(Beginner) I am working with a virtualenv for a django project using my Macos terminal and Visual Studio Code.
Recently, my terminal disappeared where I was running all of my code and I do not know how to reenter my virtualenv or my project that I still have on Visual Studio Code. I have tried everything including:
source virtualenv/bin/activate
Or,
virtualenv/source/activate
Or,
cd my_project_name
and then trying to enter my virtualenv following this step (^) with the commands above.
Nothing is working and when I run "python manage.py runserver" it says there is no such file or directory. I am struggling and do not know how to continue my current project on django before getting back to my project and virtualenv.
Any help is greatly appreciated!
Visual studio code actually has a convenient way of keeping track of virtual environments. At the very bottom in the blue footer bar, click next to the refresh icon, and you should see whether it's available.
If it's really gone, don't sweat it. Virtual environments are completely expendable – it'll turn up. For now, just make another, and be sure you create it in your project's root directory this time.
You actually usually don't need to activate a venv with vscode. Just cd into the project root directory and open vscode with code .. The activated envionment will appear in that same spot in the footer.
Also, look into using a requirements.txt file, it'll save a lot of time if you keep misplacing the virtualenv.
And finally, it's best not to name your venv "virtualenv", name it something unique – otherwise it's guaranteed to confuse!
Related
I am fairly new to creating Python applications. I have fooling around with some small tutorials and applications using PyCharm and have always created a new project using the Virtualenv environment, ending up with a "venv" folder under my project folder. I have not had any problems with this, but then again I have not done any large projects.
However, I have been wanting to learn Flask want to try to create a new Flask project the proper way. I see in many tutorials that people are creating (and activating) the virtual environment from the (Windows/Linux) Command Line instead even though they are using PyCharm and I was just wondering what the difference is?
When I work on a project in PyCharm, created with Virtualenv, I do not activate the venv before working on it. Is this wrong or is this something that is handled by PyCharm? What if the venv is created from a Command Line? Is it still handled (activated) by PyCharm if working on the project there. And what about the folder structure? Is this affected by how the virtual environment is created? Is there somewhere I can find some "best practices" for the setup / folder structure when creating Flask project within a Virtual Environment?
PyCharm activates the VirtualEnv for you if it is configured to use one and told where it is (more specifically, where the respective Python binary in the VirtualEnv is).
There's no real difference between manually created VirtualEnvs and ones created by PyCharm. (Apart from the framework you select to create one in case this is different from what PyCharm is configured with.)
If you want, you can just create one manually and then point PyCharm to it. Either during creation of the project or later using the Settings dialog (see Settings -> Project -> Project Interpreter). It will then treat it no differently and also activate it for you when working inside the IDE.
A virtual environment is pretty much just a folder which stores installed Python packages and isolates them from the rest of your system. This is so you can work on different projects which may all have competing requirements for external packages, without getting into conflicts. "Activating" a virtual environment just sets certain environment variables in your current shell so it'll use packages from this environment. "Activating" an environment never has any impact beyond your current shell. So activating an environment on the command line won't do anything to PyCharm.
PyCharm integrates a Python interpreter to give you lots of extra functionality. You tell PyCharm which interpreter you want to use for your project and it'll figure out what packages it has available, what version it is, and automatically set everything up properly for running your code from PyCharm etc. You can tell PyCharm to use your system's Python interpreter or an existing virtual environment or even use it to create a new environment. You don't need to do anything special beyond just selecting the right interpreter/environment in the project settings.
There's no reason to activate the environment from the command line if you're not going to use it from the command line. Of course, using Flask and running its server from the command line and keeping it running in the background may be useful. Not sure if PyCharm would give you an easy or integrated option to have persistent processes run in the background. You could still select the same virtual environment in PyCharm and use it to run your tests in it directly from PyCharm, use its debugger etc.
I prefer to keep the venv out of the project folder and store all venvs in ~/.virtualenvs/ or such. It declutters the project folder and prevents accidentally checking those files into the version control system.
I was just wondering what the difference is?
There's many tools for creating and using virtual environments and there's no difference between them, the only difference between them is their commands syntax (or the way it interact with users, e.g. for Pycharm you set some settings via GUI).
Is this wrong or is this something that is handled by PyCharm?
There's nothing wrong with it. As long as you have a venv (or .venv) directory in the root of your project and it is executable for any user, Pycharm will use it and it activates this virtual environment for you (without telling you). If Pycharm was not able to do that, (because of trouble in finding venv or activating/executing it!) then it will show you messages to fix its problems and it can't run your project till you fix them.
It's better to create your virtual environment in .venv directory right into the root directory of your project. (It's kind of conventional)
See python virtual environments and configuring pycharm virtualenv as well.
Please Everybody. I have a little problem with pipenv.
For instance, I am work on a Django project and I decided to sleep. I had to shutdown my laptop for some reason. Then i woke up navigated to the project and I open it in VScode again. My question is how to I reactivate the pipenv environment again.
I mean something like source bin/activate if you are using virtualenv
I use pipenv shell but i want to be sure that is absolutely right.
pipenv —venv to get the location of the virtualenv
Then activate it like a normal virtualenv.
As a new user of both Django and Pipenv I recently ran into the same issue. Maybe this will help someone.
(for Mac m1 steps maybe different for you)
expose hidden folders inside the home directory. Shift + command + >
you should see a folder called " .local." follow it through...
.local > share, virtualenvs. The virtualenvs is what your looking for. It contains folders for all of pipenvs.
from the integrated terminal inside vscode I cd into whichever pipenv folder coorespondes to the project I'm working on then run:
source bin/activate.
the terminal should return with an indicator in parens ahead of user name confirming the shell is active again:
(Blog) user#user-MBP Blog %
cd back into project folder (the one containing manage.py) and run python manage.py runserver
should be good to go.
pipenv --venv => outputs the virtual environment directory (ie "/Users/td/.local/share/virtualenvs/data-infra-HlhPgy0O")
You can copy the output of the previous command and then run (on zsh):
source [vitrual_environment_directory]/bin/activate
(ie source /Users/td/.local/share/virtualenvs/data-infra-HlhPgy0O/bin/activate)
I’m starting to learn Python using PyCharm IDE on windows. I have a specific question about where to start adding/ creating python files/ classes.
I installed Python 3.5 and installed PyCharm Community. Created a project first and then created a virtualenv. I can therefore switch between 'Python Interpreters'. But, when I open PyCharm project, I see a folder structure and I can’t make a decision where to start creating code files. I've added screenshot as reference.
Where to start adding creating code file packages? And, is this the right way of creating virtualenv?
I'd also appreciate if you could please suggest any related best practices, especially regarding using virtualenv in this scenario.
Create the virtualenv while creating the project. Click the gear icon to the right of the interpreter box at the new project dialog box. Choose "Create VirtuanEnv"
Then you can right click the project name and add a python file.
Typically when developing python code on windows using PyCharm, I create a subfolder in my User directory (C:/Users/Vasili/virtualenvs/), where I place all of my future virtual environments.
When creating a new project, I create a new virtualenv in that folder and set it as the interpreter for the project. PyCharm will use that venv every time you open that project. It will also activate it whenever you use the inline terminal within PyCharm so you can run executables such as nosetests, if you have it installed in the project virtualenv.
As for general project structure, python is fairly informal when it comes to this, but there are some standards that you could try to adhere to, such as:
creating a setup.py file with your project metadata and other data to allow uploading the project to pypi, or even building RPMS.
a requirements.txt file with packages that pip must install for the project to work
A tests folder with your unit tests, fixtures and so on
The actual package itself, named after your project, with a dunder init script (__init__.py) inside, to signify that it is a package
An open source license
A readme, or documentation that can generate HTML docs with sphinx
Anything else you think would help people use your software.
As you are using community edition, you will have some limitations of the features.
I would suggest you to create virtual env from terminal/command prompt.
This is the folder structure which I follow for development while using Pycharm:
C:\workspace\<virtual_env>
C:\workspace\<project_name>
Add the whole workspace folder to your Pycharm as project.
In order to create and activate virtual env in windows refer the following:
https://docs.djangoproject.com/en/1.10/howto/windows/
I sincerely apologize for the noobish dribble thats about to come out here:
Okay so I am following along with a youtube tutorial using terminal/django/komodo edit to make a simple website. This is my first time really using terminal, I am having issues. I have read up on the terminal and searched this site for my question but to no avail. Im hoping someone will take the time to answer this for me as it is most infuriating. This is my first time working with virtual env's as well.
So my question is, How do I uhmm, I suppose "save" my virtual env settings?
So I have set up a new virualenv. Downloaded django and started up my server so I can see things such as the admin page, log in page, from the internet page. Things go as they should along with the tutorial until it comes time to eventually turn off my computer.
When I reload the virtualenv I cannot run the server, it gives me: Import error, no module named django.core.management.
I use pip freeze and it shows that django is no longer installed.
If trying to reinstall django it gives a long block of error messages.
All the work done within the virtualenv file is still visible for the komodo edit pages however, but it seems the terminal does not want to work properly. My only option thus far has been to completely remake a virualenv, re-set it all up with the proper imports, files, django and restart the project.
so my questions are:
how do I save my terminal and/or virtualenv settings?
What do I need to do before logging off to ensure I will be able to continue with my project?
Lets say I am going to continue with my project, How do I start up the project again via terminal? Is that where I am going wrong? I've assumed up until now that I must go into terminal, start the server again and then from komodo edit continue with my project, but inside the terminal everything goes wrong.
Im not even explicitly saying I cannot continue with my project, I am more saying the terminal is not recognizing I had django installed within my virtualenv, and it is not letting me start the server again.
I have tried doing the research on my own, I am not one to sit back and wait for an answer but being completely new, this is baffling. I am sorry for the noob questions, feel free to link another answered question or website that has the answer.
Thank you all!!
