But without this I would have been banging my head thinking my code was bad. However, Ubuntu comes with python both python 2 and python 3 already installed in the correct location, where it will find the installed packages. Then to see what third party modules are available, just run: pip freeze Or even pip list And both will show you all modules installed and their versions. For instance, on a shared host. Do you want to know all the Python version installed on your system? You can choose any of the commands which you find easy for parsing the output package list and get the information.
This list contains packages that come pre-installed with Python and some are installed explicitly. In particular, you should always install Setuptools and pip, as it makes it much easier for you to use other third-party Python libraries. Programmatically: try: import foo except ImportError: do whatever you wanted if foo is missing Note that this doesn't actually tell you foo is missing, just that it couldn't be imported. I can see pygame and beautifulsoup in that list. Simply type import You see an error if module is missing.
Note that the --user flag has no effect when inside a virtual environment - all installation commands will affect the virtual environment. If you have 2 or more python 3. Would you like to answer one of these instead? Do you want to continue? There are similar features going back to 3. Managing multiple virtual environments directly can become tedious, so the introduces a higher level tool, , that automatically manages a separate virtual environment for each project and application that you work on. So a general recommendation is to try not to mix installation methods like this. First, a comment at the top: For Debian and derivatives, this sys.
Related Read: Python vs Shell Scripting For more detail about any specific module, run command. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 on this site the. I did so with a mashup of ideas from this page. Selecting previously unselected package python3-distutils. To see if pip is installed, open a command prompt and run Virtual Environments A Virtual Environment is a tool to keep the dependencies required by different projects in separate places, by creating virtual Python environments for them. If you are looking to safely install global command line tools, see. It should dump all the module names as one really big Python list.
If I could upvote this more than once I would. This is a program that reads Python 2 code and transforms it into valid Python 3 code. Do you have any questions or comments about this article? Done Building dependency tree Reading state information. One can also use pydoc modules, which can be filtered with grep to find a specific module. Delivery powered by Google Feedburner. Once installed, you can download, install and uninstall any compliant Python software product with a single command.
Caveats I have noticed a strange behaviour of this technique - when the Python interpreter is invoked in the same directory as a setup. You don't need to install any additional package for listing it, but you need to manually search or filter the required module from the list. In which case, the way to test it is to import them. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 on this site the. For example pip show numpy will return the following or alike: Name: numpy Version: 1. A package can contain multiple modules and module's names might not match the package name.
Several top universities around the globe use Python to introduce students to programming. They explain how the Debian distribution of Python is different. You can also use to make it easier to manage your virtual environments. If you have any questions about this article, please comment. In recent Python I think 3. The official name and name that pip shows is with dashes, not dots. I guess I could check if there's a directory on the system that's created during the installation, but I feel like there's a better way.
For more understanding, you can check the. Sometimes you have app name collisions. I'm trying to make sure the Skype4Py package is installed, and if not I'll install it. You can find table listing of all such command. If you already have parsing code for any of the output from two commands, you can use that command.