For reference, I'm on Windows 11 using the Bash shell and have Python 3.9.2 installed.
I'm trying to create and activate a Python virtual environment using venv but when I activate it, nothing happens, but no error is given either. My understanding is that once I activate it, my prompt should change to reflect the environment I'm working in, and where python should show it in the virtual environment. Can anyone help clear this up for me?
Bash is unlike the normal command line interfaces on Windows. It uses the shell language, hence you'll not be able to activate it using the same procedure.
Since you generated the file from Windows,
to activate the virtual environment, run:
cd example_venv/Scripts
. activate
Take note of the space after the dot. It's very important for it to be included.
For those using Mac OS or Linux, you can just run:
source <path_to_venv>/bin/activate
where <path_to_venv> is the location of your virtual environment.
Related
I am just starting to learn django and I am facing the set-up phase. In particular I'd like to ask how to recognize if the virtual environment is activated or not. I know that I can use the command pip freeze but in all the tutorial that I am following, when the venv is activated, I can see the venv name in brackets in the terminal command line.
I can correctly activate the venv with the source command and check via the pip freeze command but I have no indication in the command line.
I am on a Mac/OS(M1) and using python3
thank you
To have visual information about the virtualenv on the command line you need to change the shell config to show it. It's not related to python or django itself.
It will depend on the shell that you are using, but assuming the default shell on mac you can check this question virtualenv name not show in zsh prompt
From venv docs.
When a virtual environment is active, the VIRTUAL_ENV environment variable is set to the path of the virtual environment. This can be used to check if one is running inside a virtual environment.
So you should be able to test it with:
import os
os.getenv('VIRTUAL_ENV') is not None
Yes, when the virtual environment is activated, it shows in the terminal as a prefix like
(env) yourname~Desktop/workspace-folder>
And that is enough to know it is activated, and you are using it.
Since you are using Python 3, you can create your virtual environment as follows in the same directory of your project, open terminal or iTerm and run this comman
python3 -m venv env
After few seconds, a folder env will be created that is your virtual environment. Note you can name your virtual environment as you wish, maybe like python3 -m venv djang-app
After you have created the virtual environment, you can now activate it like
source env/bin/activate
Again, if you created your virtual environment using lets say django-app
python3 -m venv django-app
You can activate it like this
source django-app/bin/activate
and you will see your terminal is prefixed as follows
(django-app) yourname~Desktop/workspace-folder>
To deactivate the virtual environment, you simply run this command deactivate in the terminal with active virtual environment.
You can learn more about python3 venv from here.
When using Pycharm, I make my virtual environment when I m creating a new project and then never have to think about activating it or anything. It works just fine.
When I m using the terminal on my Mac OS, I need to create the virtual environment and then also activate it.
I also have to activate it for VS Code.
How do I know when I need to activate my virtual environment? Thanks.
To activate a virtual environment from the terminal, you need to source a file that the venv module created. This file typically will be in the bin directory of your project (ej. my_project/folder/bin) and will be named activate.
So to activate the environment in your shell you would run the command
source my_project/folder/bin/activate
You should know if you're already IN the virtual environment, when you see the project's name parsed to some part of your shell prompt. If you're already into your virtual environment, you can leave it with the deactivate command.
I am running a Python 2.7 script that has specific dependencies/libraries (contained in a virtual environment) using anaconda prompt. Is there a way to run the script using code in a python 3 .py file in a different environment? Something like a library that allows me to open anaconda prompt in a specific environment (to then run the python 2.7 script). I couldn't seem to find it online. Any pointers would be appreciated.
Well you can select the environment from the drop-down box in the Anaconda Navigator home page if you have your virtual environment in Anaconda itself.
Or you can use
conda activate env-name
If you have your base conda in your terminal as default or else activate using
source ~/.bash_profile
then run
conda activate env-name
Hope this helps.
Once I try to run python on my conda environment it blcok like this and nothing change:
(python3) user todoapp
$ python
Knowing that python was intalled in my conda env using conda create -n python3 python=3 and I have runned my env using source activate python3. What suprising me is once I run ipythonthis work normally but python no :(.
I have searched in the net but nothing solved my issue. Is theire any option?
You're naming your virtual environment python3?? That's the same alias for actual Python 3 binary file in many operating systems, don't do that.
Create another virtual environment with another name (or clone that env to another name) and move your project files to it. Then remove your python3 env.
See https://docs.conda.io/projects/conda/en/latest/user-guide/tasks/manage-environments.html on the related commands and paths.
Whenever I run the commands which conda, which pip, and which python in the base environment, it works fine but whenever I activate the virtual environment using the conda activate command it doesn't recognize those and says no conda/pip in ....
Does anybody have a solution to this? Is this simply a path problem and I need to set a separate path for the virtual environment? Thank you.