获取wxPython中按钮事件的错误

我面临以下问题-每当我尝试为我的任何按钮创建事件侦听器时，都会出现以下错误：

    self.button_compute.Bind(wx.EVT_BUTTON, self.on_click)
    AttributeError: 'BMICalculator' object has no attribute 'button_compute'

我在这个线程中尝试了建议的解决方案，但它对我不起作用

该程序用于计算体重指数，代码如下：

import wx

class BMICalculator(wx.Frame):
    def __init__(self, parent, id):
        wx.Frame.__init__(self, parent, id, "BMI calculator", (600, 800))
        panel = wx.Panel(self)
        self.Centre()
        #Creating the buttons and text fields
        static_text_height = wx.StaticText(panel, -1, "Height", (170, 10))
        height = wx.SpinCtrl(panel, -1, pos=(164, 40), size=(60, -1))
        static_text_weight = wx.StaticText(panel, -1, "Weight", (170, 100))
        weight = wx.SpinCtrl(panel, -1, pos=(164, 130), size=(60, -1))

        button_compute = wx.Button(panel, label="Compute", pos=(110, 180), size=(60, -1))
        button_cancel = wx.Button(panel, label="Cancel", pos=(210, 180), size=(60, -1))

        result_text = wx.StaticText(panel, -1, "Enter your height and weight and press compute", (68, 220))
        #Adding the events for the buttons (Where I get the error)
        self.button_compute.Bind(wx.EVT_BUTTON, self.on_click)

        self.button_cancel.Bind(wx.EVT_CLOSE, self.click_close)

    def compute_BMI(height, weight):
        #BMI = x KG / (y M *  y M)
        height_m = height/100
        BMI = weight/(height_m *  height_m)
        return BMI

    def click_close(self, event):
        self.Close(True)

    def on_click(self, event):
        result_text.SetValue(compute_BMI(height.GetValue(), weight.GetValue()))

def main():
    app = wx.App()
    frame = BMICalculator(None, -1)
    frame.Show()
    app.MainLoop()
    enter code here

if __name__ == '__main__':
    main()

---

任何帮助都将不胜感激

当您创建

按钮\u compute

时，将其作为局部变量留给函数。当您尝试绑定事件时，您将尝试读取尚未创建的实例属性。实际上，您在许多情况下都会这样做，但您的脚本在第一种情况下会出错。将

self.xxx

添加到赋值中，以使函数具有实例属性，而不是局部变量

import wx

class BMICalculator(wx.Frame):
    def __init__(self, parent, id):
        wx.Frame.__init__(self, parent, id, "BMI calculator", (600, 800))
        self.panel = wx.Panel(self)
        self.Centre()
        #Creating the buttons and text fields
        self.static_text_height = wx.StaticText(self.panel, -1, "Height", (170, 10))
        self.height = wx.SpinCtrl(self.panel, -1, pos=(164, 40), size=(60, -1))
        self.static_text_weight = wx.StaticText(self.panel, -1, "Weight", (170, 100))
        self.weight = wx.SpinCtrl(self.panel, -1, pos=(164, 130), size=(60, -1))

        self.button_compute = wx.Button(self.panel, label="Compute", pos=(110, 180), size=(60, -1))
        self.button_cancel = wx.Button(self.panel, label="Cancel", pos=(210, 180), size=(60, -1))

        self.result_text = wx.StaticText(self.panel, -1, "Enter your height and weight and press compute", (68, 220))
        #Adding the events for the buttons (Where I get the error)
        self.button_compute.Bind(wx.EVT_BUTTON, self.on_click)

        self.button_cancel.Bind(wx.EVT_CLOSE, self.click_close)

    def compute_BMI(height, weight):
        #BMI = x KG / (y M *  y M)
        height_m = height/100
        BMI = weight/(height_m *  height_m)
        return BMI

    def click_close(self, event):
        self.Close(True)

    def on_click(self, event):
        self.result_text.SetValue(self.compute_BMI(self.height.GetValue(), self.weight.GetValue()))

def main():
    app = wx.App()
    frame = BMICalculator(None, -1)
    frame.Show()
    app.MainLoop()
    #enter code here

if __name__ == '__main__':
    main()

---

看起来，通过更好地理解类属性和实例属性，您的大多数错误都可以被清除。我找到的关于这个主题的快速教程。（很多缺少的“自我”）谢谢你的回复。我尝试了你的解决方案，但我一直得到相同的错误：/I当我注释掉这两个选项时，程序工作正常buttons@SamuelLJackson那是因为你会跳过所有你使用这些值的地方，但是你想正确使用它们吗？@SamuelLJackson我强烈建议你阅读一下类与实例属性以及python名称空间组织。我已经编辑了我认为需要instance属性的所有地方，但我无法测试，因为我没有Qt而不是wxi。如果您创建为局部变量，小部件将正常创建，但稍后您将没有访问它的引用。