The answer to this question could be "You're as dumb as a wooden bowl" but I have searched a lot and haven't found a solution without installing python on other computers.
I have a python/flask web app that I need to distribute to many users. However, I can't install python on all those computers and there is no computer which everyone can access. And I cant serve the app internally from a server either. Yes, that's what I'm dealing with.
I have saved the git repo it in a network drive that everyone can access. I hoped I could run a batch file to spin the localhost server from a copied environment for the user and then use the web app.
I copied a conda environment over to the network drive and tried to use that but that gave me a Importing the numpy c-extensions failed error.
I tried including a pip environment (.\env) in the folder. So I thought any user could just activate the environment using the batch file ...
cd %cd%
.\env\Scripts\activate.bat
.\env\Scripts\python.exe run.py
but it's not working.
The .\env\Scripts\activate just crashes. I amended the activate.bat set "VIRTUAL_ENV=%cd%\env" to ensure it uses the current folder. Still crashes.
If I exclude that then .\env\Scripts\python.exe run.py still looks for a python installation at the path I have on my machine rather than the path I provided above.
Is there a solution to this?
All the computers will be using Windows but may vary between Windows 7 and Windows 10. I'm doing the development from my Windows 10 computer.
After activating venv My below code worked:
(Monday) C:\Users\Resurctova\Desktop\PoraPuski\Monday>python new.py
Output :
testing
since the new.py has code to print testing
As Monday is my venv I activated it and executed the script.
Do not execute in Scripts folder of your venv environment
Have you though about creating an exec file and that will save all your folders. Using a tool lik PyInstaller. You just need to share the output exe file without installing python.
Related
I have a Ubuntu server with restricted access. There I will be hosting my application.
I trying to run Python scripts which were working with the default packages provided by the server. I want to work with numpy and other modules.
As I cannot install or download or do anything, I created a python server in my local machine (WINDOWS) using WSL to emulate the Linux file system and copied the python environment files to the application directory and deployed in cloud.
The problem is no matter in whatever way I try I cannot import numpy (or any module which I copied). I moved all the site-packages to the location of my Python script (As the current script's path will be there in the system path) and tried to import but no luck.
Please help me with crack this in any possible or impossible way.
I am trying to achieve this for the past 6 days and cannot do it.
Please, I have to achieve this at any cost. I have attached my latest structure.
Thank you in advance.
My Folder structure screenshot:
EDIT:
Ok. Let me get this straight. I have a Linux server (Ubuntu 18.04) where I am hosting an application. From that application, I am calling python scripts for some machine learning purposes. It is restricted server and I cannot access it. The only way that I found out the Linux distro version is through Java code by calling some terminal commands using "ProcessBuilder". As the server is highly restricted I cannot run any of the Linux commands like echo, set, export, sudo, wget/curl,...etc., Since, python3 is already provided by Linux (by default) I am using that python3 command to call my python scripts (from Java code using "ProcessBuilder") and execute them.
If it is a normal script (if I am using python standard libraries) it is working fine. In one of the scripts I am using "numpy". So, I want to import that module. I am doing the development in a windows environment. So, to emulate the Linux file system for importing packages I created a virtual environment in WSL with same Ubuntu version and installed numpy and then replaced all the symlinks inside those packages with the required files. Then I copied the entire environment and pasted in my resources directory (which is in windows environment) and deployed. No luck.
So, I made a zip file for only "site-packages" folder inside that environment. Then I copied the zip file and pasted in my resources folder and deployed. No luck. The error that I always see is "numpy.core._multiarray_umath". All the articles and in GitHub also tell us to re-install the package. But, I cannot install. I don't have any such access.
How can I import numpy without installation? If there is any work around to achieve this please explain, I will do it. Even if it is harder, complex and time-consuming I am okay with it. I want to achieve this.
Let me preface this with:
a warning to please check the AUP (acceptable use policy) of the server you are using, and/or contact the server administrator to make sure you are not violating any rules.
I can think of quite a few reasons why this won't work. If it doesn't, then there may still be workarounds, but they'll be technically complex.
So if I'm understanding you correctly:
You have very limited access to the server; basically only the ability to upload (apparently) and run Java code.
You've also been able to upload Python code and run it through your Java code through ProcessBuild.
You do not have access to log in to a shell, execute arbitrary command other than through ProcessBuild, etc.
Of course, you do not have the ability to install site-packages into the system Python environment.
So ultimately, what you'll probably need to do is something like:
Create a Python3 virtual environment (which doesn't seem to be what you are actually doing) on WSL. By a "Python3 virtual environment", I mean venv, which allows you to create a user-level (not system-level) directory with your packages.
So something like (from inside your project directory):
python3 -v venv venv
source ./venv/bin/activate
Your path will be adjusted so that your python3 and pip3 commands will be found in the venv path. pip3 install numpy will install it into this virtual environment (not the global/system Python).
Upload that entire venv directory to the server. You seem to have some way of doing this already.
You're going to have to have some way of running the Bash shell through ProcessBuilder. Since you have the ability to run python3 through ProcessBuilder, I'm kind of assuming that you will be able to do this as well.
You'll need to (through ProcessBuild) activate the virtual environment on the server, <path_to_project>/venv/bin/activate and, in the same Bash shell run your code.
