Check the versions of Python packages (libraries) | note.nkmk.me (2024)

FAQs

How to check versions of Python packages? ›

The simplest option is to use the __version__attribute to check. However, this option will only work if the package has been installed under a specific version number. Use the __version__ attribute to check the Python package/library, __version__ attribute is recommended by PEP (Python Enhancement Proposals).

To get a list of installed packages in Python, you can use the pip command-line tool with the list command. This will show all packages installed in the current environment.

Python Package Check By using importlib Package

util . In this example, we try to import the 'sys' module using importlib. import_module . If the import is successful, it means that Python is installed, and the message “Python is installed.” is printed.

When a module (or package) includes a version number, the version SHOULD be available in the __version__ attribute. For modules which live inside a namespace package, the module SHOULD include the __version__ attribute. The namespace package itself SHOULD NOT include its own __version__ attribute.

Simply press the Windows key and type "Python". The search results will show the installed version, such as "Python 3.7 (32-bit)" or "Python 2.7 (32-bit)".

TL;DR: You can install a specific version of a Python package using Pip by running the pip install <package_name>==<version> command. For example, to install version 1.3. 4 of Pandas, execute the pip install pandas==1.3. 4 command from the Terminal.

Usually the Python library is located in the site-packages folder within the Python install directory, however, if it is not located in the site-packages folder and you are uncertain where it is installed, here is a Python sample to locate Python modules installed on your computer.

The easiest ways to determine the Python version running in your Jupyter notebook is to use the built-in sys module. The sys module provides access to some variables used or maintained by the interpreter and functions that interact with the interpreter.

Python gives you several different ways to view package content. The method that most developers use is to work with the dir() function, which tells you about the attributes that the package provides. __builtins__ : Contains a listing of all the built-in attributes that are accessible from the package.

You can use the doc() function whenever needed to get quick help. However, you have a better way to study the packages and libraries located in the Python path — the Python Package Documentation. This feature often appears as Package Docs in the Python folder on your system. It's also referred to as Pydoc.

How do I see Python package requirements? ›

A Python installation has a site-packages directory inside the module directory. This directory is where user-installed packages are dropped. A . pth file in this directory is maintained, which contains paths to the directories where the extra packages are installed.

To check all the installed Python modules, we can use the following two commands with the 'pip': Using 'pip freeze' command. Using 'pip list command.

Use print(PyPDF2.__version__) to tell us which version you're using.

For example, if you have both Python 3.8 and Python 3.9 installed, you can check the version of Python 3.9 using the command python3. 9 –version. Python version not displayed: If the command python –version does not display the version information, try using the python -V command instead.

How to check if pip is installed on Windows and Mac: In Command Prompt on Windows or Terminal on Mac, type and enter: pip --version . If pip version is shown then it is installed.