examples in this guide assume that the option to adjust the system PATH environment variable was selected when installing Python.

It’s also possible to specify an exact or minimum version directly on the command line. When using comparator operators such as > , < or some other special character which get interpreted by shell, the package name and the version should be enclosed within double quotes:

python -m pip install SomePackage==1.0.4 # specific version python -m pip install "SomePackage>=1.0.4" # minimum version

Normally, if a suitable module is already installed, attempting to install it again will have no effect. Upgrading existing modules must be requested explicitly:

python -m pip install --upgrade SomePackage

More information and resources regarding pip and its capabilities can be found in the Python Packaging User Guide.

Creation of virtual environments is done through the venv module. Installing packages into an active virtual environment uses the commands shown above.

How do I …?¶

These are quick answers or links for some common tasks.

… install pip in versions of Python prior to Python 3.4?¶

Python only started bundling pip with Python 3.4. For earlier versions, pip needs to be “bootstrapped” as described in the Python Packaging User Guide.

… install packages just for the current user?¶

Passing the —user option to python -m pip install will install a package just for the current user, rather than for all users of the system.

… install scientific Python packages?¶

A number of scientific Python packages have complex binary dependencies, and aren’t currently easy to install using pip directly. At this point in time, it will often be easier for users to install these packages by other means rather than attempting to install them with pip .

… work with multiple versions of Python installed in parallel?¶

On Linux, macOS, and other POSIX systems, use the versioned Python commands in combination with the -m switch to run the appropriate copy of pip :

python2 -m pip install SomePackage # default Python 2 python2.7 -m pip install SomePackage # specifically Python 2.7 python3 -m pip install SomePackage # default Python 3 python3.4 -m pip install SomePackage # specifically Python 3.4

Appropriately versioned pip commands may also be available.

On Windows, use the py Python launcher in combination with the -m switch:

py -2 -m pip install SomePackage # default Python 2 py -2.7 -m pip install SomePackage # specifically Python 2.7 py -3 -m pip install SomePackage # default Python 3 py -3.4 -m pip install SomePackage # specifically Python 3.4

Common installation issues¶

Installing into the system Python on Linux¶

On Linux systems, a Python installation will typically be included as part of the distribution. Installing into this Python installation requires root access to the system, and may interfere with the operation of the system package manager and other components of the system if a component is unexpectedly upgraded using pip .

On such systems, it is often better to use a virtual environment or a per-user installation when installing packages with pip .

Pip not installed¶

It is possible that pip does not get installed by default. One potential fix is:

python -m ensurepip --default-pip

There are also additional resources for installing pip.

Installing binary extensions¶

Python has typically relied heavily on source based distribution, with end users being expected to compile extension modules from source as part of the installation process.

With the introduction of support for the binary wheel format, and the ability to publish wheels for at least Windows and macOS through the Python Package Index, this problem is expected to diminish over time, as users are more regularly able to install pre-built extensions rather than needing to build them themselves.

Some of the solutions for installing scientific software that are not yet available as pre-built wheel files may also help with obtaining other binary extensions without needing to build them locally.

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