While installling node.js I clicked on the automatically install update and dependencies option , it didn't detect python and automatically installed python 3.11 on my system and probably it has overwritten python 3.10 folder as a result all my libraries are removed python -V gives output as python 3.11 how do I fix this?(I have not yet removed python 3.10)
OS: Windows 10
tried checking django versions command not found even libraries like pandas not visible from cmd
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I've come to a delicate situation:
My company's projects are all based in Python 2.7 and use specific PATH and PYTHONPATH exports to get around each other. The new machine I received has Ubuntu 22.04 and Python 3.10 preinstalled. My previous used to have Python 2.7 and I just installed 3.x on top and it worked just fine, at the beginning. I ended up messing up all the version altogether and everything seemed broken. So now I'm cautious on how to proceed
I've watched numerous tutorials online about setting up a virtual environment and how 'easy' it is to work with multiple version but seems that don't do the trick.
I would like to set up a virtual environment in Python 2.7 where I can just
python setup.py install ....
with all my packages and install them using python 2.7
At the same time, I'd like Python 3 to be available (because I'm futurizing some of these projects) to also install them using Python 3:
python3 setup.py install ...
What is the best strategy to implement this on my machine? Python 2 looks like it's not installed at all. Should I just install it on top of 3.10 ?
I am working on a single project and got my Mac with Python 3.9.6.
For all the relevant packages I need to use I need to use Python 3.7 to make them work (Stellargraph, Tensorflow... )
I have installed pyenv and installed python 3.7.12 and set it to global but when I am checking the version python3 --version I still get 3.9.6.
Please advise how can I safely downgrade Python to lower version.
I tried to install a certain python module that required python 3.6 minimum to work properly so I checked my version using python --version which gave me the output of Python 2.7.17 and then used python3 --version giving me Python 3.6.9. Now, I know for a fact that i have Python 3.8 installed because I ran apt install python3.8 just before checking the version.
If someone wants to know what my system is running; I am currently running Elementary OS 5.1.7 Hera.
EDIT:
(IDK what term to use, I want to say I am done going through answers, and I liked none.)
After a while of whacking my brain, I decided not to uninstall the 3.6 version as It may have version specific modules which if removed may cause other installed programs to break.
Since I just use Linux for my college-work, It wont matter if more than one versions are installed anyway.
Sorry for any mistakes I may have made, I was never good at this kind of things.
Use conda to install and manage different versions of Python (or lots of other software, for that matter). Install different Python versions in separate conda environments. For example:
Find what python versions are available:
conda search python
Output (as of the time of writing, in the future I expect that the latest Python versions will be higher):
Loading channels: done
# Name Version Build Channel
python 1.0.1 0 conda-forge
python 1.2 0 conda-forge
...
python 3.9.0 h88f2d9e_1 pkgs/main
python 3.9.0 ha017127_4_cpython conda-forge
Install the Python versions you need in separate environments. Here, install Python 3.9.0 in environment named python39:
conda create --name python39 python=3.9.0
Switching environments is easy:
conda activate python39
# python is now 3.9.0
conda deactivate
# back to the default python
or (deprecated now):
source activate python39
source deactivate
SEE ALSO:
conda docs: Managing environments
This question is more appropriate for Unix & Linux.
Python installations (more generally, versioned installations of software) co-exist on linux using version numbers. You can likely run Python 3.8 using the python3.8 command (or else, locate where you installed it and run from there / add the location to the PATH environment variable to run directly).
Likewise, for each python version you can install its own package manager (e.g. install pip3.8 by python3.8 -m pip install pip) and use it to install packages for that python version. (As different projects require different sets of packages, the general practice is to create a "virtual environment", i.e. a separate copy of the needed version of python, pip and their package installation folders for each project, and install the required packages there - for more information see e.g. this excellent answer).
Regarding the command python3 (usually /usr/bin/python3) is just a symbolic link, you can replace it with the version you like (as long as it remains compatible with what the system expects - i.e. python3 of version no less than your built-in python3/python3-minimal, otherwise you will probably break something), e.g. assuming which python3 gives you /usr/bin/python3, you can
sudo rm /usr/bin/python3 #remove existing link
sudo ln /usr/bin/python3.8 /usr/bin/python3 # create a new link to the version of your choice
(although a better alternative could be instead aliasing it alias python3='/usr/bin/python3.8' and adding this to ~/.bashrc).
Whatever you do, do not uninstall python3-minimal as it is - at least, on Ubuntu - required by the system and uninstalling or changing it will likely break the system.
I am setting up a new computer and the current latest version of Python is Python 3.4.6. I am trying to update it to version 3.7.0 (the latest version at the time of writing).
I tried pyenv install 3.7.0 and it successfully installed.
But when I type $ python3 --version at the command line it still says Python 3.4.6.
When I type $ which python3 the path it shows is /.pyenv/shims/python3.
Navigating to that path I find that there also exists /.pyenv/shims/python3.7.
How do I point the python command to the newest install?
I know there are a million questions asking how to point python from Python 2.x to Python 3.x. But I have not found one showing how to point from Python 3.old to Python 3.new
I am using Linux OpenSuse.
Use the pyenv global command. In this case, it should be pyenv global 3.7.0. Check out the pyenv commands list for more info.
I'm having trouble with Python 2.7 & 3.5. Right now I use GIT to acquire repositories and their python folders all have 2.7 syntax.
The problem: When i'm attempting to Automate using repositories, my .local/bin nosetests first line of code shows:
#!/usr/bin/python3
so, it checks for
.local/lib/Python3.5/site-packages/nose
Nowhere to be found is a Python 2.7 folder with similar directories to Python 3.5.
So I will always get a syntax error, as its checking my repositories Python coding, and since they are not Python3 syntax, it will give me errors. I checked using command
python -v
python3 -V
and indeed have 2.7 and 3.5 installed.
So I just need guidance/help on how to just gain Python 2.7 site packages with nosetests, so I can automate correctly using the same version as the repositories python. If I left out anything, I will try my best to fill in the gaps/add more details. I will of course troubleshoot.
Nowhere to be found is a Python 2.7 folder with similar directories to Python 3.5.
First, uninstall nosetests for python 3 with pip3 uninstall nose.
Then install nosetests for 2.7 with pip2.7 install nose.
After you do this, the default nosetests should be for python 2.7.
You may want to look into the default python for your project to python2.7 by using virtualenv.