It creates a “virtual” isolated Python installation. Install Python 3 using homebrew (brew install python) or by manually installing the package from the official website. This functionality intends to replace most uses of pkg_resources entry point API and metadata API. load_in_4bit and not version. Specifically, it works with distributions with discoverable dist-info or egg-info directories, and metadata defined by the Core metadata specifications. 9 from source on Ubuntu, but Python could not find the packages I had previously installed. Packages can be installed programmatically for use in a Deephaven instance or added to Oct 11, 2021 · Created on 2021-10-11 06:06 by daveraja, last changed 2022-04-11 14:59 by admin. Jul 23, 2025 · Working on Python projects may require you to list the installed Python packages in order to manage dependencies, check for updates, or share project requirements with others. toml file according to the specification of the PyPA. 5. Feb 2, 2024 · Instantly share code, notes, and snippets. __loader__. path to import your package and run python -m pytest to execute the tests against the local copy directly. Always required when the project section is 2 days ago · Python code in one module gains access to the code in another module by the process of importing it. py install, which leave behind no metadata to determine what files were installed. get_resource_reader(). The project section The project section of the pyproject. Discover various methods, including using the __version__ attribute, pkg_resources, pip commands, and importlib. SourceFileLoader object. find_loader Python documentation was deprecated in favour of importlib. Along with importlib. The Python Package Index is a public repository of open source licensed packages made available for use by other Python users. What this does is to add the package directory, such that Python files in the package directory are visible as global imports. Jan 22, 2022 · When installing a package using --editable, pip creates an . Package Discovery and Resource Access using pkg_resources ¶ The pkg_resources module distributed with setuptools provides an API for Python libraries to access their resource files, and for extensible applications and frameworks to automatically discover plugins. Let us look at some of the easy ways in which we can make sure all our packages are available in our system before use. Jan 28, 2022 · Learn how to install modules in Python 3 and import them using `import`, `from import`, and `import as`. This issue is now closed. 1 day ago · Three, the package contains modules exposing additional functionality for managing aspects of Python packages: importlib. This guide discusses how to install and use Python packages in Deephaven. metadata – Accessing package metadata The initialization of the sys. Nov 30, 2016 · For some scripting and automation without installing the package, where pip, easy_install and even setuptools don't provide command line options or public APIs for reading all metadata (e. Is there a way in Python to list all installed packages and their versions? I know I can go inside python/Lib/site-packages and see what files and directories exist, but I find this very awkward. The full list of modules described in this chapter is: zipimport Jan 9, 2026 · File "C:\Ai\New_Portable\Portable\python_embeded\Lib\site-packages\transformers\utils\quantization_config. “Resources” are file-like resources associated with a module or package in Python. 3 days ago · The modules described in this chapter provide new ways to import other Python modules and hooks for customizing the import process. How package/modules loading in Python works The list of directories from which Python tries to load the module is given by the variable sys. Jan 9, 2026 · File "C:\Ai\New_Portable\Portable\python_embeded\Lib\site-packages\transformers\utils\quantization_config. 12 is the newest major release of the Python programming language, and it contains many new features and optimizations. 12. Jul 17, 2023 · When you use a Python package, you may want first to check a package's version that Incorta is using. We covered fundamental concepts, usage methods using pip, pkg_resources, and importlib. For older Python versions, there's a backport importlib_metadata: 31. Jun 22, 2022 · Bug report If I install rich in a temporary directory and then add that directory to sys. 8, the standard library has got a way of querying the environment for installed distributions and their metadata: importlib. Jul 23, 2025 · The importlib package is primarily utilized by Python applications for dynamic imports during runtime. name The name of the package. But as you continue to install more and more modules, it might get a bit tricky Python import system is a fundamental feature that enables code organization, reuse, and modular programming. Common Practices Jun 10, 2016 · I have looked around and do not see a solution for this. g. It also provides runtime support for using C extensions that are inside zipfile-format eggs, support for merging packages that have Dynamic Imports Using importlib Example: Factory Method With Namespace Packages Example: A Package of Plugins The Python Import System Import Internals Example: Singletons as Modules Reloading Modules Finders and Loaders Example: Automatically Install From PyPI Example: Import Data Files Import Tips and Tricks Handle Packages Across Python Versions It won't create a virtual environment for a specific python version, but for the latest version (check with