Passing flask textbox value to an infinite while loop

I'm running a flask server, with a textbox input and a while loop (in a different thread). I want to pass the input value from the textbox to the while loop.

This is the .py code:

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from flask import Flask, render_template, request

import thread

import time
 
app = Flask(__name__)

def main():
 
    while True:

        time.sleep(5)

        print "var = "+str(var)
 
@app.route("/")

def index():
 
    templateData = {

        'var': var 
 
    }

    return render_template('index.html', **templateData)
 
@app.route('/', methods=['POST'])

def post():
 
    global var 

    var = 0

    var = int(request.form['var'])

    return str("var: " + str(var))
 
if __name__ == "__main__":

    thread.start_new_thread(main, ()) 

    thread.start_new_thread(post, ()) 

    app.run(host='0.0.0.0', port=8083, debug=True)

This is the .html code:

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<!DOCTYPE html>

   <head>

      <title>POST</title>

   </head>

   <body>

    <form method="POST">

        var:<br>

        <input name="var">   

        <br><br>

        Current:    {{ var  }} <br><br>

        <input type="submit">

    </form>

   </body>

</html>

I don't know what is the proper way to get the value to the while loop, because I'm getting mixed signals in the loop. If I for example write 3 in the textbox I'll get...

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var = 0

var = 3

var = 0

var = 3

var = 0

var = 3

var = 0

var = 3

...in the while loop, because it's first reading var = 0 and then var = int(request.form['var'])

Jul 21 '21 #1

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