Python find what modules are installed

How to Easily See All Python Modules Installed on Your System

Learn how to easily see all Python modules installed on your system with this comprehensive guide. Explore different methods, including package managers and commands like ‘pip list’ and ‘pip freeze’.

• Package Managers for Listing Installed Python Packages
• Using ‘help(’modules’)’ Command in IPython Shell
• How To List Installed Python Packages using pip command form
• ‘pip list’ Command to List All Installed Python Packages
• ‘pip freeze’ Command to List All Installed Packages and Their Versions
• Other Helpful Commands for Listing Installed Python Packages
• Other simple code samples for viewing all installed Python modules
• Conclusion
• How do I see all Python modules installed?
• How can I get a list of installed modules?
• How do I see all installed pip packages?
• How do I find where Python packages are installed?

Python is a popular programming language that offers a wide range of packages and modules for various applications. However, it can be challenging to keep track of all the installed modules on your system. This article provides a comprehensive guide on how to see all Python modules installed on your system.

Package Managers for Listing Installed Python Packages

Package managers are tools that can be used to list Installed Python Packages. There are several popular package managers that can be used for this purpose, including Pip, Pipenv, Anaconda Navigator, and Conda.

Pip

Pip is a command-line tool for installing and managing Python packages that can be used to list all installed packages and their versions. To see all installed packages using Pip, open a terminal or command prompt and enter the following command:

This will display a list of all the installed packages, along with their specific version and location. Python packages installed using the pip command are stored under the /usr/local/lib/ /dist-packages/pip/ directory in Linux.

Pipenv

Pipenv is a tool that provides virtual environments for python projects and can be used to list installed packages. To see all installed packages using Pipenv, navigate to the project directory and enter the following command:

This will display a list of all the installed packages, along with their dependencies and version numbers.

Anaconda Navigator

Anaconda Navigator is a graphical user interface (GUI) for managing packages and can be used to list globally and locally installed packages. To see all installed packages using Anaconda Navigator, open the application and navigate to the Environments tab. This will display a list of all the installed packages in the selected environment, along with their dependencies and version numbers.

Conda

Conda is a cross-platform package manager and environment management system that can be used to list installed packages. To see all installed packages using Conda, open a terminal or command prompt and enter the following command:

This will display a list of all the installed packages, along with their dependencies and version numbers.

Using ‘help(’modules’)’ Command in IPython Shell

The ‘help(’modules’)’ command can be used in the IPython shell to list all installed modules and their versions. To use this command, open an IPython shell and enter the following command:

This will display a comprehensive list of all the installed modules, including built-in modules and third-party modules. The modules are listed alphabetically and can be scrolled through using the arrow keys.

How To List Installed Python Packages using pip command form

In this video, you will see How To List Installed Python Packages using pip command form Duration: 1:02

‘pip list’ Command to List All Installed Python Packages

The ‘pip list’ command is a popular method for listing all installed Python packages. This command can be used in the terminal or Python shell to list all the installed packages, along with their specific version and location. Python packages installed using the pip command are stored under the /usr/local/lib/ /dist-packages/pip/ directory in Linux.

By default, the ‘pip list’ command shows the packages installed in Python 2.7. However, it can be used with a specific version of Python to show packages installed in that version. For example, to see packages installed in Python 3.8, enter the following command:

The ‘pip freeze’ command can be used to list all installed packages and their versions, which can also be used to recreate the environment on another machine. This command generates a list of all the installed packages and their versions in a format that can be used in requirements files. The ‘pip freeze’ command is commonly used for sharing project dependencies with other developers.

To use the ‘pip freeze’ command, open a terminal or command prompt and enter the following command:

This will display a list of all the installed packages and their versions.

Other Helpful Commands for Listing Installed Python Packages

There are several other commands that can be used to list installed python packages, including the ‘show your_package’ command and the ‘sys.path()’ command.

The ‘show your_package’ command can be used to find the installation location of a package. To use this command, open a terminal or command prompt and enter the following command:

This will display information about the package, including its installation location.

The ‘sys.path()’ command in Python can be used to show all the paths for Python, including where modules are stored. To use this command, open a Python shell and enter the following command:

This will display a list of all the paths that Python searches for modules.

