Develop Reference

Why can I not run matplotlib on Python 3.10?

My Issue. I am trying to run matplotlib on python 3.10 on my MacOS, but I get the following error:
ModuleNotFoundError: No module named 'matplotlib'
However, when I try running
pip install matplotlib
then I get back
Requirement already satisfied: cycler>=0.10 in ./.local/lib/python3.9/site-packages (from matplotlib) (0.10.0)
Requirement already satisfied: numpy>=1.16 in ./mambaforge/lib/python3.9/site-packages (from matplotlib) (1.21.2)
Requirement already satisfied: kiwisolver>=1.0.1 in ./.local/lib/python3.9/site-packages (from matplotlib) (1.3.2)
Requirement already satisfied: pyparsing>=2.2.1 in ./.local/lib/python3.9/site-packages (from matplotlib) (2.4.7)
Requirement already satisfied: pillow>=6.2.0 in ./.local/lib/python3.9/site-packages (from matplotlib) (8.3.2)
Requirement already satisfied: python-dateutil>=2.7 in ./.local/lib/python3.9/site-packages (from matplotlib) (2.8.2)
Requirement already satisfied: six in ./mambaforge/lib/python3.9/site-packages (from cycler>=0.10->matplotlib) (1.16.0)
Also, in response to
python3 --version
terminal says
Python 3.9.6
Also, I am able to use matplotlib just fine if I compile my code using Python 2.7.16 on Sublime Text 3.
My Question. How can I get matplotlib to run on Python 3.10?
Since I am still new to Python (or to programming, for that matter), please let me know if I should provide additional information.
Note: I have already looked at this and this, but I couldn't fix the issue.

I have had the same issue. It wasn't only for MatPlotLib, but Pandas and NumPy.
From seeing what the terminal tried to do, it seems that 3rd party libraries are not "compatible" yet. I am using my older version of python now.
When trying to get the libs, it just scrolled through all the versions of matplotlib, and gave errors. It might take some time before this is resolved.

I recently experienced this problem after installing Python 3.10.
Use version Python 3.9. That worked for me, but I can't figure out how to install matplotlib on 3.9 via the command line, but I'm using PyCharm right now, so I got it to work on there.
proof of installation
If you figure out how to install it via the command line, let me know! I'm using two versions of Python. I would like to know how to do it as well. I'm sure I can find it eventually. I believe if you uninstall Python 3.10 and leave only 3.9, it will work.

I found a temporary (unstable) fix for anyone desperate to run matplotlib (and many other packages, e.g. numba, scikit-learn, scipy, etc.) on Python 3.10 for Windows 10, as described by Amit Thinks. Amit uses a source of unstable binaries curated by Christoph Gohlke at UC Irvine, so these are likely not malware infested.

I faced the same issue , while trying to install matplotlib for python 3.10 .
i faced 2 issues
1)It said wheel module not installed (installed via running pip install wheel)
2)It said it required microsoft visual c++ 14.0+ (it was already present when checked in control panel(x64)) (after installing wheel module while running the code[pip install matplotlib] for 3rd time). asked me to download visual studio community 2019 and build tools.... Did so.
And now i was able install matplotlib in python 3.10 and runs fine (when cheking in control panel there was another visual c++ 14.0+ installed (x86) along with (x64),dont know why it works only when x86 version of visual c++ is installed.

if you are using conda enviroment:
conda install -c conda-forge matplotlib

I think it does run on Python 3.10. When you are querying for a graph or plot, try doing this:
import matplotlib.pyplot as plt

I had same issues with matplotlib,pandas,numpay etc on python 3.10 on window 10.
I install with windows binaries packages.
after download "matplotlib‑3.4.3‑cp310‑cp310‑win_amd64.whl"
use this commond:
pip install matplotlib-3.4.3-cp310-cp310-win_amd64.whl

ModuleNotFound Python

In my Macs Terminal I'm not able to use Python packages as I get a ModuleNotFound error. This is not the case in VS code, as I tried all kinds of things, including a venv based from a tutorial, and it seemed to work.
When I run pip install requests I get the following:
Requirement already satisfied: requests in /Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages
(2.25.1)
Requirement already satisfied: chardet<5,>=3.0.2 in /Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages
(from requests) (4.0.0)
Requirement already satisfied: urllib3<1.27,>=1.21.1 in /Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages
(from requests) (1.26.5)
Requirement already satisfied: idna<3,>=2.5 in /Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages
(from requests) (2.10)
Requirement already satisfied: certifi>=2017.4.17 in /Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages
(from requests) (2020.12.5)
When I run python --version I get Python 3.9.5
I've spend hours now trying to get this "environment" up and correctly running, but with not much success.