python --version) you have installed. abc – Abstract base classes for resources importlib. I looked at these: List all the modules that are par 1 day ago · Three, the package contains modules exposing additional functionality for managing aspects of Python packages: importlib. metadata. egg-link file to find your package's . find_spec. One is to provide the implementation of the import statement (and thus, by extension, the __import__() function) in Python source code. Dec 5, 2024 · Learn various ways to retrieve a list of installed Python modules on your local system using Python scripts, pip commands, and other tools. e. Nov 14, 2025 · In this blog post, we have explored several methods to view all the Python libraries installed on your system. This provides an implementation of import which is portable to any Python interpreter. parse ( ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^ File "importlib\metadata_init. Create and Use Virtual Environments ¶ Create a new virtual environment ¶ venv (for Python 3) allows you to manage separate package installations for different projects. The import statement is the most common way of invoking the import machinery, but it is not the How to Check if a Package is Installed (and Install if Needed) in Python When writing Python scripts or applications that depend on external packages, it's often useful to check if a required package is actually installed in the user's environment before attempting to import it. How do I get a list of which installed files are associated with this package? In this tutorial, you'll learn about the Python pip and how to use it to manage third-party Python packages. The pip list and pip freeze commands are simple and easy to use, while the pkg_resources and importlib_metadata modules provide programmatic ways to access package information. Using pip list command Jan 6, 2026 · A full list mapping the top level names available for import to the distribution packages that provide those import packages and modules may be obtained through the standard library’s importlib. Mar 11, 2025 · This tutorial demonstrates how to find the version of a module installed in Python. Then import the package and use its __version__ attribute to print the installed version, like this:” import pandas as pd print (pd. Note Run poetry check to print warnings about deprecated fields. In this article, you'll learn how to check the Python package's version in Incorta Notebook. 1 day ago · importlib — The implementation of import importlib. test_suite), here's a little hacky way: Jun 24, 2022 · Explore 7 methods to include non-Python resource files into the Python package - along with handy examples - and enjoy reading them within a running script. Dynamic Imports Using importlib Example: Factory Method With Namespace Packages Example: A Package of Plugins The Python Import System Import Internals Example: Singletons as Modules Reloading Modules Finders and Loaders Example: Automatically Install From PyPI Example: Import Data Files Import Tips and Tricks Handle Packages Across Python Versions Nov 29, 2025 · Learn how to quickly check installed Python packages and versions. This article will show you everything you need to get this installed in your Python environment. Python really tries to intelligently determine the contents of this variable, depending on the operating system and how Python is installed and which Python version is used. 2 days ago · Python code in one module gains access to the code in another module by the process of importing it. toml [pytest] pythonpath = ["src"] ini Note If you do not use an editable install and not use the src layout (mypkg directly in the root directory) you can rely on the fact that Python by default puts the current directory in sys. So I tried two methods as follows: Oct 11, 2021 · Created on 2021-10-11 06:06 by daveraja, last changed 2022-04-11 14:59 by admin. This module leverages Python’s import system to provide access to resources within packages. Library Link How to Install importlib-metadata on Windows? Type "cmd" in the search bar and hit Enter to open the command line. Mar 11, 2014 · Three, the package contains modules exposing additional functionality for managing aspects of Python packages: importlib. " is printed. Packages can be installed programmatically for use in a Deephaven instance or added to Jan 26, 2023 · Hi there I want to make a list of all installed packages (no matter whether importable or not). I am able to trigger this with a rel A package by the name of importlib has a module called util which has a function called find_spec which can also help to find if a package is installed or not without importing the package. Therefore, if you change your modules, you must restart the interpreter – or, if it’s just one module you want to test interactively, use importlib. org, I generally avoid the Microsoft store. ├── package │ ├── __init__. 