from Tkinter import *

import time
import json

class PrettyFloat(float):
    def __repr__(self):
        return '%.15g' % self

class App():
    def __init__(self):
        self.root = Tk()

        self.label = Label(text="")
        self.label.pack()

        self.w1 = Scale(self.root, from_=1000, to=1)
        self.w1.pack()
        self.w2 = Scale(self.root, from_=1000, to=1)
        self.w2.pack()
        self.w3 = Scale(self.root, from_=1000, to=1)
        self.w3.pack()
        self.w4 = Scale(self.root, from_=1000, to=1)
        self.w4.pack()
        self.update_clock()
        self.root.mainloop()

    def update_clock(self):

        velocity = float(self.w1.get())/1000
        expressivity = float(self.w2.get())/1000
        sensibility = float(self.w3.get())/1000
        beauty = float(self.w4.get())/1000
        data = {'velocity':PrettyFloat(velocity), 'expressivity':PrettyFloat(expressivity),'sensibility':PrettyFloat(sensibility),'beauty':PrettyFloat(beauty)}
        print( data )
        with open('/tmp/ws.json', 'w') as outfile:
            json.dump(data, outfile)
        now = time.strftime("%H:%M:%S")
        self.label.configure(text=now)
        self.root.after(1000, self.update_clock)


app=App()