The problem is that you have multiple Python versions installed. One possibly from the official Python website, and one through Homebrew (I'm guessing a bit). These interfere somewhat.
Here's the thing though: the "official" one didn't not install the standard python alias. It only installed the more explicit python3 command. Oddly (and confusingly) enough, it did install pip, probably alongside pip3.
When you type python, the shell will find the one installed by Homebrew; the other one doesn't not exist. When you explicitly type python3, you'll get the correct one. It looks like your PATH environment variable is set up to have the "official" installation come first, and then the Homebrew one.
So, best and easiest is to simply use python3 explicitly.
You could attempt to uninstall the Homebrew one in /usr/local/ if you want to and don't think you need it.
You could also tinker inside the /Library/Frameworks/Python.framework/Versions/3.9/bin and make an alias for python, but I wouldn't recommend it, unless you become more familiar with the shell, Python installations and your system. And after all, it's only one character more to type currently.

ModuleNotFoundError: No module named 'pandas' in vs code

When I'm trying to import pandas in vs code, I have the following error:
ModuleNotFoundError: No module named 'pandas'
I went to cmd and typed: pip3 install pandas and it got successfully installed showing following message:
Requirement already satisfied: pandas in c:\users\nitis\anaconda3\lib\site-packages (1.1.3)
Requirement already satisfied: python-dateutil>=2.7.3 in c:\users\nitis\anaconda3\lib\site-packages (from pandas) (2.8.1)
Requirement already satisfied: pytz>=2017.2 in c:\users\nitis\anaconda3\lib\site-packages (from pandas) (2020.1)
Requirement already satisfied: numpy>=1.15.4 in c:\users\nitis\anaconda3\lib\site-packages (from pandas) (1.19.2)
Requirement already satisfied: six>=1.5 in c:\users\nitis\anaconda3\lib\site-packages (from python-dateutil>=2.7.3->pandas) (1.15.0)
Please suggest what to do

There are a couple different ways that this can happen.
You are using a Python 2 Interpreter in VSCode
You are using a Python 3 installation which isn't Anaconda.
To solve this, I would recommend checking which python interpreter you are using using the following steps:
Go to View >> Command Palette >> Search for Python: Select Interpreter
Then check which interpreter you are using.

According to the information you provided, the reason is that the environment used in the lower left corner of VS Code is different from the terminal. You could use the following methods:
Method 1. Since the module "pandas" is installed in "Anaconda", please select the "conda" environment in the lower left corner of VS Code to ensure that the Python environment used is the same as that of the terminal.
Method 2. Use the shortcut key Ctrl+Shift+` to open a new VS Code terminal, it will automatically enter your currently selected Python environment (the lower left corner of VS Code). Then we can install the module "pandas" in the this environment.
check:
We can use the command "pip --version" to check the source of the module installation tool "pip", the module is installed in this location:
The command "pip show pandas" can check whether the module installation location is consistent with the Python environment displayed in the lower left corner of VS Code:
Reference: Python environment in VS Code.

Its because of PYTHONPATH issue . if you try to install pip install "module",it says that already satisfied but ,when you run the program the error occurs as modulenotFoundError In vscode, So I did uninstall the python interpreter ,and reinstall in specific path so that I can remember.
And go to environment variable ,path variable add new path ,where you installed python.exe and also add scripts and sitepackages. and also go to system variable ,path variable see if path is already added or not ,otherwise add it there too.
Restart the vscode It should work.
And I also run command in commandprompt as pip install "module".
It did work for me.