4 is the latest maintenance release, containing more than 250 bugfixes, build improvements and documentation changes since 3. packages_distributions cannot see rich (even though it can see dependencies of rich Sep 9, 2021 · I installed python3-pip in my WSL2 using sudo apt-get install python3-pip and after installing it I ran the command pip list and I saw it already have packages installed. distributions() returns an iterable of all installed distributions, and we access the Name metadata key to get the package names. Script wrappers installed by python setup. Installed packages attrs== Mar 20, 2024 · The problem involves retrieving a list of locally installed Python modules, utilizing Python’s standard library to execute a command that fetches this information, and then parsing the output to 23 Update With Python 3. iter_modules() to discover all modules and packages installed under that namespace: If you don’t use an editable install and are relying on the fact that Python by default puts the current directory in sys. 7 and newer (backported as importlib_resources for older versions of Python), this can eliminate the need 5 days ago · Learn to build and install Python from source on Linux. Follow this step: Open the Python interpreter by typing python in the command prompt. This naturally raises the question - how does Python know where to find packages when you call import? May 27, 2015 · I've installed a Python package using pip, which is a replacement for easy_install. This step-by-step 2026 guide covers dependencies, optimization, and managing multiple versions. py", line 987, in version What's a good way to check if a package is installed while within a Python script? I know it's easy from the interpreter, but I need to do it within a script. __version__) Pandas Version 3. packages_distributions() function. metadata operates on third-party distribution packages installed into Python’s site-packages directory via tools such as pip. Now, every time I create a new virtual environment, all these packages are already there. Along the way, you'll create your own set of namespace packages and explore how you might be able to use them in your own projects. distributions() i How to uninstall all Python packages installed with pip? I have recently installed Python on my new computer. version ("bitsandbytes")) >= version. How to Check if a Package is Installed (and Install if Needed) in Python When writing Python scripts or applications that depend on external packages, it's often useful to check if a required package is actually installed in the user's environment before attempting to import it. 4 importlib. The recommended method is the importlib. pth file in your site-packages dir that points to the source dir, which by defaults contains your . Jun 28, 2024 · When calling importlib_resources. 3. ) or binary files (such as images). Compatibility New features are introduced in this third-party library and later merged into CPython. 7 or older, you'll have to install the importlib_metadata backport): Oct 1, 2024 · I installed python from python. Apr 5, 2025 · Here, importlib. Pure distutils packages installed with python setup. py develop. When you switch projects, you can create a new virtual environment which is isolated from other virtual environments. egg-info metadata. reload(modulename). It’s important to note that the term “package” in this context is being used to describe a bundle of software to be installed (i. 3. This package supplies third-party access to the functionality of importlib. path to import your package, you can execute python -m pytest to execute the tests against the local copy directly, without using pip. ) However, this list is not complete, since it does not contain built-in modules and your own modules. path module search path Python Language Services ast — Abstract syntax trees (Use python -m pip freeze if you have multiple Python versions and want to be sure you list the packages for the same version as python. What I would like to do is get a list of all packages available in Python at run-time. I would like to install the modules 'mutagen' and 'gTTS' for my code, but I want to have it so it will install the modules on every computer that doesn't have them, but it won't try to install them if they're already installed. 7. import_module. If the import fails, it means that Python is not installed, and the message "Python is not installed. Sep 28, 2021 · The Python importlib-metadata library is among the top 100 Python libraries, with more than 65,535,044 downloads. contents() to list the "module resources" but it will work only if you imported your package in the "normal" way and your loader is _frozen_importlib_external. 7, Windows dev environment, not using a virtualenv per pr How does python find packages? // under Python I just ran into a situation where I compiled and installed Python 2. py ├── README. egg-info. It also offers a programmatic way to interact with the import system, enabling dynamic imports and manipulation of the import process. as a synonym for a distribution). Nov 29, 2025 · Pythonでインストールされているパッケージやバージョンの確認方法をわかりやすく解説します。pipコマンドの使い方や依存関係の確認、仮想環境・Anaconda環境ごとのポイント、よくある質問まで丁寧にまとめました。初心者から中級者まで必見のガイドです。 In non-package mode, the name and version fields are required if using the project section. Here's documentation showing all the available pip list options, with several good examples. Dec 27, 2012 · In Python 3. This guide covers pip commands, dependency checks, tips for virtual and Anaconda environments, and common FAQs—ideal for beginners to intermediate users. importlib. Feb 27, 2023 · Methods to Check if Python Package is Installed There are many ways in which we can check our packages in python. 8, it's possible using only the standard library (when using Python 3. resources provides routines for accessing non-code “resources” from Python packages. py", line 568, in post_init if self. . I guess I could check if there's a The importlib module provides a framework for the import statement, allowing for the importing of modules in Python. In this post, we'll look at numerous techniques for listing the Python packages that are installed on your system. I would also like to be able to generate a Linux version of this program after I get it figured out. csv from within mymodule. 