I am fairly new to using virtual environments for python projects but I have spent many hours trying to resolve this issue I've been having through various posts on this site and on others and have come up short. I have even resorted to uninstalling all python distributions and reinstalling with no luck.
I have the anaconda distribution of python installed on Windows 10. I have the problem that after I create a virtual environment, called venv, in a project folder I am unable to then activate this virtual environment using the anaconda prompt to install packages through pip. What I have done so far is as follows:
(base) C:\Users\[User]\Documents\GitHub\[project_folder]> virtualenv venv
This then successfully creates a virtual environment folder in my project folder called venv. Working in this directory I navigate to:
(base) venv> cd Scripts
(base) venv\Scripts> activate
There are a number of activate files to choose from and neither turns the environment from base to env as expected.
The reason I am using anaconda prompt as opposed to the standard command prompt or Windows PowerShell is because when I'm using the pip install <package> anywhere but in the anaconda prompt I get an error message that reads:
WARNING: pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
I'm not sure what this means and have tried to do some googling to solve this issue but to no avail. Note I do not have this issue when working on python projects on my MacBook and I can easily enter virtual environments and install the packages there with no issues. I'm relatively new to Windows so perhaps I'm missing something here...?
An interesting observation is that I can enter any virtual environment I've created through Windows PowerShell but I encounter the pip problem described above when trying to install packages into this environment.
I'm desperate for some help resolving this issue as it's greatly hindering the work on all my projects, and unfortunately I cannot just use my MacBook to code either.
use those command for python virtualenv
For activate
WINDOWS: activate nameofvenv
LINUX, macOS: source activate nameofvenv
For deactivate
WINDOWS: deactivate
macOS, LINUX: source deactivate
Related
From the start of using pycharm i am facing problems with working with libraries
I tried reinstalling python, pip, pycharm; adding and readding to path. I also tried using pipenv instead of virtenv.. and it worked once, but.. now again-
i use $pip install numpy |as example| in cmd window it says to be successfully installed. Go to pycharm, type 'import numpy'.. and nothing happens. I know i can download manually: go to settings and so on.. but it would be much beter if pip installed with cmd would be instantly displayed in Pycharm. Anybody, please, help.
Check if you have activated the virtual environment in which you have installed the packages. For instance you may have installed the package on Global python version and running your program on a virtual environment which will not work. So maybe try activating your virtual environment before installing the Packages.
Step 1:-
activate {name_of_pipenv}
pip install numpy
i'm having a weird problem...
I can install packages using the built-in package manager in pycharm. But for some reason everytime i use "pip install (xx)" it is installing the packages in a conda env somewhere on my mac...
How can i solve this ?
I've tried the following:
close --> reopen pycharm //
deactivate and activate the venv //
Checked project intepreter is the right one (which it is...)
You're inside the virtual environment venv, while being inside the Conda base environment (note the (venv) and (base) to the left of your prompt). Conda is likely overriding your venv's pip.
My bet as to why this is happening is that, during installation, you set Conda to autostart its base environment whenever a new terminal is open (be it inside PyCharm or not).
You can try to either:
exit Conda (with conda deactivate) and try pip install again (check to see that you're still inside the venv virtual environment).
install the packages directly from PyCharm's GUI - note the small + sign on the bottom-left of the package list. This won't solve the issue related to your terminal, but will function as a workaround for now.
Note that these aren't guaranteed to work, because you may have additional configurations on your system (either installed directly by you, or indirectly by Conda when you installed it).
I apologize in advance for my poor vocabulary - I do not know much about environments, paths, and things of the sort. I am on macOS Catalina.
I created a program using Spyder from Anaconda. My program uses packages like pandas and numpy which are built into Anaconda. I used to be able to run the program in Terminal with the command: $ python3 app.py.
However, I recently downloaded Python 3.9.1 from https://www.python.org/downloads/mac-osx/. Ever since then, I have been unable to run the program in Terminal because of missing package errors like
import numpy as np
ModuleNotFoundError: No module named 'numpy'
I went to my applications folder, right clicked on Python 3.9.1, and clicked Move To Trash. This did not solve my problem. I reinstalled Anaconda (I did not uninstall it - just simply installed again), but that also did not solve my problem. I am able to run the program in Spyder (from Anaconda), but I wish to run it in Terminal again.
