Can you download multiple versions of python?

You now have two different Python environments and you did it without messing up anything. Hope this tutorial helped you. I wish I had located this link a couple of days earlier. Which is very good! For Windows the process is quite different but equally easy. What to add into those.

Won't upvote this answer only because it's very windows-specific and the question was Linux related, otherwise great info. User no longer exists, I really wanted that batch file — Wargog. This is what I put in my python. See here for the details: stackoverflow. Now you can just run py Update Using asdf These days I suggest using asdf to install various versions of Python interpreters next to each other.

Note1: asdf works not only for Python but for all major languages. If you want to define the global version: asdf global python 3. X -V Python x. X -V pip X. Rotareti Rotareti There seems to be a bug using asdf with poetry: github.

The commands below are for Mac but pretty similar to Linux see the links below Install pyenv brew update brew install pyenv Let's say you have python 3. Kohn Kohn 2, 19 19 silver badges 24 24 bronze badges. How to install different Python versions is indeed OS dependent.

Rodrigue Rodrigue 3, 2 2 gold badges 37 37 silver badges 49 49 bronze badges. No problems so far. Roland pyenv will work for that. Package Managers - user-level For a package manager that can install and manage multiple versions of python, these are good choices: pyenv - only able to install and manage versions of python asdf - able to install and manage many different languages The advantages to these package managers is that it may be easier to set them up and install multiple versions of python with them than it is to install python from source.

Installation from source - system-wide You'll need root privileges for this method. Install any build dependencies.

On Debian-based systems, use: apt update apt install build-essential zlib1g-dev libncurses5-dev libgdbm-dev libnss3-dev libssl-dev libsqlite3-dev libreadline-dev libffi-dev libbz2-dev Choose which python version you want to install. Seth Johnson Seth Johnson What is a package distribution system? Basically it is a tool to install software. I installed anaconda navigator and created two different development environments with different python versions and switch between different python versions by switching or activating and deactivating environments.

Matteo Zanoni Matteo Zanoni 1, 4 4 silver badges 15 15 bronze badges. Now if you need to create a venv for a specific project, cd your-project python3. Mendhak Mendhak 7, 5 5 gold badges 49 49 silver badges 61 61 bronze badges. How this works is that the latest 2. So if you have multiple 2. The same applies for a generic 3: the latest Python version in the 3.

For example, if you have Python 2. In this case, that script will run against Python 2. You could change this operation by:. This probably seems odd behavior but I think the rationale here is two-fold. One is that many people using a Python ecosystem are still stuck in the 2. So a default of Python 2 may make sense. Second is that Unix-based versions tend to rely on symbolic links from python to a specific version and that tends to be a 2.

So I think the Windows launcher is trying to emulate the most likely use case for Python developers, but this can come at the expense of newcomers to Python.

Earlier, in particular with shebang lines, I mentioned there was a caveat that I would mention. That particular caveat is that the new Windows launcher recognizes Unix!

It seems the launcher requires you to follow one of the following patterns:. Another caveat to be aware of is that if there are both shebang lines in the Python script and a version number switch is provided in the command line used to execute that script, the command line version will override that specified in the shebang line. Note that both launchers should have automatically disabled setting the PATH to a location of python. This is important as well.

Another caveat, although a potential useful one, is that the launcher will also let you distinguish between bit and bit versions of Python that are installed. So I can have Python 2. Using the launcher would allow me to distinguish between all of those.

The launcher turns that around and always attempts to use the latest version that it can find on the machine. If you request a version of Python that is not installed, you will get an error message along the lines of Requested Python version 2. Beyond that, I have not found too many other caveats worthy of mention.

If Python is your language of choice, but you are worried about the 2. I think the Python 3 installer installs a pip3 alias for its pip, but you could also do something like py -3 -m pip install requests I think.

Show 3 more comments. Here's my setup: Install both Python 2. Alistair Martin Alistair Martin 5 5 silver badges 5 5 bronze badges.

What about, for example, pip in cli? So you can use pip and pip3 respectively. I was merely pointing out that you'd end up having to rename all these utilities. Even then, there's a risk that things break if, for example, python3 explicitly eg: hard coded calls pip and not pip3. That's a bad idea, would end up renaming everything and pip doesn't work that way. So the pip3 knows the renamed python3.

Show 1 more comment. So to be able to use multiple versions of Python: install Python 2. Ivan Kucerak Ivan Kucerak 4 4 silver badges 5 5 bronze badges. What about people who use IDE's? Does this work for that too? So in case you have multiple Python versions installed just choose the one you want to use in your project. Also terminal in IDE works same as command prompt so those commands should work there too. This is the best solution IMO, it works perfectly from the get-go.

Don't need to have You can have both installed. You should write this in front of your script:! AtilioA 1 1 gold badge 5 5 silver badges 17 17 bronze badges. Patrick Desjardins Patrick Desjardins k 82 82 gold badges silver badges bronze badges.

WEll, it can be installed on Linux, and can be on Windows too. You just need to set the env variable.. This solution won't work with windows unless you call it from a unix style shell eg cygwin. I believe in the example you googled it is being handled by the webserver, not from being launched in windows — Brian.

Yeah, on Apache on Windows Daok : I didn't downvote you. I'm grateful for help even an attempt at help. One can use pylauncher to make something like this work as described in PEP -- Python launcher for Windows in I'm using 2.

Community Bot 1 1 1 silver badge. Roger Pate Roger Pate. See my comment about Patrick Desjardins's answer. Just rename one of them. In my case I renamed it to python3. Can you please elaborate the note part? When I rename python to python3, I can no longer run pip because it seems pip. I don't know I didn't have this problem — Charif DZ. MandarSadye You can open pip.

Then replace python. Here you go If no interpreter is found then the script will be run with 'python.