Question

我正在开发Windows机器上的以下tkinter代码（并且正在工作），但是当移动到raspberry pi（Pyhton 3.2）时，没有用。它没有任何错误（在shell上）并且控制台打印正在运行。实际的GUI缺失.....

我尝试了其他较小的修补程序，并且工作正常。在raspberry pi上，我进入菜单，编程，空闲3，打开文件并执行它。

我可以查看任何日志文件吗？

代码基本上有2页，在第一页上我显示了两个varibles aux [0]和aux [1]。这些值通过串行COM在更新功能下捕获。仪表类是实际的仪表图。在更新功能中，您可以看到打印功能，它在shell中显示这些值。这很有效。

知道可能出现什么问题吗？

import serial
from tkinter import *
import tkinter as tk
import tkinter.font as tkf
import math

LARGE_FONT= ("Verdana", 12)
data = [20, 15, 10, 7, 5, 4, 3, 2, 1, 1, 0, 23,12,4,2,0,9,4]
c_height = 350

velocidad_total=0
direccion_total=0
i=0

direccion=[]
velocidad=[]
ser = serial.Serial('COM2')# ttyUSB0
ser.baudrate = 9600

class Meter(tk.Canvas):

    def __init__(self,master,tod,*args,**kwargs):
        super(Meter,self).__init__(master,*args,**kwargs)

        #tod='day'
        self.layoutparams(tod)
        self.graphics(tod)
        self.createhand(tod)
        self.setrange()


    def layoutparams(self,tod):
        # set parameters that control the layout
        height = int(self['height'])



 def set(self,direccion,velocidad):
        # call this to set the hand
        # convert value to range 0,100
        #deg = 300*(direccion - self.start)/self.range - 240
        self.itemconfigure(self.textid,text = str(velocidad))
        rad = math.radians(direccion-90)
        # reposition hand
        self.coords(self.handid,self.centrex+30*math.cos(rad)
        ,self.centrey+30*math.sin(rad)
        ,self.centrex+self.handlen*math.cos(rad), self.centrey+self.handlen*math.sin(rad))
        #self.coords(self.handid,self.centrex+25*math.cos(rad-0.31),self.centrey-15*math.sin(rad-0.31)
        # ,self.centrex+15*math.cos(rad+0.31),self.centrey-25*math.sin(rad+0.31),self.centrex+90*math.cos(rad),self.centrey-90*math.sin(rad))



    def blob(self,colour):
        # call this to change the colour of the blob
        self.itemconfigure(self.blobid,fill = colour,outline = colour)

the meter class continues. Omited to make this as short as possible

class SeaofBTCapp(tk.Tk):

    def __init__(self, *args, **kwargs):

        tk.Tk.__init__(self, *args, **kwargs)
        container = tk.Frame(self)

        container.pack(side="top", fill="both", expand = True)

        container.grid_rowconfigure(0, weight=1)
        container.grid_columnconfigure(0, weight=1)

        self.frames = {}

        for F in (StartPage, PageOne, PageTwo):
frame = F(container, self)

            self.frames[F] = frame

            frame.grid(row=0, column=0, sticky="nsew")

        self.show_frame(StartPage)

    def show_frame(self, cont):

        frame = self.frames[cont]
        frame.tkraise()


class StartPage(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self,parent)
        label = tk.Label(self, text="Start Page", font=LARGE_FONT)
        #label.pack(pady=10,padx=10)
        label.grid(column=0,row=0)
        button = tk.Button(self, text="HISTORIA",
                            command=lambda: controller.show_frame(PageOne))
        #button.pack()
        button.grid(column=0, row=1,sticky=(E) )
        button2 = tk.Button(self, text="NOCHE",
                            command=lambda: controller.show_frame(PageTwo))
        #button2.pack()
        button2.grid(column=1, row=1, sticky=(W))

        self.print_value()

    def print_value(self):

        w=Meter(self,height = 400,width = 400,tod='day')

        #w.pack()
        w.grid (column=0, row =3,columnspan=3,rowspan=3)
        if len(direccion)!=0:
            w.set(int(direccion[-1]),int(velocidad[-1]))


class PageOne(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        label = tk.Label(self, text="Page One!!!", font=LARGE_FONT)
        label.pack(pady=10,padx=10)

        button1 = tk.Button(self, text="Back to Home",
                            command=lambda: controller.show_frame(StartPage))
        button1.pack()

        button2 = tk.Button(self, text="Page Two",
                            command=lambda: controller.show_frame(PageTwo))
        button2.pack()

        self.imprimir()

        self.canvas = Canvas(self, width=400, height=400, bg = 'white')
        self.canvas.pack()



def update():
        global velocidad_total
        global direccion_total
        global i
        c = StringVar()
        c=ser.readline()
        aux2= str(c, 'utf-8')
        aux = aux2.split(" ")
        direccion.append(int(aux[0]))
        velocidad.append(int(aux[1]))

        velocidad_total = velocidad_total+velocidad[i]
        direccion_total = direccion_total+direccion[i]
        if (i>299): # para retener 5 min de estadisticas que llegan c/u 1seg
            i=0
            velocidad_media= velocidad_total/300
            direccion_media = direccion_total/300

        print (aux[0]," ",aux[1])
        #theta.set(c)
        #w.set(aux[0],aux[1])
        app.after(100,update)


app=SeaofBTCapp()
app.after(100,update)
app.mainloop()

Answer 1

解决此问题的最佳方法是创建mcve。这将要求您在仍然看到问题的同时删除尽可能多的代码。最终你将删除一些东西，错误将消失。然后，您将知道导致问题的代码。 “

我的猜测是，它只是在等待这行代码的数据：

c=ser.readline()

tkinter代码不适用于raspberry pi

1 个答案: