Is it possible to create a user interface without the help of python framework (like tinker or pygame) and use only vanilla python code? If yes, how?
Can you briefly explain how python framework works?
Is the code of different python framework different?
If the computer did not have the framework installed, will the program still runnable if the program uses a framework?
Thanks very much
Yes, after all tinker and pygame are just python classes packaged as modules.
Python frameworks are a bunch of pre-tested and reusable modules that allow you to use and extend upon so you don't have to reinvent the wheel.
Yes, frameworks will have differences in usability and code.
The computer will always need the dependencies, though you can package these in various ways aka create a package that has all your dependencies for the program to run.
If you want as few external dependencies as possible (but still a GUI) I would strongly suggest using a Web-Microframework like bottle (single file) and utilize the user's browser for rendering.
You can make a GUI without any external framework with HTML by setting up a webserver and using the user's browser to render it.
For a browser-GUI without an external Framework: Depending on whether you know JavaScript you can either use XML-RPC (xmlrpc.server+http.server with JS in the browser) or WSGI (wsgiref) (example on that page)
Yes, totally.
Of course the if you do not prepare for this case you cannot run a program without an integral part of it like a Framework - but you can distribute your program with the Framework included.
For XML-RPC
import xmlrpc.server
import http.server
class MyHandler(xmlrpc.server.SimpleXMLRPCRequestHandler,http.server.SimpleHTTPRequestHandler):
pass
This handler will serve files from the current working directory (your actual HTML-UI and JS for communication (there are several XMP-RPC libraries for JS)) but it can also be used like in the XML-RPC-Server example to glue your code and the UI together.
Related
I'm trying to integrate backend code into a Wix site. Im not too picky about how I want to do this, or what language to write in (ideally, I have a locally-hosted Java code that I'd love to simply call). I wouldn't mind re-writing it in JavaScript though, or another language. But before I decide that I'm confused about my options. I can code but I'm new to the concepts like modules, APIs, & servers.
According to my research, back-end code with Wix is supposed to be easy (or at least do-able and not THAT complicated)....
From this webpage https://support.wix.com/en/article/corvid-calling-server-side-code-from-the-front-end-with-web-modules,
"Web modules are exclusive to Corvid and enable you to write functions that run server-side in the backend, and easily call them in your client-side code. With web modules you can import functions from backend into files or scripts in public, knowing they will run server-side. Corvid handles all the client-server communication required to enable this access."
And from this: https://www.sitepoint.com/what-is-wix-code/
"It’s serverless: All this added functionality comes in a serverless environment that lets you get your work done without any of the normal full-stack development headaches.
Just code and go: Wix Code has a built-in, online IDE and backend so you can just add the code you need to your page or your site, publish, and you’re live."
So, I thought they have a backend IDE where I can write backend code directly, or I could call my Java program. But, as I tried doing this and finding tutorials, it seems I can really only do this by calling a public API from the backend...?
https://youtu.be/tuu0D1izrUU
But ive also read (and someone who supposedly has done it before told me this) that Wix integrates with node.js, which is a backend version of JavaScript.
Can I use a Wix domain for a NodeJS app?
But, when I go into my Wix site I cannot find any option for using Node JS, and doing research on that gives me no useful results.
So, I'm thoroughly confused on what the capabilities are here. Can someone help me make sense of this?
Why are there no tutorials showing explicit code in the Corvid backend module? What's stopping me from simply writing my Java program there in a module? Do I really need an API endpoint to call and pass to the front end?
Is Node JS supported or not - has anyone done this before?
Also, in one link above they said everything is "serverless". But if I have to set up my own API endpoint won't I need to set up my own server??
There are basically two ways to go about this, which you seem to have already discovered.
Write your backend code in your Wix site. Indeed, the backend is built on Node.js as you can see here. Using this approach you will have to use JavaScript. As you seem to have found, you write this code in the Backend section of your site in a Web Module. Pros: you don't need to worry about managing a server and all your code is in one place.
Expose your already existing Java code as an API that your Wix site can call using the wix-fetch API. Pros: you don't need to rewrite your code.
I have a Python web application that I want to wrap in Electron. The web application backend is a very slim Flask app that forwarded calls to a Python package that does the processing, and formats the results. We have a React frontend that talks to this backend. We also have a pip based installation, that runs the Flask backend and serves the frontend, so you can pip install run the server and use it from your browser. This is similar to how Pgadmin 4 works.
Since this application is only used by people on their own computers, and never installed on a server, I want to convert it into an Electron app. However, I couldn't figure out how to distribute this application in one setup for Windows, MacOS and Linux. I don't want the users to have to install Python on their computers.
How can I do that?
