用beatufulsoup安全地穿入tkinter

问题描述

我一直在网上搜索,但似乎找不到安全地穿线tkinter的方法。

我的目标:

  • 我正在获取前25个主要股票的实时股价详细信息 公司,并将其显示在tkinter可滚动框架中。

我要解决的问题:

  • 为了尝试延迟,我允许更新每5秒开始一次, 但不幸的是我的代码仍然冻结。当我滚动框架时, 窗户令人发指。

  • 我读到我应该有一个单独的线程来处理数据,并且
    将此数据发送到主GUI,但我不知道该怎么做
    此刻

这是我的代码:

class SecondPage(tk.Frame):

    def __init__(self,parent,controller):
        tk.Frame.__init__(self,parent)

        self.LiveCanvas = Canvas(self,height=600,bg='#252A2E',highlightthickness=0)
        self.LiveFrame = tk.Frame(self.LiveCanvas)
        self.LiveFrame.configure(bg='#252527')
        self.LiveFrame.pack(fill='both',expand=True)
        self.LiveFrame.bind("<Configure>",self.onFrameConfigure)
        self.LiveCanvas.bind("<Configure>",self.onCanvasConfigure)
        self.LiveCanvas.place(anchor=tk.NE,relx=0.48,y=200,relwidth=0.45)
        self.LiveCanvas.create_window((0,0),window=self.LiveFrame,tags='self.LiveFrame')
        self.Scrollbar = Scrollbar(self,orient="vertical",command=self.LiveCanvas.yview)  
        self.Scrollbar.place(in_=self.LiveCanvas,relx=1,x=25,y=0,relheight=1,anchor=tk.NE)

        for count in range(25):
            StockRow = Canvas(self.LiveFrame,height=58,bg='#252527')


    def onFrameConfigure(self,event):
        self.LiveCanvas.configure(scrollregion=self.LiveCanvas.bbox("all"))

    def onCanvasConfigure(self,event):
        # width is tweaked to account for window borders
        width = event.width
        self.LiveCanvas.itemconfigure("self.LiveFrame",width=width)


class Live():
    def __init__(self,SecondPage,LiveFrame,LiveCanvas):
        self.LiveFrame = LiveFrame
        self.LiveCanvas = LiveCanvas
        self.UpdateLabel = Label(SecondPage,text='Last Update '+ strftime('%H:%M:%S')).place(x=100,y=100)

        threading._start_new_thread(self.update,())


    def update(self):
        while True:

            LiveStocksUrl = "https://uk.finance.yahoo.com/most-active"
            LiveStocksUrlOpened = urlopen(LiveStocksUrl)
            HtmlPage = LiveStocksUrlOpened.read()
            LiveStocksUrlOpened.close()

            HttmlPageSoup = BeautifulSoup(HtmlPage,'html.parser')
            LiveStocksRows = HttmlPageSoup.find_all("tr",class_="simpTblRow")



            co = -1

            count = -1
            for tr in LiveStocksRows:
                count = count + 1

                StockData = tr.find_all('td')
                StockDataRow = ([i.text for i in StockData])

                Symbol,CompanyName,Price,Change,PercentageChange,Volume,AverageVolume,MarketCap,PE = [StockDataRow[index] for index in (0,1,2,3,4,5,6,7,8)]

                for child in self.LiveFrame.winfo_children():
                    co = co + 1
                    if count == co:
                        for t in child.winfo_children():
                            if t.winfo_class() == "Label":
                                t.place_forget()
                            hi = self.LiveFrame.winfo_children()
                            SymbolLabel = Label(child,text=Symbol,bg='#252527',fg='#EFEFEF').place(x=25,y=17)
                            NameLabel = Label(child,text=CompanyName,fg='#EFEFEF').place(x=100,y=17)
                            PriceLabel = Label(child,text=Price,fg='#EFEFEF').place(x=320,y=17)
                            ChangeLabel = Label(child,text=Change + '(' + PercentageChange + ')',fg='#EFEFEF').place(x=380,y=17)
                            MarketCapLabel = Label(child,text=MarketCap,fg='#EFEFEF').place(x=500,y=17)
                    else:
                        pass
                co = -1
            self.UpdateLabel.configure(text='Last Update '+ strftime('%H:%M:%S'))
            time.sleep(5)

如果您需要我使用所有导入内容和其余代码来编辑代码,我很乐意这样做,我只是想确保它易于阅读并且直截了当。

解决方法

大多数GUI不喜欢在线程中使用小部件。在线程中,您可以获取数据,但是您可能必须使用queue将其发送到主线程,该主线程应使用root.after()定期检查queue中是否有新数据并更新{{1 }}在主线程中


带有widgetsqueue的最小工作代码,用于从线程获取数据并更新小部件。

after()

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