execute python script from javascript

Question

I am a newbie to python. I am working on a web app and trying to call a python script from a js script. I am using ajax to call the .py script as follows but I just keep getting the code returned in the response. For simplicity, I have reduced the computation in the python script - even the variable x is not being returned to the js file.

in js function

  return $.ajax({
    type: 'GET',
    url: 'test.py',

    success: function(response) {
      console.log(response);
    },
    error: function(response) {
      return console.error(response);
    }
  });

test.py

#!/usr/bin/python

print("Hello World")

x = 2
return x

The request succeeds because it moves inside success. response is the python code instead of 2. Thanks for your help!

Ivan Velichko · Accepted Answer · 2015-09-11 14:44:54Z

6

You have to use a so called application server to serve HTTP requests in Python. Look at this one or try to use some lightweight web frameworks like Flask.

The simplest web application in the Flask will look like this (in example, put it to app.py file):

from flask import Flask
app = Flask(__name__)

@app.route("/test.py")  # consider to use more elegant URL in your JS
def get_x():
    x = 2
    return x

if __name__ == "__main__":
    # here is starting of the development HTTP server
    app.run()

Then you must start your server by doing:

python app.py

By default it'll start on localhost:3000. Hence, you have to change url in the JS code to http://localhost:3000/test.py.

UPD: Also note that the listed web servers are not production-ready. To build the production-ready configuration you can use something like uWSGI+nginx binding.

edited Sep 11, 2015 at 14:44

answered Sep 11, 2015 at 14:24

Ivan Velichko

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