python - 无法访问我的 kivy 类中的对象，无法使用“app.root”和“self.ids”

Question

我想调用一个函数，但该函数有两个参数，没有参数就无法调用该函数，导致 python 显示有关两个缺少参数的错误。我通常使用 'app.root' 'self.ids' 访问我的对象，在这种情况下，由于某些原因我不能使用这些对象。我想调用 'MyFirebase().sign_up(email=, password=)' 但我需要将它与我的 kivy 类中的对象相等。如果有人知道如何访问这些对象，我试图与之相等的对象存储在“app.root.ids.signup.ids.email.text”和“approot.ids.signup.ids.password.text”中我将不胜感激。这是我的代码的最小可重现示例，我试图将函数归入“thefirebase = MyFirebase()”</p>

from kivy.app import App
import requests
import json

class MyFireBase():

    def __init__(self):
        # initialize localId to None, just to be sure it always exists
        self.localId = None


    def sign_up(self, email, password):

            app = App.get_running_app()
            email = email.replace("\n","")
            password = password.replace("\n","")

            # Send email and password to Firebase
            # Firebase will return localId, authToken (idToken), refreshToken
            signup_url = "https://www.googleapis.com/identitytoolkit/v3/relyingparty/signupNewUser?key=" + self.wak
            signup_payload = {"email": email, "password": password, "returnSecureToken": True}
            sign_up_request = requests.post(signup_url, data=signup_payload)
            sign_up_data = json.loads(sign_up_request.content.decode())
            print(sign_up_request.ok)
            print(sign_up_request.content.decode())


            if sign_up_request.ok == True:
                print(sign_up_data)
                refresh_token = sign_up_data['refreshToken']

                self.localId = sign_up_data['localId']
                idToken = sign_up_data['idToken']

                # Save refreshToken to a file
                with open(app.refresh_token_file, "w") as f:
                    f.write(refresh_token)


                app.local_id = self.localId
                app.id_token = idToken




                my_data =  '{"avatar": "profilepic.png", "jobs_done": "", "jobs_posted": ""}'
                post_request = requests.patch("https://moonlighting-bb8ab.firebaseio.com/users/" + self.localId + ".json?auth=" + idToken, data=my_data)
                print(post_request.ok)
                print(post_request.content.decode())

                app.root.current = "create"



            elif sign_up_request.ok == False:

                error_data = json.loads(sign_up_request.content.decode())
                error_message = error_data["error"]['message']
                app.root.ids.signup.ids.signup_message.text = error_message.replace("_", " ")

    def send_user_details(self):
        app = App.get_running_app()
        my_data ={"first name": app.root.ids.create.ids.first_name.text, "last name": app.root.ids.create.ids.last_name.text,
                   "phone number": app.root.ids.create.ids.phone_number.text, "job1": app.root.ids.create.ids.job1.text, "job2": app.root.ids.create.ids.job2.text,
                   "job3": app.root.ids.create.ids.job3.text, "date of birth": app.root.ids.create.ids.date_of_birth.text, "state": app.root.ids.create.ids.state1.text}

        user_details = requests.patch("https://moonlighting-bb8ab.firebaseio.com/users/" + app.local_id + ".json?auth=" + app.id_token,  json.dumps(my_data))
        print(user_details.ok)
        print(user_details.content.decode())

        app.root.current = "main"




    def sign_in_existing_user(self, email, password):
        signin_url = "https://www.googleapis.com/identitytoolkit/v3/relyingparty/verifyPassword?key=" + self.wak
        signin_payload = {"email": email, "password": password, "returnSecureToken": True}
        signin_request = requests.post(signin_url, data=signin_payload)
        sign_up_data = json.loads(signin_request.content.decode())
        app = App.get_running_app()
        print(signin_request.ok)
        print(signin_request.content.decode())

        if signin_request.ok == True:
            refresh_token = sign_up_data['refreshToken']

            self.localId = sign_up_data['localId']
            idToken = sign_up_data['idToken']
            # Save refreshToken to a file
            with open(app.refresh_token_file, "w") as f:
                f.write(refresh_token)

            # Save localId to a variable in main app class
            # Save idToken to a variable in main app class
            app.local_id = self.localId
            app.id_token = idToken
            # Create new key in database from localId
            # Get friend ID
            # Get request on firebase to get the next friend id
            # --- User exists so i dont need to get a friend id
            # self.friend_get_req = UrlRequest("https://friendly-fitness.firebaseio.com/next_friend_id.json?auth=" + idToken, on_success=self.on_friend_get_req_ok)
            # app.change_screen("home_screen")

            app.root.current = "main"


        elif signin_request.ok == False:
            error_data = json.loads(signin_request.content.decode())
            error_message = error_data["error"]['message']
            app.root.ids.login.ids.login_message.text = error_message.replace("_", " ")


class Server():

    def __init__(self, thefirebase, *args, **kwargs):
        super().__init__(*args, **kwargs)
        app = App.get_running_app()

        self.thefirebase = thefirebase  # Store the initialised MyFireBase instance

app = App.get_running_app()
thefirebase = MyFireBase()
thefirebase.sign_up(email= app.root.ids.signup.ids.email.text, password=app.root.ids.signup.ids.password.text)

class MyApp(App):
    refresh_token_file = "refresh_token.txt"
    members_list = "members_list.txt"
    thefirebase = MyFireBase()



    def build(self):
        app = App.get_running_app()
        self.thefirebase = MyFireBase()
        self.refresh_token_file = app.user_data_dir + self.refresh_token_file
        return sm

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

标签： pythonkivy

Answer 1

你的代码：

app = App.get_running_app()
thefirebase = MyFireBase()
thefirebase.sign_up(email= app.root.ids.signup.ids.email.text, password=app.root.ids.signup.ids.password.text)

running_app将失败，因为它在运行应用程序之前尝试访问。这些行应该被删除。

在您的build()方法中，您再次调用App.get_running_app()，但在这种情况下，Appis self。所以你也不需要在那里调用它。

由于您需要调用引用ids，因此您必须延迟调用，直到App构建显示（当ids字典被填充时）。我建议将您的App课程更改为：

class MyApp(App):
    refresh_token_file = "refresh_token.txt"
    members_list = "members_list.txt"
    # thefirebase = MyFireBase() # not needed. it is defined in the build()

    def build(self):
        self.thefirebase = MyFireBase()
        self.refresh_token_file = self.user_data_dir + self.refresh_token_file

        # delay your call to sign_up() until the App is built
        Clock.schedule_once(self.call_signup)

        return sm

    def call_signup(self, dt):
        # now make the desired call to sign_up()
        self.thefirebase.sign_up(email=self.root.ids.signup.ids.email.text, password=self.root.ids.signup.ids.password.text)

顺便说一句，您没有提供最小的可重现示例，因为您没有提供kv包含id定义的文件。所以我无法测试我的答案。