Other simple code samples for viewing all installed Python modules

# this will show where numpy is installed pip show numpy

In Python as proof, list all installed Python modules code sample

Conclusion

In conclusion, there are multiple ways to list all Python modules installed on your system, including using package managers, the ‘help(’modules’)’ command, ‘pip list’ command, and ‘pip freeze’ command. It is important to keep track of installed packages and modules for efficient development and troubleshooting. best practices for managing python packages include using virtual environments and requirements files, and common issues with python packages include version conflicts and package dependency issues. By following the methods outlined in this article, you can easily see all Python modules installed on your system and ensure that your Python projects are running smoothly.

Frequently Asked Questions — FAQs

What is the importance of keeping track of installed Python modules?

Keeping track of installed Python modules is crucial for efficient development and troubleshooting. This ensures that your code runs smoothly and minimizes the chances of encountering errors caused by missing or incompatible modules.

How can I find the installation location of a specific Python package?

You can use the ‘show your_package’ command to find the installation location of a package. This is useful when you need to modify or remove a package from your system.

What are some best practices for managing Python packages?

Best practices for managing Python packages include using virtual environments and requirements files. Virtual environments allow you to isolate dependencies and ensure that your code runs consistently across different systems. Requirements files make it easy to share and reproduce your project dependencies.

What are some common issues with Python packages?

Common issues with Python packages include version conflicts and package dependency issues. Version conflicts occur when different packages require different versions of the same module. Package dependency issues occur when a package requires another package that is not installed or is incompatible with other installed packages.

How can I recreate an environment with the same installed packages on another machine?

You can use the ‘pip freeze’ command to generate a list of all the installed packages and their versions in a format that can be used in requirements files. You can then use this file to recreate the environment on another machine.

Can I use ‘pip list’ to show packages installed in a specific version of Python?

Yes, you can use the ‘python -3.8 -m pip list’ command to show packages installed in a specific version of Python. Replace ‘3.8’ with the desired version number.

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How to find Python List Installed Modules and Version using pip?

Do you want to know all the Python version installed on your system?

I have also recorded a video with a live demo. You can watch or else continue reading.

The main strength of the Python is, the wide range of external libraries are available. As we keep coding in Python, we install many packages. It is easy getting a Python list installed modules on the system. There are a couple of ways you can do that.

Following are the two ways that will work for you to get this list…

1. Using help() function (without pip):

The simplest way is to open a Python console and type the following command…

This will gives you a list of the installed module on the system. This list contains modules and packages that come pre-installed with your Python and all other you have installed explicitly.

Here is an example of running help function on my system (Python version 2).

You don’t need to install any external module to get this list with help() function. But this command does not give you any other information about the package.

If you want to know the version of each installed modules, you can use pip program.

2. Using pip to find Python list installed modules and their Versions:

To find the list of Python packages installed on the system, you can use pip program.

Those who don’t know about pip, it is the best program which is used to install and to manage other Python packages on your system. For more understanding, you can check the complete guide for managing Python modules using pip.

If you have the latest version of Python, pip comes preinstalled with Python.

Run following commands on the command line (not on Python console). You get the complete list of installed Python modules with their versions.

Here is an example of listing Python package you have installed on your system using the pip tool.

Unlike help function, it does not list down preinstalled Python packages.

You can see all the Python packages followed by their version.

Note: Before running this command, ensure if there is a pip installed on your system. For Python version 2.7+ and 3.4+, it comes pre-installed with Python.

The format of the output list of both commands is totally different. Suppose you are using these command in shell scripting. You can choose any of the commands which you find easy for parsing the output package list and get the information.

If you already have parsing code for any of the output from two commands, you can use that command.

Related Read: Why you should learn Shell scripting? (Python vs Shell Scripting)

For more detail about any specific module, run command.

It returns the name of the module/package, version, author, author email, license, location of the installed module and requires.

You can get the author’s email. You can reach out to the author for any specific query related to the Python package.

If you are using python code for commercial purpose, knowing the package’s license is important.

How to Check if Python module is installed?

You can use pip commands with grep command to search for any specific module installed on your system.

For instance, you can also list out all installed modules with the suffix “re” in the module name.

How to count the number of Python modules installed on your system?

You can use wc (word count) command.

Note: grep and wc commands only work with Linux based systems.

What is the use of these commands?

• You can use these commands to list out all the installed modules on your system. Later you can use this list to set up a new identical environment.
• If you face any issue in installed Python package, running these commands make debugging easier.
• Knowing Python module version, you can update the module if a new version of the module is available.

In an upcoming article, I will share, how you can write a Python program to get a list of Python packages and save them in a list.

If you find these commands useful for Python list installed modules, share with your friends. Feel free to write a comment if you have any question regarding handling Python packages.

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