Let's start from the beginning:
You are in your project folder eg /home/me/myproject
You create a new virtualenv, eg virtualenv /home/me/virtualenvs/myprojectenv
You activate the new virtualenv:
source /home/me/virtualenvs/myprojectenv/bin/activate
...this means that python and pip commands now point to the versions installed in your virtualenv
You install your project dependencies pip install django
You can ./manage.py runserver successfully
Now, the virtualenv has only been activated in your current terminal session. If you cd outside your project directory the virtualenv is still active. But if you open a new terminal window (or turn off the computer and come back later) the virtualenv is not activated.
If the virtualenv is not activated then the python and pip commands point to the system-installed copies (if they exist) and Django has not been installed there.
All you need to do when you open a new terminal is step 3. above:
source /home/me/virtualenvs/myprojectenv/bin/activate
Possibly the tutorial you followed got you to install virtualenvwrapper which is an additional convenience layer around the virtualenv commands above. In that case the steps would look like this:
You are in your project folder eg /home/me/myproject
You create a new virtualenv, eg mkvirtualenv myprojectenv
...virtualenv has already been activated for you now!
You install your project dependencies pip install django
You can ./manage.py runserver successfully
and whenever you start a new shell session you need to:
workon myprojectenv
in order to re-activate the virtualenv
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Does anybody have directions for getting Eclipse (Galileo), PyDev, and Virtualenv working together? I'm specifically trying to run Pinax but any instructions are fine.
I thought I had it (and even blogged everything but the final step - interactive debugging) and still there is no solution. I'm specifically on OS X but any answer should be sufficient. This is the best resource I've found so far:
http://blog.vlku.com/index.php/2009/06/10/djangoeclipse-with-code-complete-screencast/
I'd disagree with having to go through all the hassle of creating and maintaining a separate workspace for every virtual environment.
All you need to do is set up a separate interpreter per virtualenv and make sure the project is using it.
Along with your standard interpreters such as Python 2.5, Python 2.6, Python 3.1 you'll also add some more along the lines My Django Website, My Cool Project, My Other Cool Project--where each interpreter will have all the PYTHONPATH entries as it's virtualenv would provide.
What problems are you having?
The key is having separate workspaces for each project. Then select the python interpreter for that workspace to the one created for the virtualenv. Then you should be set.
My instructions for creating a Django Virtual Environment which works with Eclipse are as follows;
Note: The instructions are for OSX Mountain Lion, but should work with other operating systems. I have collated this information from various sources and would appreciate any suggestions or comments. I will assume you have python, virtualenv and eclipse set up on your system.
Open a terminal, move to the location you would like to have your eclipse workspace and;
mkdir projectenv
cd project env
virtualenv venv --distribute
source venv/bin/activate
Now, lets install the dependencies;
pip install Django psycopg2 dj-database-url (Your needs may vary from mine)
Now we will start the Django project and commit to git;
django-admin.py startproject myproject
pip freeze > requirements.txt
git init; git add; git commit -m myproject (Please have a .gitignore file with venv and *pyc in it before doing this step)
Our django project is set up and ready to go, so now open eclipse and at the workspace selector, click browse and select the projectenv folder (i.e. the folder which contains the venv folder, the myproject folder and the requirements.txt folder) and click open.
Go to File, Import, General, Existing Folder as New Project and select the myproject folder, click finish. Your project will now appear in the package explorer - you should now switch to the PyDev perspective if not already on it.
Right click on the main myproject folder in the package explorer, go down to PyDev and select 'Set as PyDev project'. Eclipse will now prompt you to set up the interpreter and will take you to the preferences window. Click New, and select the interpreter in /venv/bin/ select python, not python2.7 and click ok.
You will get a list of libs, leave them as they are and click finish, you will get a warning, but click proceed anyway.
Now, click on New Folder in the bottom half of the prefs window and select /venv/lib/, click ok, then click apply, then click ok.
Finally, right click on manage.py and Run As, Run Configurations. In the Arguments tab, type;
runserver --noreload
then click Apply and then Close.
That should be that, when you want to add an app, do so on the command line as you normally would using manage.py startapp myapp (if you install the Aptana Studio plugin, you can get a terminal window inside eclipse), right click the main project folder in eclipse and hit refresh, everything will be there. When you want to debug, set your breakpoints, hit Debug As python manage.py (the config you set up earlier) and when you hit a code breakpoint, Eclipse fires you into the debug perspective.
I find this gives me the perfect mix, it means I can write a lot of stuff on the command line as normal, but because it's set up in Eclipse, when things aren't going my way, I can fire up eclipse and do some real debugging!
I hope this helps.
Not sure about Galileo since I have upgraded to Helios.
It's easy to setup Project->PyDev - Interpreter/Grammar -> Interpreter based on different projects. When configure the interpreter to point to virtualenv's python interpreter, Pydev doesn't automatically inherit the system python's path, therefore it's the user's duty to select appropriate PYTHONPATH. But you can always go back to edit that in Preferences->Pydev->Interperter - Python -> Libraries tab.
Based on the information here (and others found when I was trying to solve the same problem you had), I put together a post with step-by-step instructions here.
The short answer, as the Doctor says, is to make each virtualenv correspond to a workspace - so when you create a new one of the former, you create a new one of the latter exclusively to use with it.