Develop Reference

installing python in a docker container

I'm new to coding and been fiddling around with docker containers and services
I have installed a temporary vscode server on my raspberry and deployed on my local lan for accessing it from various machines
Now i've been trying to create a flask app and run it from the container and trying to figure out how to publish and run the flask web server since i can't figure out what ip should i host it on (the default i always used was host=127.0.0.1 port=8080, but that would bring me to the local machine i'm visiting it from)
So while i was troubleshooting to understand what to do with exposed ports etc i've stopped the container and changed the docker-compose file, (i have a path set for the config's permanent storage, so my vscode setting are actually saved and persistent between deployments)
But I'm having the problem that every time i stop and re deploy the container i loose my python3 installation, and have to re run apt-update, apt-upgrade, apt install python3-pip and every python packages i need for the project
Where am i going wrong?
Silly question, but where does python get installed, and why isn't it persistent since i have my config path set?
I read that python gets installed in usr/local/lib, should i also map those directories to the persistent storage folder?
how should i do that?
thanks

How and where do I deploy a Flask + React web app?

I am building a web app with a Flask backend and a React front end, and I would now like to deploy it, buy a domain, and set it up. What is the easiest way to do this?
Here's my research:
This website shows how to deploy an app on Heroku. I did this, but Heroku seems to be unavailable a lot, at least today.
This blog post seems to suggest I could create a GCE instance and run things there, though (i) it seems like a little more configuration that I'd like (ii) I would need a way to link the nginx server to my domain. I suppose the benefit is that the two apps run on the same machine?
This SO post had OP redo his work and it somehow worked. I'm not sure how to deploy Docker apps online, though.
Is there an easy way to deploy to a reliable service (Google Cloud/AWS/Azure)? My code has the following structure:
build/ # Result of `yarn build`
server/
server.py # Flask server
src/ # React code
Component/
Component.js
Component.sass
index.css
index.js
...
public/
index.html
# Images and other stuff.

I figured out how to do this using Azure. I created an App Service, then installed the Azure Tools VS Code extension. You need to move the Python server to the root directory and rename it to app.py (so the .env is also in the root folder), and then you can right-click your App Service in VS Code (in the Azure Tools tab) and then click Deploy to Web App. Easy!

Flask webapp deployed on IIS does not serve network folder files

Firstly this is my debut query on stack overflow , hope i have maintained the required protocols.
Have a flask app running on Windows 2012.
I have a simple flask app which serves local and network files (.pdf,.csv). When i run the flask app thru' terminal it is able to serve both Local and network files when the embedded url is clicked .The files open in a new tab.
But when i launch it thru IIS, it is only able to serve local files and throws access denied messages[Error 13] whenever the network file url is clicked
Have been breaking my head over it.
Any help is appreciated.

Trying to change the identity to Network Service.

Flask app doesn't builds on MS Azure cloud

I want to deploy my flask web application on Azure cloud. In Deployment options, I have selected GitHub as source destination for my flask code. after doing the configuration test successfully, the init.py file now starts building;
Now when I go to my application link, it shows me this;
Now at this point, I went back to my deployment options, it says Building failed;
the log generated for this building failed can be seen in the first picture. All the tests has passed except the last one "Performance test". Have anyone encountered the same issue before ? what can be the reason for that ?
I am running the application on localhost # port 8000.
from flask import Flask
app = Flask(__name__)
#app.route("/")
def hello():
return "Hello World!"
if __name__ == "__main__":
app.run()
Do I need to run it on another IP ?

You cannot listen on port 8000 in Web Apps. Only port 80 or 443. You'll need to read the port number from the environment, to know what to listen on.

If you created the Azure Webapp using the Flask tool, the default app is called FlaskWebProject1. If your app has a different name, you need to modify web.config in your wwwroot folder to reflect the correct app name.
Then redeploy using the Azure portal or change it in your GIT and push again.

Based on your 500 error, I think some python packages are not installed correctly.
To check your code is working correctly in naive manner, do as follows.
If you are developing on Windows machine, copy all of your site-packages files in development machine to WebApp /site/wwwroot/env/Lib/site-packages folder.
Hit Restart in Azure Portal and F5 in browser.
If it works, your deployment process might have a problem. Mainly it is caused by library installation.
First, check you have requirements.txt at the root folder. This documentation describes some considerations to load Flask on Azure WebApp. Of course, it would be really helpful to read the documentation from the first line carefully.
Second, login WebApp via FTP and check the package is installed correctly. You can see /pip folder has pip.log file, and /site/wwwroot/env/Lib/site-packages folder has its libraries.
For some libraries which you might require more than simple hello world app, you may have to push x86 .whl files along with python codes as they are not installed correctly in x86 environment.
Additionally, in order to show internal error to outside, consider to apply this option during development (not for production).

Distributing a local Flask app

I've made a simple Flask app which is essentially a wrapper around sqlite3. It basically runs the dev server locally and you can access the interface from a web browser. At present, it functions exactly as it should.
I need to run it on a computer operated by someone with less-than-advanced computing skills. I could install Python on the computer, and then run my .py file, but I am uncomfortable with the files involved being "out in the open". Is there a way I can put this app into an executable file? I've attempted to use both py2exe and cx_freeze, but both of those raised an ImportError on "image". I also tried zipping the file (__main__.py and all that) but was greeted with 500 errors attempting to run the file (I am assuming that the file couldn't access the templates for some reason.)
How can I deploy this Flask app as an executable?

Host it.
Since you created it in Flask, and its a web app - hosting it should be trivial. Dump it on any of the PaaS providers like Heroku, Google App Engine, OpenShift or spin up a micro instance on EC2 and host it there.
Creating an executable is not the solution.

Why distribute it at all? If the user you want to use it is on the same local network as the Flask application, just give them the IP address and they can access it via a browser just as you are doing, and no access to the source code either!