On my Mac, I have 2 versions of Python running, one from Brew (3.9) and another one (3.8)
When I try to install some data science packages via pip3, they are installed but cannot be used as 3.9 takes over.
python3 --version
Python 3.9.10
which python3
/opt/homebrew/bin/python3
pip3 install pandas
Requirement already satisfied: pandas in /Library/Python/3.8/site-packages
python3
import pandas
ModuleNotFoundError: No module named 'pandas'
pandas is just one example of the many packages I see via pip3 freeze.
What are my options to point to installed versions at Python 3.8 ?
There are different ways to approach this:
One temporary option is to use alias like this:
alias python3=python3.8
You can use directly python3.8 in your terminal.
If you want to install the packages to python3.9 then you can also use pip3.9
You could use:
python3 -m pip install module
which will use pip to install to the python version you just used.
The recommended way is to use:
python3 -m pip install module
Related
I am unable to get dateutil installed in my Python code.
from dateutil import tz
ImportError: No module named dateutil
I had date-util installed (Python version is 3.7.3)
> pip3 install python-dateutil
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Requirement already satisfied: python-dateutil in /usr/lib/python3/dist-packages (2.7.3)
I cannot uninstall them (to reinstall). I get the following error
> sudo pip3 uninstall python-dateutil
Not uninstalling python-dateutil at /usr/lib/python3/dist-packages, outside environment /usr
Can't uninstall 'python-dateutil'. No files were found to uninstall.
Then, I used the following command to uninstall:
> sudo apt-get remove python3-dateutil #This worked
> pip3 install python-dateutil
This works, but asks me to install cycler, kiwisolver, pyparsing, which I install using pip3. But I still cant get the python code working - has the same error (ImportError: No module named dateutil)
Any suggestions on what's going on?
I found a solution - The python code is being called from a bash script. It worked fine until recently. Recently I installed some other packages that installed python 2.x. So, the python scripts were using Python 2.x rather than 3.x. I had symbolic links to python 3.x, but that didn't help.
Now, I am explicitly use python3 mycode.py to overcome this issue.
I highly recommend to use conda environment instead of pip. See, there are several modules which do not give expected behaviour in pip (like pytorch).
Get the package installed using:
conda install -c conda-forge python-dateutil
returning the question, to get the package running it requires fulfillment of it's dependencies. If you are using python 3.7.3 its obvious that it may lack in some of the features of modern python 3.11 as a result you get the obvious error. The python package python-dateutil must have been configured according to the modern python language version.
Iam using python 3.11.1 and the package gets installed very perfectly. You may install old version of package or upgrade your python language version or use Conda as mentioned before.
PLEASE ,how to import harfang in ubunto for python3 ,?? it doesn't install for me !!
i tryed pip install harfang and doesn't work
Solution
The solution is to simply use
pip3 install harfang
or
python3 -m pip install harfang
If it throws error regarding pip not being installed, you can install python3-pip using apt.
Explanation
Why you were unable to install with pip directly and instead had to use pip3 is because, in ubuntu, the default python version is python 2.x. The current python versions actively maintained and supported is 3.x where x means some minor version.
Due to this reason, after you install a python 3.x installation, you need to specify if it's python3 or python2, where python is a default alias for python2.
I also mentioned about python3 -m pip install harfang. This also works, as python3 -m pip means trying to run a python module using specific python installation (which in our case is python3), you can specify which module to call using -m. You can do it with any other installed python module which has a CLI interface as well.
I tried to install PyMuPDF on Python 3.9 when first I installed by pip install PymuPDF and re-checked by pip list like this"
But when I imported PyMuPDF:
ModuleNotFoundError: No module named 'PyMuPDF'
Next, I tried to install PymuPDF from doc, it said I need install MuPDF first, and install with Wheel, I tried both:
pip install C:\Users\Admin\Desktop/PyMuPDF-1.19.6-cp310-cp310-win_amd64.whl and pip install PyMuPDF-1.19.6-cp310-cp310-win_amd64.whl but reviced error:
yMuPDF-1.19.6-cp310-cp310-win_amd64.whl is not a supported wheel on this platform.
What should i do to install PyMuPDF, thank you all.
PyMuPDF is available with a wheel under all Windows versions - you should have no problem at all.
But please follow this procedure:
Make sure your pip is the current one. This ensures that any changes in supported platform tags are known to pip.
Then install PyMuPDF.
So overall
py -3.10 -m pip install -U pip
py -3.10 -m pip install -U pymupdf
This should simply work!
In your script however you must do import fitz - this is the top-level name of the package.
I am trying to install xlrd to read Excel files in python.
I have tried this: pip install -U pip setuptools. My macOS Mojave 10.4.3 has Python 2.7 which is where the default install goes to. But I have also installed Python3.7. How do I get pip install to my 3.7 directory?
I am on Mac machine(Catalina -version 10.15.5) and below pip3 command worked for me.
pip3 install xlrd
python version : 3.7.6
OS : Mac-Catalina(10.15.5)
Thanks to #Tapan Hegde, pip3 install xlrd worked from me, after installing the pip3, like this:
sudo apt update
apt install python3-pip
pip3 install xlrd
I reckon the easiest/cleanest solution would be to use a tool that isolates your python environment, such as virtualenv
Once installed, create a virtual env by specifying which version of python you want to use:
$> virtualenv -p python3 env
Note: puttin python3 directly works only for mac, with linux, you must specify the absolute path or your python binary.
And then 'activate' your environment:
$> source env/bin/activate
From here, any python or pip command you use will use python3.
$> pip install xlrd
Virtualenv has the advantage of not 'polluting' your local python installation, your can manage your pip modules installed more easily.
If you want more detail on how it works and the other alternatives, check this post
When pip install xlrd not work and in computer is still old version, then try do it with current version, for example pip install xlrd==2.0.1.
The current versions are here
I'm trying to install packages for my python 3.5.0 versus my python 3.4.3
I can run both by typing either python3.4 or python3.5
I have pip2 and pip3. I also ran the script sudo easy_install3 pip, which made me be able to use pip3.4 But I am still having trouble installing modules for python3.5. pip3 just installs for python3.4
I am looking to install termcolor for python3.5 and I am having no success. Can anyone help?
I am on Windows, and you appear not to be, but maybe the following will help.
If pip is in your system's equivalent of python35/Lib/site-packages, then python3.5 -m pip should run pip so that it installs into the 3.5 site-packages.
If you do not have pip in the 3.5 site-packages, copy its directory, along with its dependencies (pip....dist-info/, setuptools/, setuptools....dist-info/, and easyinstall.py) from the 3.4 site_packages.
Or, if pip3 or even pip3.4 is in python35/Scripts, run it with its full path name so you are not running the 3.4 version.