I have a virtualenv called env on my directory...After activating:
source env/bin/activate
I see that it is activated...(env)
I have installed some libraries on the virtual env, and i can see that they ares installed on their folders, but calling...
pip list
The libraries that Appears on the list are not the libraries installed on the env.
Also calling a python file to execute, dontn run.
Therefore calling for checking the python version, don't match with the env python version.
I have tried to reinstall python and pip, but nothing happens
I work on a 2 macOS machines and I use iCloud for sharing my projects. I created the env on one macOS machine but the same env didn't work on the other macOS machine. That was the problem.
I created a requirements.txt on the first macOS machine, then I created a new env on the other macOS machine, loaded the requirements.txt, and it now works.
Related
Background:
In WSL2 (ubuntu 20.04) I created a python virtual environment inside a directory. Using the command python3 -m venv venv my system's python version was set to python3.11 (after downloading) via sudo update-alternatives --config python3 and then choosing the version. I noticed I was having some errors of missing modules when I started WSL2 (happening after a computer restart), I read this was because I was using a different python version than the one ubuntu 20.04 came with so I switched back to 3.8 via the config menu as before. I am also using VS code that's connected to my WSL2.
These are some of the contents of my venv directory: venv/bin/python venv/bin/python3 venv/bin/python3.11 venv/bin/pip venv/bin/pip3
Question:
After activating my virutal env via source venv/bin/activate, when I do python3 --version I still get a version of 3.8.10 despite creating the virtual environment with 3.11. I was able to get the interpretor set to 3.11 on VS code.I know I was in the virtual environment since my command prompt had (venv) in front. I went into the python console while in the virtual env and did import sys and sys.path this was my output ['', '/usr/lib/python38.zip', '/usr/lib/python3.8', '/usr/lib/python3.8/lib-dynload']. Why isn't the python version changing, am I misunderstanding something or did I not do something correctly? Seems like pip isn't working either but works when I switch my system python to 3.11 (I tried installing it on 3.8 but it said it was already installed).
Solved:
Answered below, just re-created the virtual env while making sure my system python version was 3.11 (may have been some mixup earlier).
By changing the selection in sudo update-alternatives --config python3 you change the selected python version also for the chosen vitrual environment (at least when using venv, it might be different with other tools).
That can cause issues, because when creating a new virtual environment envname using venv from a specific python version xx.xx, a directory named pythonxx.xx is created in /envname/lib/, and inside it a directory named site-packages that contains the packages installed by the pip of this specific environment.
So changing back to the original python version of the environment through sudo update-alternatives --config python3 should solve the issue, and probably the errors of missing modules are due to the incompatibility of the current selected python version with the original version which you installed the virtual environment from.
Personally, to avoid confusing, I name my virtual environments with the python version as a suffix, e.g envname_py3.11.1. But there might be a better method which I am not aware of.
I deleted my venv directory and recreated my virtual environment while on python3.11. This has resolved my issue.
I am using Macbook M1 and I have installed Python using Miniforge/Conda. So virtual environment has been created, Python has been succesfully installed as well as pandas, numpy and other modules. I run some simple script with import pandas. After that I have installed TDSR, it is a screen editor for blind users, suitable for Mac Terminal.
https://github.com/tspivey/tdsr
I've cloned the repository of TDSR, then run some pip3 installation, as written in the readme of TDSR.
Every step I've done in the virtual conda environment in my home directory. But after pip3 install command the virtual environment disappeared and the Python script I've previously run cannot find pandas module. Is there any way everything can be restored?
Thanks
Jan
I've been using Python 2.7.10 in a virtualenv environment for a couple of months.
Yesterday, activating the environment went fine, but today suddently I get this cryptic error when trying to start Python from Terminal:
Illegal instruction: 4
I have made no changes to my environment (AFAIK), so I'm having a difficult time trying to come to terms with what this error is and what caused it.
Python works fine outside of this virtualenv environment. When running via /usr/local/bin it presents no problem.
I've had this problem a number of times now. While I can't say for certain what the actual issue is, I believe it basically means that some file(s) in the virtualenv installment of Python have become corrupted.
I keep my virtual environment in a synced Dropbox folder, so that may be a large contributor to the issue.
Restoring the virtual environment from a back-up archive worked for me. Or simply reinstall an identical virtual environment.
First, try activating the faulty environment by cd <path/to/old_env> and source /bin/activate.
If it's successfully activated, cd to an accessible location on the drive and run pip freeze > requirements.txt to export a list of currently installed Python modules.
Delete the old environment.
Install a new virtual environment of the latest version of Python 2 that you have on the computer, via virtualenv <path/new_env>
Or, if you want to use a specific Python version, first make sure you have you have it on your drive, and then do virtualenv -p <path>. Assuming that you have downloaded the Python version with Homebrew, e.g.: virtualenv -p /usr/local/bin/python2.6 <path/new_env>
Activate the virtual environment via cd <path/new_env> and then do source /bin/activate.
Assuming that you kept a list of modules to reinstall by previously doing pip freeze > requirements.txt, cd to the folder where the text file is located and do pip install -r requirements.txt.
Otherwise, reinstall the modules with pip manually.
I had same problem and found solution by uninstalling psycopg2 and installing older version. As I understood my comp was not supporting some commands in new version
I have installed Python 2.7, pip and virtualenv on my computer and I have created a virtual environment with this same version of Python. I installed some packages in this new virtual environment too.
Later, I decided to install Python 3.6 on the same computer to create a virtual environment that works with version 3.6. I downloaded Python 3.6 and installed it by selecting Add Python 3.6 to PATH and Install for All users and I selected the option to automatically install pip. As I had previously installed virtualenv, I have not had to reinstall it. Should I?
The problem is that, once installed, when creating a virtual environment I've got an error.
As I already had a version of Python installed I have specified that I want to use Python 3.6 in the virtual environment that I am creating:
virtualenv env2_py36 -p c: \ Python36 \ python.exe
The error already says that this usually happens when you install more than one version of Python on the same computer and warns that it is necessary to check the option Install for All Users to work (as I did) and also recommends placing the appropiate PythonXX.dll file in the Scripts folder of the virtual environment. However, I see that there is already a python36.dll file there.
Could anybody tell me what should I do to fix this problem?
On the other hand, I had previously created another virtual environment using Python 2.7. I use PyScripter to run my scripts but I don't know how to connect PyScripter to my virtual environment. It's still connected to the Python2.7's system installation.
This works for me:
virtualenv --python=python3.6 yourenvname
(3.6 is the current latest version of Python, but you can use whichever version you'd like.)
I have a virtual environment I have created on an Ubuntu virtal machine I am hosting on a windows PC. I intend to replicate my virtual machine in my virtal environment on the virtual machine. However, when trying to install modules to the VE I get a messgae saying that they are already installed - they're not installed in the VE but are on the VM. I thought when set active the VE would have no context of the VM which hosts it?
I have downloaded virtualenvironment sudo pip install virtualenv and then created a virtual environment sudo virtualenv virtual_environment. I then set the virtual environment to active source virtual_environment/bin/activate
When I try and do an apt-get install I get the message 0 upgraded, 0 newly installed, 0 to remove and 202 not upgraded despite the fact I have no modules whatsoever on the VE.
What am I doing wrong?
Thanks!
I think you're getting a bit confused about what virtualenv does. It is only for isolating Python files and libraries (those you install with pip install). It does nothing for your operating system files (those you install with apt-get).
If you want to create a re-usable container of operating system files (with apt-get) then look instead at something like Docker.