I believe the solution is simple, but I am not sure what to do. I have tried searching and reading but I am not familiar with the terminology. I think I just need to reset the environment, but I am not sure.
Anaconda is used for creating closed enviorments, so you don't need to thrash your computer with global packages.
Imagine you have 2 different projects. Project A works only on python 3.2 and Project B works on 3.8.
That's where anaconda comes in.Managing enviorments with conda
conda create -n PROJECTA python=3.2
conda create -n PROJECTB python=3.8
Now activate env you wish to work with. For macOS
source activate PROJECTA
Now you should see (PROJECTA) instead of (base)
Now inside this PROJECTA you can install modules you require like
pip install numpy
and when executing .py file
move to dir with your app.py file and
python3 app.py
this will be opened in conda enviorment you created and activated, using modules you installed in this env.
You can still edit py file and execute it through shell, but it will throw errors if you try to run it from IDE without linking project to respected conda enviorment.
If you are using PyCharm Configure a Conda vir env in PyCharm
You must create separate environments for every projects or it will get messed up.
conda create -n name_of_environment python=3.6
You must not delete the python folder into trash rather uninstall it Python 3.9.1 and remove its path from the directory.
In short if you run python from terminal and it is not supporting your Installed anaconda packages . You should use anaconda prompt instead of CMD.
Because your anaconda is not added to path rather then it picks up the python 3.9 you have installed from Python 3.9.1 from https://www.python.org/downloads/mac-osx/. ( This is the python with separate environment then anaconda so it wont detect anaconda packages ).
When you run the cmd and enter python it runs the python that you downloaded and installed rather then Anaconda
At the time of installing anaconda it gives option to add conda variables to path you can select those at installing stage / or add manually
I was wondering How can I stop python from installing modules in specific virtual environment and install them globally;or probably virtaulenv won't let me do that!?
if you have (venv) before you terminal input, your virtual environment is activates. so you can using deactivate command for deactivating. in addition if you have a (base) you should be closing your anaconda base environment so you can see this answer
You simply install the package without activating your virtual environment. Once you install your package that way, it would be installed globally instead of inside a global environment.
Also, to confirm this, you can activate your virtual environment and run the command pip list , this will show all the packages in that virtual environment, and also try deactivating the virtual environment and run the command pip list, this would show all packages in the system.
I hope this answers your question
I believe I've found some sort of solution ,by just typing "pip install -target C:\Users\YOURNAME\AppData\Roaming\Python\Python37\site-packages"
it's kind of a lame solution but I think it's better than nothing!
By the way there was no pip.exe in my python folder!!!
I am trying to create a new python 3.7 virtual environment on my local computer running Windows 8. I have python versions 3.6, 3.7, and 3.8 installed. Their exe's are named python36, python37, and python, respectively. All three are correctly added to PATH because I can enter each interpreter.
Within my new project's directory I tried to create a virtual environment with python37 -m venv env. It produced an error: Error: [WinError 2] The system cannot find the file specified, but it still created the directory. However the Scripts subfolder is empty except for pythonw.exe.
In this question someone suggests doing python37 -m venv env --without-pip. When I tried this, the activation/deactivation scripts were created, but the virtual environment is using python 3.8.
It is my understanding that venv will create the virtual environment with what ever python exe you use to call it, so I don't understand how this can happen. I've verified that python37 points to the correct place with where python37, and can even enter the 3.7 interactive interpreter.
The problem was that I renamed the python exe's. I don't know exactly what goes wrong, but presumably at some point venv tries to find python.exe and is thrown off by the name.
Changing them back to python.exe and differentiating between the versions with their location fixed the problem.
Edit:
Check out Eryk's comments for more details.
First create folder at any drive then go to that folder and install virtualenv package using pip.
pip install virtualenv
Then create your virtual environment.
mkvirtualenv myvirtualenv
Then use below command to activate virtualenv in windows.
myvirtualenv\Scripts\activate
After this you can install related package in current virtual environment.
The Python Standard Library for Creating Virtual Environment