主目录文件中出现错误“/ .kv /pi/Desktop/ali/my9.kv”

Question

我的代码点亮了一个LED。这个程序可以在Tkinter中运行，但是当我用Kivy编写它时，它就不能运行了！有什么问题吗？

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，TheRequest = requests.get('http://192.168.43.91/on') NameError:未定义名称'requests‘

Answer 1

您需要在kv文件中import requests模块。并将TheRequest = requests.get('http://192.168.43.91/on')语句添加到Button的on_release方法下。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/')