This will look something like:
bash -c "source ./venv/bin/activate; python3 main.py"
I have just started using python and pycharm, and I have a windows laptop and a mac where I need to work from. In specific, I created a project including a venv in my windows laptop which is uploaded in one drive and works perfectly for that laptop. So my question is; can I work on that same project from my mac?
Instinctively my answer would be no, because all the virtual environment files originally created in the windows venv are .exe which are incompatible with anything mac related. Trying to open the project and load the interpreter myself has confirmed that this doesn't work.
But then I stumbled on to this post, which would suggest that this person can run a project from a windows and linux OS with the only problem being that they only have to re-select the interpreter.
So is there any way that the above can be done, or a workaround at least? (e.g. creating two venvs for each OS or something).
Yes, you can run the same Python code on both Windows and Mac. You will need to create separate virtual environments on each because the Python interpreter is a .exe file on Windows and something else on Mac.
I suggest that you use git to track changes in your code. Then you can push your code to a service such as GitHub so that your changes are avaialble on all of your computers. You won't add the virtual environments to the git repository, though. These should be created separately on each machine where you want to work on your project.
For the last 3 days, I have been trying to set up virtual Env on Vs Code for python with some luck but I have a few questions that I cant seem to find the answer to.
Does Vs Code have to run in WSL for me to use venv?
When I install venv on my device it doesn't seem to install a Scripts folder inside the vevn folder. Is this out dated information or am I installing it incorrectly. I am installing onto Documents folder inside my D: drive using python3 - m venv venv. The folder does install and does run in WSL mode but I am trying to run it in clear VsCode so I can use other add-ons such as AREPL that doesn't seem to like being ran in WSL.
For extra context I have oh-my-ZSH set up and using the ubuntu command line on my windows device. Any information will be helpful at this point because I am losing my mind.
venv folder in side D: drive
result
If you have the python extension installed you should be able to select your python interpreter at the bottom.
You should then be able to select the appropriate path
Run Set-ExecutionPolicy Unrestricted -scope process before activating virtual environment.
All the best
You don't have to create a virtual environment under WSL, it will work anywhere. But the reason you don't have a Scripts/ directory is because (I bet) you're running VS Code with git bash and that makes Python think you're running under Unix. In that case it creates a bin/ directory. That will also confuse VS Code because the extension thinks you're running under Windows.
I would either create a virtual environment using a Windows terminal like PowerShell or Command Prompt or use WSL2.
I've just setup a new environment for my project and uploaded a python repository including bin, lib and project folder. I'm pretty sure I did same previously and it worked without problem. Now when doing the same on an AWS environment I get the error
-bash: /projects/scrapy/bin/python2.7: cannot execute binary file. However when doing source /projects/scrapy/bin/activate it successfully activates the environment.
From what I understand, python should be able to execute without any issue no matter the environment ?
Any help or pointing to the right direction would be much appreciated!
python should be able to execute without any issue no matter the environment ?
No, the Python binary is tied to your specific OS and computer architecture. Python source code can usually be run on different machines (provided you didn't use OS-specific features), but that's only made possible by compiling a Python interpreter for the specific target environment first.
In other words, a Python binary compiled to run on macOS will not work on Linux.
All that source bin/activate achieves is that it configures your terminal setting to use the bin directory as the first directory on the PATH search path. This doesn't make bin/python work in another environment, it just means that both environments have a working shell interpreter that can run that script.
Create a new virtualenv with a Python binary compiled for Linux, and install the same packages there. Use Pipenv or a requirements.txt file to transfer the dependencies from Mac to Linux.
For example, using Pipenv you'd copy over the Pipfile and Pipfile.lock files to the other computer, then run pipenv install in the directory there and re-create the virtualenv and dependencies from those files.
I recommend you read up on Python development best practices in the The Hitchhiker’s Guide to Python; this includes such topics on how to manage an environment for a project.
I set up virtualenv on network drive using virtualenv python module. It generated me few folders: Include, Lib, Scripts, share, tcl. Inside the folder with these folders i created new one called scr and then pasted there a django app called vistool. Now i created two batch scripts, to allow other users of network drive to run this app:
run.bat (main file):
cd /d "Z:\xx\Tools\New\Widget - Graphs"
cd visual\Scripts
start server.bat
timeout 30
start http://127.0.0.1:8000/graphtool/
This one seems to work, as it does everything it should.
The other one that is called inside run.bat is server.bat, which i placed in Scripts(the same folder where activate.bat is.
server.bat (for calling activate.bat and django built-in server):
call activate.bat
cd..
cd src/vistool
call python manage.py runserver
Now, these two scripts are working fine for me and they do what they want - open a tab with a django project in the browser. But on other computers in my company this doens't work and I have no idea why. Activate.bat from virtualenv package takes the
set "VIRTUAL_ENV=Z:\xxx\Tools\New\Widget - Graphs\visual"
Which should be ok, since everyone has got mapped this network disc the same. The errors that they get are: "Could not find django". Even if i set up my env correctly and installed all the packages I use in it. And the activate.bat seems to work for them. It looks like the virtualenv can't see installed packages? But then why is it working for me?
Edit: When I try to install something on Their computers I get an error, that I don't have runpy installed. When I try to pip install runpy I still can't