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So basically, what I want to do is have a user input some data in an HTML form or something (on client end). Have that data be carried over to a server, where the data is put through some python code and the processed result is sent back to the client. I know, I could use javascript to do this on the user side itself, but I want to experiment a bit and make use of some libraries like tensorflow, matplotlib and so on.
Also, is there some way, you know like Web Assembly to run python code on the client side. Like maybe, send data from server or have it fed by the user, and on some virtual environment type setup and processed ??
Note: I know flask exists and I've tried it, but I can't see the same flexibility as you know regular python code.
Thanks in advance 😊
There won't come a definite answer to your question because your question is too broad. But maybe this will give you some starting points.
I see you have two questions:
How can I use python server side
How can I use python client side
Question 1:
First of all you might know that it makes sense to perform operations on a server and not on a client. For example interacting with a central database.
Flask is already lightweight compared to Django which also uses python. If you really want to do a lot on your own you could take a look at websocket or common gateway interface (cgi).
Question 2: This is really not recommended but if you want to play around with WebAssembly and Python a good starting point is PyPyJs: https://github.com/pypyjs/pypyjs!
You can use Brython in the browser, it's pretty spiffy. Full dom-manipulation from python; fully compatible with libraries written in pure python. Really neat stuff.
As for the server-side, if you want to keep it full-python, you'll need to use something like flask, bottle, cherrypy, aiohttp,...
If you find yourself struggling; maybe try starting out writing a simple socket-based microservice? You'll then be able to either farm requests out to it from any other server; or incorporate the code in your (python) server code.
Good luck!
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I am a sort of experienced python programmer. I will quickly describe my situation. For a hobby programming was always nice. I then started working at a company that did lots of manual excel processing. One day I mentioned that I could probably automate this with python.
Things led to another and now there is python doing the excel work multiple times a day running from an Intel NUC i deployed as a small server. It has been some work figuring everything out but the money has been good as well, no complaints.
They are quite happy with me and have lots of different plans.
They want me to design a website where the employees can fill out a form daily and the data can be used elsewhere. However, I've done some html and css programming in highschool, but I know there needs to be a back-end to at least save the data that gets filled.
I dont know where to start. I know SQL is the #1 language in data processing and PHP in handling the back-end. But I already know python which also can do back-end operations.
I have two direct questions but also looking for advice on the whole situation. Feel free to just point anything out; I will read every comment.
My questions:
Could I run the webserver from my Intel NUC? Or is this generally seen as bad practice? Also, is it true that I would only need the domain if I run the webserver myself?
Is it worth it to learn SQL and PHP or should I stick to python?
I have tried looking online but found countless of resources. I would like to create a large database with lots of data I can use anytime. I think SQL is good for this but not looking to waste time.
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I made a small script that solves an combinatorial optimization problem and I would like put it in a website so users can "play" with it, they could send a list of "points" to the server and this script would use a database to return the best combination of these "points".
The problem is I do not have much experience in web dev. I searched how to make an html button execute an script and I found this thread: https://stackoverflow.com/questions/48552343/how-can-i-execute-a-python-script-from-an-html-button#:~:text=To%20run%2C%20open%20command%20prompt,Hope%20this%20helpful.
But there says that an html button calling an python script is not safe. So what would be ideal What would be an ideal, safe alternative so that I could make sure that anyone who accesses my website can execute this script safely?
Well, there's no "easy" answer to your question. What you'd really need to do is to create a web-site in Python on your host computer – using a tool such as Django – and have one of the URLs supported by that website call your script.
Honestly, "what you're asking for here, really isn't the sort of question that StackOverflow is intended to answer." It's too big. Another one of the SE-family sites might be more appropriate, although I'm not quite sure which one ...
The solution that comes to mind would be setting up some Python-API (e.g. with Flask) which you could call with HTTP via JS, having different routes for different usages.
Here's a short overview of Flask showcasing how it could be used.
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I need to build a app which has the following design pattern.
Results displayed on iOS device.
User data stored online (more than
just username/password, also data they themselves put in).
User can sign in with TW/FB etc.
Computation logic code running on backend, which will need to gather data from online sources, and produce results. The server code will be Node.js or Python.
I think some combination of Firebase and Google App engine will work, but I'm not exactly sure which of the design patterns in the following link is the one I'm looking for.
https://cloud.google.com/solutions/mobile/mobile-app-backend-services#design-pattern
?
Based on your description, I think the second one will work best.
https://cloud.google.com/solutions/mobile/mobile-app-backend-services#firebase-appengine-standard
You will likely need to use firebase queue to do what you're planning to do.
https://firebase.googleblog.com/2015/05/introducing-firebase-queue_97.html
Results displayed on iOS device.
Using iOS firebase calls
User data stored online (more than
just username/password, also data they themselves put in).
Using iOS fireabse calls
User can
sign in with TW/FB etc.
Using firebase authentication
Computation logic code running on backend,
which will need to gather data from online sources, and produce
results. The server code will be Node.js or Python.
Using firebase queue running on google app engine
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I have a python script that takes inputs from commandline. I simply want to modify this script so I can run it on web. I want the commandline interface to be replaced by a simple boxes in a web page, and once the script is executed, I want the results to be shown on a webpage like it does in commandline.
Any help on where to start, which python packages to use and which steps to take would be much appreciated.
Until now, I read a little about webapp2 for Google App Engine and web.py. I do not want to use Django.
Thank you!
While you can use a microframework like Flask [1] for quickly getting started, you can get closer to the metal. Try learning about the HTTP protocol and implement your own server using the http module. Python 3's http.server contains a class SimpleHTTPServer [2] which can be very good for understanding how you're communicating between the client and your process.
[1] http://flask.pocoo.org/docs/0.12/quickstart/
[2] https://docs.python.org/2/library/simplehttpserver.html
Have you considered using Flask?
http://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-i-hello-world
This is a pretty great tutorial on how to make a basic webapp.
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I have a small flask app I want to deploy on my server and I'd like to be able to monitor it via an HTTP web interface. I don't need something complicated and I definitely don't want something that's difficult to set up. Previously I've used the Google App engine and the functionality in the Logs tab is completely fine.
The app is served through nginx & gunicorn and uses redis (w/ py-redis) and sqlite (w/ peewee). Ideally I'd like to be able to check the logs for all parts of the system from one place. Is this possible? What's the easiest way?
There is no definitive answer to the predicament and it would be whatever way you are most comfortable with.
You could change all your logging to write to a central database then create a small program which would scrape this data for you. This method also includes configuring a central syslog server:
http://www.linuxjournal.com/content/creating-centralized-syslog-server
What ever way you want to read these files is fine and all depends how much control you want. You could simply name all the logs based on hostname and rsync them to a central server from where you could parse them.
There are also free tools out there which will aid you in choosing you method take a look at:
http://www.linuxjournal.com/content/creating-centralized-syslog-server
There are also some proprietary systems you could use, such as Splunk:
http://www.splunk.com/
This is by no means a definitive list but should aim you in the right direction.