6 days ago · Added in version 3. Aug 27, 2025 · Import Libraries in Python Use reliable import patterns, install missing packages, and avoid common pitfalls when working with modules and packages. 1. 5 days ago · importlib. The problem I met is that after package install the result of calling importlib. Aug 27, 2020 · Do you ever store files alongside your Python files, and want to read them from within a running Python script? Using import works great on Python modules and packages, but import will not work on non-Python data files, such as text files (including JSON, HTML, csv, etc. path. I guess I could check if there's a Feb 1, 2011 · How to enumerate all imported modules? E. What is the most efficient way to list all dependencies required to deploy a working project elsewhere (on a different OS, say)? Python 2. You benefit from the virtual environment since importlib_metadata is a library which provides an API for accessing an installed package's metadata, such as its entry points or its top-level name. Jan 6, 2026 · For example, if you make the sub-package myapp. Apr 25, 2025 · In this blog post, we explored different ways to list installed Python modules. py How can/should I get the file path of data. I would like to get ['os', 'sys'] from this code: import os import sys Jul 23, 2025 · In this example, we try to import the 'sys' module using importlib. Introduction The purpose of the importlib package is two-fold. next: Missing installation of triton, ok just pip install triton-windows Sep 11, 2025 · We can access this attribute to find the version of the installed package. util. resources vs __file__ Dec 21, 2025 · Project description Library to access the metadata for a Python package. This worked just fine with the older pkg_resources package, as it references the . files("sample-namespace") to retrieve a text file, an exception is thrown if an editable install has been done for the package. reload(), e. To complete @Metal3d answer, yes you can do testpkg. in └── setup. What's a good way to check if a package is installed while within a Python script? I know it's easy from the interpreter, but I need to do it within a script. import importlib; importlib. metadata including improvements added to subsequent Python versions. Mar 12, 2012 · Python 3. 4, which either don’t provide venv at all, or aren’t able to automatically install pip into created environments. plugins a namespace package then other distributions can provide modules and packages to that namespace. py as a Path object so that I can then open the file however I like? Note, I’m specifically not asking how Mar 11, 2014 · importlib. metadata presents access to metadata from third-party distributions. The resources may be contained directly in a package, within a subdirectory contained in that package, or adjacent to modules outside a package. py │ ├── data │ │ └── data. egg-link file and an easy-install. To show what's installed in only the virtual environment (not global packages), use pip list --local. In this tutorial, you'll be exploring Python namespace packages: what they are, what they're for, and how you can use them in your package systems. Sep 12, 2023 · Python, somewhat similar ot Node, uses a system of installed modules/packages. Nov 4, 2025 · Explore various techniques to list installed Python packages, from using built-in commands like 'pip freeze' and 'help ("modules")' to programmatic approaches with pkg_resources and importlib. 2 days ago · Note For efficiency reasons, each module is only imported once per interpreter session. In layman's terms, it allows the user to load modules as he/she discovers them. resources. Although my intension was to make a virtual environment for every project, I somehow forgot to activate one before installing a bunch of packages. rst ├── MANIFEST. metadata is a library that provides access to the metadata of an installed Distribution Package, such as its entry points or its top-level names (Import Package s, modules, if any). Apr 18, 2024 · I have a script, which manages client user packages via UI and can install/uninstall them. To Nuitka these will not be resolvable, unless we help it. csv │ └── mymodule. Oct 31, 2022 · Suppose I have a package structure like . Jan 6, 2026 · Installing Packages ¶ This section covers the basics of how to install Python packages. The import statement is the most common way of invoking the import machinery, but it is not the You have a large Python project and want to share some Pydantic models (or any Python classes) with another service without: Publishing your entire codebase Manually copying files and fixing imports Maintaining a separate package by hand PyDistill automates this: point it at your entry points, and Nov 14, 2025 · Conclusion In this blog post, we have explored several methods to view all the Python libraries installed on your system. parse (importlib. If the import is successful, it means that Python is installed, and the message "Python is installed. 1 day ago · It allows virtual environments to be used on versions of Python prior to 3. resources – Package resource reading, opening and access importlib. resources in Python 3. py", line 987, in version 5 days ago · Learn to build and install Python from source on Linux. path, importlib. Nov 1, 2019 · With the latest Python 3. Once installed, you can use pkgutil.

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