.kv 文件中的错误==> 文件“/home/pi/Desktop/ali/my9.kv”

Question

我的代码点亮了一个 LED。这个程序在 Tkinter 中有效，但当我用 Kivy 编写它时它不起作用！！有什么问题？

kivy.py ==>

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen
import requests

class MainWindow(Screen):
    pass


class WindowManager(ScreenManager):
    pass


kv = Builder.load_file("my9.kv")


class MyMainApp(App):
    def build(self):
        return kv


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

my.kv==>

WindowManager:
    MainWindow:

<MainWindow>:
    name: "main"

    GridLayout:
        cols:1

        Button:
            text: "Submit"
                TheRequest = requests.get('http://192.168.43.91/on')

错误 ==> 文件“/home/pi/Desktop/ali/my9.kv”，第 13 行，在 TheRequest = requests.get('http://192.168.43.91/on') NameError: 名称 'requests' 未定义

Answer 1

您需要 import kv 文件中的 requests 模块。并且还在Button的on_release方法下添加TheRequest = requests.get('http://192.168.43.91/on')语句。修改后的 kv 文件如下所示：

#:import requests requests
WindowManager:
    MainWindow:

<MainWindow>:
    name: "main"

    GridLayout:
        cols:1

        Button:
            text: "Submit"
            on_release:
                TheRequest = requests.get('https://www.android.com/')

.kv 文件中的错误==> 文件“/home/pi/Desktop/ali/my9.kv”

error in .kv file==> File "/home/pi/Desktop/ali/my9.kv"

python

python-3.x

kivy

kivymd