Kivy TextInput自動補全。 如何使用kv文件獲得相同的結果？

Question

我想在我的代碼中為TextInput使用一個kv文件，但是我不知道如何獲得相同的結果，以及如何翻譯此行代碼：

text_input.bind(text=self.action)

有人可以幫助我嗎？

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()

Answer 1

您需要使用app關鍵字引用MyApp實例（ app.action(args) ）和“:”語法，將on_text事件與action方法綁定on_text ：

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()