使用 after() 方法循环函数

Question

我设计了一个 GUI 来从文本文件中绘制图形。但是，当我在文本文件中添加新点时，绘图不会更新。我尝试使用 after() 方法继续循环我的函数来绘制图形，但它无法工作。它不会更新我的绘图，甚至不会打印出“正在更新...”，如代码所示。想知道出了什么问题，有没有更好的方法来更新我的情节？谢谢。

class Timer: 
def __init__(self, parent): 
    self.parent = parent
    self.time1 = " "
    self.time_label = Label(topFrame, text=self.time1, font = "Helvetica 12 bold")
    self.time_label.grid(row = 1, column = 1)
    self.random_lbl = Label(topFrame, text="Virtual Microgrid", font = "Helvetica 16 bold italic")
    self.random_lbl.grid(row = 0, column = 1)
    self.random_lbl = Label(topFrame, text="GRAPHS", font = "Helvetica 12 bold" )
    self.random_lbl.grid(row = 2, column = 5)
    self.update_clock() 

def update_clock(self): 
    self.time2 = time.strftime("%H:%M:%S")
    self.time1 = self.time2 
    self.time_label.config(text=self.time1)
    self.parent.after(200, self.update_clock) 

def update(self):
    self.animate()
    print("Updating.....")
    self.parent.after(1, self.update)

def animate():
    graph_data = open('example.txt', 'r').read()
    lines = graph_data.split('\n')
    xs = []
    ys = []
    for line in lines:
        if len(line) > 1:
            x,y = line.split(',')
            xs.append(x)
            ys.append(y)

    graph_data = open('example1.txt', 'r').read()
    lines = graph_data.split('\n')
    xs1 = []
    ys1 = []
    for line in lines:
        if len(line) > 1:
            x,y = line.split(',')
            xs1.append(x)
            ys1.append(y)

            graph_data = open('example2.txt', 'r').read()
            lines = graph_data.split('\n')
            xs2 = []
            ys2 = []
            for line in lines:
                if len(line) > 1:
                    x,y = line.split(',')
                    xs2.append(x)
                    ys2.append(y)

            graph_data = open('example3.txt', 'r').read()
            lines = graph_data.split('\n')
            xs3 = []
            ys3 = []
            for line in lines:
                if len(line) > 1:
                    x,y = line.split(',')
                    xs3.append(x)
                    ys3.append(y)

            graph_data = open('example4.txt', 'r').read()
            lines = graph_data.split('\n')
            xs4 = []
            ys4 = []
            for line in lines:
                if len(line) > 1:
                    x,y = line.split(',')
                    xs4.append(x)
                    ys4.append(y)

            fig = Figure(figsize=(13,3.25))
            a = fig.add_subplot(111)
            a.plot(xs,ys,color='red')
            a.plot(xs1,ys1,color='blue')
            a.plot(xs4,ys4,color='black')

            a.set_title ("SOURCE", fontsize=8)
            a.set_ylabel("Voltage/V", fontsize=8)
            a.set_xlabel("Time/s", fontsize=8)
            a.grid()

            fig5 = Figure(figsize=(13,3.25))
            f = fig5.add_subplot(111)
            f.plot(xs2,ys2,color='red')
            f.plot(xs3,ys3,color='blue')


            f.set_title ("LOAD", fontsize=8)
            f.set_ylabel("Voltage/V", fontsize=8)
            f.set_xlabel("Time/s", fontsize=8)
            f.grid()

            canvas = FigureCanvasTkAgg(fig, master=rightFrame)
            canvas.get_tk_widget().grid(row = 2, column = 1, sticky = "nswe")
            canvas.draw()

            canvas5 = FigureCanvasTkAgg(fig5, master=rightFrame)
            canvas5.get_tk_widget().grid(row = 3, column = 1, sticky = "nswe")
            canvas5.draw() 

Answer 1

我建议您每次获取所有数据后关闭文件。 看下面

Is close() necessary when using iterator on a Python file object