Python Kivy文本输入自动完成。如何使用kv文件获得相同的结果？

我想在我的代码中使用kv文件作为文本输入，但我不知道如何获得相同的结果，如何翻译这行代码：

text_input.bind(text=self.action)

有人能帮我吗

from kivy.app import App
from kivy.lang import Builder
from textwrap import dedent

class MyApp(App):

    def action(self,instance,value):

        word_list = ["hello", "hi", "man", "girl"]

        self.root.suggestion_text = ''

        val = value[value.rfind(' ') + 1:]

        if not val:
            return
        try:
            word = [word for word in word_list
                    if word.startswith(val)][0][len(val):]
            if not word:
                return
            self.root.suggestion_text = word
        except IndexError:
            print('Index Error.')

    def build(self):
        text_input = Builder.load_string(dedent('''
            TextInput
        '''))
        text_input.bind(text=self.action)
        return text_input

if __name__ == "__main__":
    MyApp().run()

---

您需要使用

action

方法绑定

on_text

事件，以引用您的

MyApp

实例（

app.action（args）

）和

”：“

语法：

from kivy.app import App
from kivy.lang import Builder
from textwrap import dedent


class MyApp(App):

    def action(self,instance,value):
        word_list = ["hello", "hi", "man", "girl"]
        self.root.suggestion_text = ''
        val = value[value.rfind(' ') + 1:]

        if not val:
            return
        try:
            word = [word for word in word_list
                    if word.startswith(val)][0][len(val):]
            if not word:
                return
            self.root.suggestion_text = word
        except IndexError:
            print('Index Error.')

    def build(self):
        text_input = Builder.load_string(dedent('''
            TextInput:
                on_text: app.action(self, self.text)
        '''))
        return text_input

if __name__ == "__main__":
    MyApp().run()

---

您需要使用

action

方法绑定

on_text

事件，以引用您的

MyApp

实例（

app.action（args）

）和

”：“

语法：

from kivy.app import App
from kivy.lang import Builder
from textwrap import dedent


class MyApp(App):

    def action(self,instance,value):
        word_list = ["hello", "hi", "man", "girl"]
        self.root.suggestion_text = ''
        val = value[value.rfind(' ') + 1:]

        if not val:
            return
        try:
            word = [word for word in word_list
                    if word.startswith(val)][0][len(val):]
            if not word:
                return
            self.root.suggestion_text = word
        except IndexError:
            print('Index Error.')

    def build(self):
        text_input = Builder.load_string(dedent('''
            TextInput:
                on_text: app.action(self, self.text)
        '''))
        return text_input

if __name__ == "__main__":
    MyApp().run()