I have a small flask app where it takes user input and returns some text. Here the user input is fed to another python script say temp.py and this temp.py will return a value which should be returned to user. For eg:

flask.py

from flask import Flask, render_template, request
app = Flask(__name__)

@app.route('/')
def result():
    return render_template("index.html")

@app.route('/getconfig', methods=['GET', 'POST'])
def config():
    value = request.form['config']
    print ("This is the user value :  ", value);
    // This value is written to a file say x.pol and my temp.py reads from x.pol file and writes the output to y.pol. I'm not sure how to trigger the script like "python temp.py" on the server.
    // The reason I'm doing this because I don't want to tweak the third party tool where, the third party tool reads from input files and generates output files. 

    return content_generated_by_temp.py // by reading y.pol.

if __name__ == '__main__':
   app.run(debug = True)

By the way, temp.py is itself a nightmare. I understood what the tool does. For more info about the tool: Google Caprica