Python graphique temps réel

#!/usr/bin/python2
# -*- coding: utf-8 -*-

import Tkinter, random, time
import socket, sys, serial
import random, time, threading
from struct import unpack


#########################    PARAMÈTRES    #####################################

# Dimmensions du graphique en pixel
canvas_height = 600
canvas_width = 800

# Valeurs min et max de l'axe des ordonnées
val_min = -200
val_max = 200

# Temps de raffraichissement de l'écran en secondes
refresh = 0.01

# Couleurs des graphes
colors = ["#00FF00", "#FF0000", "#0000FF", "#FFFF00", "#00FFFF", "#FF00FF"]

# Entrées, valeurs acceptées :
#  -> stdin  : récupération des valeurs via l'entrée standard
#       utilisation ./script_qui_affiche_mes_données_ligne_par_ligne | ./real_time_plot.py
#  -> random : valeurs aléatoires, pour les tests
#  -> serial : port série
entree = "random"

if entree == "serial":
    # Configuration du port série
    port = '/dev/pts/13' # sous Windows : COM13
    baudrate = 9600
    # Format binaire des données
    # définit par http://docs.python.org/2/library/struct.html#format-characters
    format = "Ihh"
    # taille en octets du format,
    #    exemple, si format = "hh" (2 shorts, 2 octets chacun), alors taille_format = 4
    taille_format = 8


############################    FIN PARAMÈTRES     #############################

def convert(val):
    return canvas_height - canvas_height*float(val-val_min)/(val_max-val_min)

def convert2(val):
    return (canvas_height - val)/512.0*(val_max-val_min) + val_min



class App:

    def white(self):
        self.lines=[]
        self.lastpos=[]

        self.c.create_rectangle(0, 0, canvas_width, canvas_height, fill="black")

        self.gradations()

    def gradations(self):
        # Vertical gradations
        for y in range(0,canvas_height,32):
                self.c.create_line(0, y, canvas_width, y, fill="#333333",dash=(4, 4))
                self.c.create_text(5, y-10, fill="#999999", text=str(convert2(y)), anchor="w")
        # Horizontal gradations
        for x in range(100,canvas_width,100):
                self.c.create_line(x, 0, x, canvas_height, fill="#333333",dash=(4, 4))
                self.c.create_text(x+3, canvas_height-22, fill="#999999", text=str(x), anchor="w")

        self.lineRedraw=self.c.create_line(0, canvas_width, 0, 0, fill="red")

        self.lines1text=self.c.create_text(canvas_width-150, 10, fill="#00FF00", text=str("TEST"), anchor="e")

    def addPoint(self,vals):
        for i in range(len(vals)):
            val = vals[i]
            if len(self.data) <= i:
                self.data.append([0]*canvas_width)
                self.lastpos.append(0)
                self.lines.append([])
                for x in range(canvas_width):
                    self.lines[i].append(self.c.create_line(x, 0, x, 0, fill=colors[i%len(colors)]))

            self.data[i][self.xpos] = val
            # Display the average value
            #~ self.line1avg+=val
            #~ if self.xpos%10==0:
                    #~ self.c.itemconfig(self.lines1text,text="Average: "+str(self.line1avg/10.0))
                    #~ self.line1avg=0
            if self.xpos>0:
                self.c.coords(self.lines[i][self.xpos],(self.xpos-1,self.lastpos[i],self.xpos,convert(val)))
            if self.xpos<canvas_width:
                self.c.coords(self.lineRedraw,(self.xpos+1,0,self.xpos+1,canvas_width))
            self.lastpos[i]=convert(val)
        self.xpos+=1
        if self.xpos==canvas_width:
                self.xpos=0
                self.totalPoints+=canvas_width
                print "FPS:",self.totalPoints/(time.time()-self.timeStart)
        t.update()

    def __init__(self, t):
        self.xpos=0
        self.line1avg=0
        self.data = []
        self.c = Tkinter.Canvas(t, width=canvas_width, height=canvas_height)
        self.c.pack()
        self.totalPoints=0
        self.white()
        self.timeStart=time.time()




class ValuesReaderSerial:
    def __init__(self):
        self.ser = serial.Serial(
            port=port,
            baudrate=baudrate,
            parity=serial.PARITY_ODD,
            stopbits=serial.STOPBITS_TWO,
            bytesize=serial.SEVENBITS
        )
        if not self.ser.isOpen():
            self.ser.open()
        print "Serial port open"

    def get(self):
        if self.ser.inWaiting() > 0:
            buff = self.ser.read(taille_format);
            values = unpack(format, buff)
            print(values)
            return values
        else:
             return None


class ValuesReaderRandom:
    def __init__(self):
        self.val1 = 20
        self.val2 = 30
        self.val3 = 40
    def get(self):
        self.val1 += random.randint(-1,1)
        self.val2 += random.randint(-3,3)
        self.val3 += random.randint(-2,2)
        return (self.val1, self.val2, self.val3)


class ValuesReaderStdIn:
    def get(self):
        line = sys.stdin.readline()
        vals = map(float, line.split())
        return vals





if entree == "random":
    values = ValuesReaderRandom()
elif entree == "stdin":
    values = ValuesReaderStdIn()
elif entree == "serial":
    values = ValuesReaderSerial()
else:
    RuntimeError("entree invalide")


t = Tkinter.Tk()
a = App(t)

# Boucle principale
while True:
    points = values.get()
    if points != None:
        print points
        a.addPoint(points)
    else:
        t.update()
    time.sleep(refresh)