为什么 kivy 在 Visual Studio 代码中不起作用？

Question

我正在用 kivy 编写一段代码，并安装了所有的包。

当我运行代码时，它仍然显示“没有名为 kivy 的模块”。

这些模块是从命令提示符和 VS 代码终端安装的，尽管几天前这段代码运行良好。今天我打开它，它告诉我这个错误

这是我的代码

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.properties import ObjectProperty
from kivy.uix.popup import Popup
from kivy.uix.label import Label
from database import DataBase


class CreateAccountWindow(Screen):
    namee = ObjectProperty(None)
    email = ObjectProperty(None)
    password = ObjectProperty(None)

    def submit(self):
        if self.namee.text != "" and self.email.text != "" and self.email.text.count("@") == 1 and self.email.text.count(".") > 0:
            if self.password != "":
                db.add_user(self.email.text, self.password.text, self.namee.text)

                self.reset()

                sm.current = "login"
            else:
                invalidForm()
        else:
            invalidForm()

    def login(self):
        self.reset()
        sm.current = "login"

    def reset(self):
        self.email.text = ""
        self.password.text = ""
        self.namee.text = ""


class LoginWindow(Screen):
    email = ObjectProperty(None)
    password = ObjectProperty(None)

    def loginBtn(self):
        if db.validate(self.email.text, self.password.text):
            MainWindow.current = self.email.text
            self.reset()
            sm.current = "main"
        else:
            invalidLogin()

    def createBtn(self):
        self.reset()
        sm.current = "create"

    def reset(self):
        self.email.text = ""
        self.password.text = ""


class MainWindow(Screen):
    n = ObjectProperty(None)
    created = ObjectProperty(None)
    email = ObjectProperty(None)
    current = ""

    def logOut(self):
        sm.current = "login"

    def on_enter(self, *args):
        password, name, created = db.get_user(self.current)
        self.n.text = "Account Name: " + name
        self.email.text = "Email: " + self.current
        self.created.text = "Created On: " + created


class WindowManager(ScreenManager):
    pass


def invalidLogin():
    pop = Popup(title='Invalid Login',
                  content=Label(text='Invalid username or password.'),
                  size_hint=(None, None), size=(400, 400))
    pop.open()


def invalidForm():
    pop = Popup(title='Invalid Form',
                  content=Label(text='Please fill in all inputs with valid information.'),
                  size_hint=(None, None), size=(400, 400))

    pop.open()


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

sm = WindowManager()
db = DataBase("users.txt")

screens = [LoginWindow(name="login"), CreateAccountWindow(name="create"),MainWindow(name="main")]
for screen in screens:
    sm.add_widget(screen)

sm.current = "login"


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


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

Answer 1

正如cmets中人所说，原因是终端使用的Python环境不包含模块。

解决方法：请在VS Code左下角选择安装模块“kivy”的Python环境，使用快捷键Ctrl+Shift+`打开一个新的VS Code终端，会自动进入选中的环境。

检查：我们可以使用命令“pip --version”或“python --version”来检查终端使用的是哪个Python以及模块安装在这个位置：

参考：Python environment in VS Code。

Answer 2

您只需要选择安装 kivy 所用的正确 python 版本。 如下图所示，单击底部以选择右侧。 Change python interpreter