There is a couple of clues on how to do that, even though I'm still unsure whether all necessary python modules can be bundled easily.
I have a similar case, even though I just want to bundle a prototype in an electron application so I can send it to collaborators for evaluation, without any intent of shipping it to final users.
My list of hints:
https://github.com/matbloch/electron-flask
https://efficientcoder.net/connect-python-3-electron-nodejs-build-desktop-apps/
https://www.techiediaries.com/flask-electron-tutorial/
I really don't see why you need to throw electron in the mix, instead of just using your browser. I reckon that a barebone electron app that serves your page in a single window is going to be 50Mb. The key benefits of electron is that it lets you do system calls (access local files / devices), but if you are running flask you already have this ability.
Your main obstacle is how to distribute the flask app, specifically without installing python - and electron is not going to make things any easier to that respect. You should probably look at pyinstaller which lets you create executables that embed python.
Now, if you're talking of getting rid of python altogether, then indeed you could do that, nodejs has a rich set of libraries for everything os / db-related, even image processing, but it will lack in data science and processing. YMMV.
Would it be technically possible to embed Python into a Flex/AIR application by compiling CPython code using Alchemy?
(I'm guessing the project should be called Flython.)
Yes.
But don't expect all the standard modules to build. Some system calls won't translate. It would be a lot of work to port.
I have a python program that I would like to present as a simple web application. The program currently uses sqlite for storage. I also need to distribute the whole thing to colleagues so having something standalone and easy to start would be ideal ( no install if possible). This web app is meant to be used locally , not by multiple users over a network.
Is there a suitable python framework that might fit my needs? I looked at Django so far but it seems a bit heavy handed for what I need.
Thanks for any suggestions.
I have never tried it myself, but you could try Bottle:
Bottle is a fast, simple and lightweight WSGI micro web-framework for
Python. It is distributed as a single file module and has no
dependencies other than the Python Standard Library.
try http://docs.python.org/library/simplehttpserver.html
As web frameworks are not part of the standard lib, you will have to install something in every case. I would propse to look at http://flask.pocoo.org/. It has a build in WSGI server.
Lots of choices for Python web frameworks! Another is web2py which is designed to work out of the box and allows, but doesn't require, through-the-web development. It is mature and has a strong community and is well-documented.
Tornado as a framework may be a lot more than what you're looking for. However it will meet the requirement of being a completely python based web server. http://tornadoweb.org
I generally just download the source, drop it in /tornado/ of my project and do includes there from the app.
I don't think that any web framework is specifically oriented for the use case you're talking about; They all assume they are running on a server and there's a browser on a remote machine that is accessing them.
A better approach is to think about the HTTP server you'll be using. It's probably preferable to use a server that's as easy to pack and ship as the rest of the python code you'll be using. Now most frameworks provide a 'development' server that's easy to invoke from the command line, but most of them are intended to be "easy for the developer" which often means they are restricted to a single thread. This is bad for deployment because single threaded servers will always feel a bit sluggish.
CherryPy stands out in contrast, by providing a full featured, embedded server that's easy to configure for many use cases, and is available by default with the rest of the framework. There are probably others, but I haven't used 'em.
Hi I want to deploy a matlab application on the web using python. Is there a way to do it.I have converted my application into jar files (java classes) as per the documentation on math works site. Can someone point me in the right direction to go ahead
The fact that your Matlab code is packaged up as Jars may not help that much here, at least not with pure Python.
There are a few ways you can take code written in Java and expose it to Python.
Jython
If you are willing to give Jython a shot this may be a really easy way to provide a Django interface to your jars.
Basically you'll get to write a normal Django App and also use Jython to work natively with your Jars. This could be the best of both worlds assuming you aren't tied to CPython.
Django-Jython
Java Compatibility Interfaces
On CPYTHON either of the following projects will help you work with the code in your Jar files:
JCC: Create a Python extension module that wraps your Jar file
JPype: Provides an API for running the JVM and calling into code running in that JVM from Python.
Separate Process:
If you have a standalone program written in Matlab (really any language) you could execute it as a child process of your Django application. You'd look into a simple web form in Django that allowed you to submit values to be inputs to this process and then in your view (after validating the form) you'd do something like:
command = "mymatlabprogram.exe %s"%(arg1,)
process = subprocess.Popen(command.split())
stdout, stderr = process.communicate()
Assuming that worked you could pull answers out of stdout or error messages out of stderr. You could serve an image created by that process, etc. Once something like this is working you could look into celeryd to extract the subprocess stuff from your web app.
The advantage of working with a separate process is that you isolate bugs in your Matlab code from breaking your web application and vice versus. The disadvantage is you have to serialize everything and work with multiple times between the client's browser and your web app, between the web app and the executable, and back to the client.