pip is only instaling to the default python instaltion how can i chnage it

i created a new project in pycharm. it created a new installation of python in a folder called myproject\vin.
pip will allways go to the default installation at
c:\\python64bit,
not c:\test\vin
example in my if i go import pandas it says that module does not exist.
if i go pip install pandas, it says
You should consider upgrading via the 'python -m pip install --upgrade pip' command.
PS C:\Users\tpottel\programming\java\eclipse projects\BBitBotCoinUsing2\untitled1\venv\Scripts> pip install pandas
Requirement already satisfied: pandas in c:\python64bit\lib\site-packages (0.25.0)
Requirement already satisfied: python-dateutil>=2.6.1 in c:\python64bit\lib\site-packages (from pandas) (2.8.0)
Requirement already satisfied: numpy>=1.13.3 in c:\python64bit\lib\site-packages (from pandas) (1.17.0)
Requirement already satisfied: pytz>=2017.2 in c:\python64bit\lib\site-packages (from pandas) (2019.2)
Requirement already satisfied: six>=1.5 in c:\python64bit\lib\site-packages (from python-dateutil>=2.6.1->pandas) (1.1
c:\python64bit is the default location
How can I change the installation pip will update? to
C:\Users\tpottel\programming\java\eclipse projects\BBitBotCoinUsing2\untitled1\venv\Scripts>

There are probably a few ways you might find more robust for managing multiple python installations on one machine such as creating a virtual environment (https://www.freecodecamp.org/news/installing-multiple-python-versions-on-windows-using-virtualenv/) but ignoring that, here's one way you could go about it.
There's two facts you'll need to know and work around for this, firstly, I think you'll need to make sure that you second python installation is added to path in order to call 'pip' from your terminal/command line.
Second is that python searches through installations in order, by finding the python.exe file. This means that with:
pip install pandas
which, it's worth nothing is shorthand for:
python -m pip install pandas
it will find the first python.exe based on a hierarchy and install to there, which is why you're not able to install to your second distribution.
If you rename the second distributions .exe to something like 'python64.exe' you can call it specifically with
python64 -m pip install pandas
hopefully that should help! Again, there might be a better way of acheiving this, but this is one method that should work.

djangocms: command not found

I installed django cms by this command
$ sudo pip3 install django-cms
the installation is completed and returns this:
Requirement already satisfied: django-cms in /usr/local/lib/python3.6/dist-packages
Requirement already satisfied: django-classy-tags>=0.7.2 in /usr/local/lib/python3.6/dist-packages (from django-cms)
Requirement already satisfied: django-formtools>=1.0 in /usr/local/lib/python3.6/dist-packages (from django-cms)
Requirement already satisfied: Django<2.0,>=1.8 in /home/amir/.local/lib/python3.6/site-packages (from django-cms)
Requirement already satisfied: djangocms-admin-style>=1.0 in /usr/local/lib/python3.6/dist-packages (from django-cms)
Requirement already satisfied: django-sekizai>=0.7 in /usr/local/lib/python3.6/dist-packages (from django-cms)
Requirement already satisfied: django-treebeard>=4.0.1 in /usr/local/lib/python3.6/dist-packages (from django-cms)
However, when I want to use djangocms it returns
djangocms: command not found
I use Python 3.6 and django 1.9.5 (I know it is an old version but the project belongs to my company and they use this version).

http://docs.django-cms.org/en/release-3.4.x/introduction/install.html
My guess is you forgot to run: pip install djangocms-installer
I'm guessing that because I did that too. I installed pip install django-cms, then wondered why it didn't work.

Just ran into this and got it solved. Afterwards my palm went to my face because I was like "duh" lol. Oh well. Here is what the issue was for me and how I fixed it.
cd ~/
ls -al
This should give you the files and folders in your user directory. (NOTE: I use AWS instances so most of the time my user will be bitnami unless I change it. Your user will be different.) What you want to look for are .bashrc or .profile or both. I updated both. Use whatever text editor you wish to open that/those files
nano .bashrc
and/or
nano .profile
Usually at the top of these files you will have something like
PATH=/opt/bitnami/apache/bin:/opt/bitnami/apache2/bin:/opt/bitnami/common/bin:
export PATH
The djangocms script is installed in the /home/bitnami/.local/bin folder. You will want to add this path to the PATH variable in your .bashrc and .profile files. (NOTE: If you don't use bitnami stacks your path will be slightly different. You can't just copy and paste from here) Now save these files.
Here is where my palm went to my forehead. I went back to my django projects directory and issued the command
djangocms -f -p . projectname
and received
djangocms: Command not found
I forgot that you have to reload this information into your session or log out and log back in for these changes to take effect. So either log out/reboot or if you don't want to log out you can issue the following command
source ~/.bashrc
After that everything should work fine. If not there were probably errors with your installation. Refer to the djangocms documentation regarding installation and python compatibility. Hope this helps someone.