Python Kivy将按钮文本传递到功能？

我正在尝试创建一个简单的计算器。下面是我的代码：

from kivy.app import App
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.button import Button


class MyApp(App):
    def build(self):
        displays = ["(", ")", "C", "<-", "7", "8", "9", " / ", "4", "5", "6", " * ", "1", "2", "3", " - ", ".", "0",
                    "=", " + "]
        iterator = 0
        layout = FloatLayout()
        for row in range(5):
            for column in range(4):
                posx = column * .25
                posy = .75 - (row * .18)
                button = Button(text=displays[iterator], pos_hint={"x": posx, "y": posy}, size_hint=(.25, .18),
                                color=(1, 0, 1, 1), background_color=(0, 0, 0, 1), outline_color=(1, 0, 1, 1))
                layout.add_widget(button)
                button.bind(on_press=lambda text=button.text: self.press(button_text=text))

                iterator += 1

        return layout

    def press(self, button_text):
        print("Called! ", button_text)


MyApp().run()

它不是传递按钮的文本，而是传递

调用！0x0CAD6D88处的kivy.uix.button.button对象（内部打开-关闭[小于大于括号HTML括号？]，但在此处会导致格式问题）

根据我有限的经验，似乎我传递的是按钮对象本身，而不是预期的文本。这是我第一次尝试使用Kivy，救命啊？谢谢。
您使用的
lambda
不正确，应该是

button.bind(on_press=lambda button: self.press(button.text))

但是，您不需要使用
lambda
函数，只需获取传递给回调的实例的
text
属性即可：

from kivy.app import App
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.button import Button


class MyApp(App):
    def build(self):
        displays = ["(", ")", "C", "<-", "7", "8", "9", " / ", "4", "5", "6", " * ", "1", "2", "3", " - ", ".", "0",
                    "=", " + "]
        iterator = 0
        layout = FloatLayout()
        for row in range(5):
            for column in range(4):
                posx = column * .25
                posy = .75 - (row * .18)
                button = Button(text=displays[iterator], pos_hint={"x": posx, "y": posy}, size_hint=(.25, .18),
                                color=(1, 0, 1, 1), background_color=(0, 0, 0, 1), outline_color=(1, 0, 1, 1))
                layout.add_widget(button)
                button.bind(on_press=self.press)
                iterator += 1
        return layout

    def press(self, button):
        print("Called! ", button.text)



MyApp().run()

从kivy.app导入应用
从kivy.uix.floatlayout导入floatlayout
从kivy.uix.button导入按钮
类别MyApp（应用程序）：
def生成（自）：
displays=[“（“，”），“C”，“哦！这是我尝试使用lambda的少数几次之一，我从tkinter版本中提取了大部分代码。我可以问一下press方法如何知道调用了哪个按钮吗？看起来kivy不管怎样都会传递button对象。谢谢
from kivy.app import App
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.button import Button


class MyApp(App):
    def build(self):
        displays = ["(", ")", "C", "<-", "7", "8", "9", " / ", "4", "5", "6", " * ", "1", "2", "3", " - ", ".", "0",
                    "=", " + "]
        iterator = 0
        layout = FloatLayout()
        for row in range(5):
            for column in range(4):
                posx = column * .25
                posy = .75 - (row * .18)
                button = Button(text=displays[iterator], pos_hint={"x": posx, "y": posy}, size_hint=(.25, .18),
                                color=(1, 0, 1, 1), background_color=(0, 0, 0, 1), outline_color=(1, 0, 1, 1))
                layout.add_widget(button)
                button.bind(on_press=self.press)
                iterator += 1
        return layout

    def press(self, button):
        print("Called! ", button.text)



MyApp().run()