问kivymd object.init()只带一个参数(要初始化的实例)
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Stack Overflow用户

提问于 2020-09-19 08:48:35

回答 1查看 707关注 0票数 0

我正在尝试构建一个youtube视频下载程序，但是我被困住了，并且犯了一个奇怪的错误，我不知道怎么做？我认为我的代码看起来不错，但有些地方不对劲，我会尝试，但我无法弄清楚！

请帮帮我-

误差

    Traceback (most recent call last):
   File "/home/rohit/Desktop/Youtube_downloader/main.py", line 84, in <module>
     Itube().run()
   File "/home/rohit/Desktop/Youtube_downloader/main.py", line 38, in __init__
     self.file_manager = MDFileManager(
   File "/home/rohit/Desktop/Youtube_downloader/env/lib/python3.8/site-packages/kivymd/uix/filemanager.py", line 403, in __init__
     super().__init__(**kwargs)
   File "/home/rohit/Desktop/Youtube_downloader/env/lib/python3.8/site-packages/kivymd/theming.py", line 907, in __init__
     super().__init__(**kwargs)
   File "/home/rohit/Desktop/Youtube_downloader/env/lib/python3.8/site-packages/kivy/uix/floatlayout.py", line 65, in __init__
     super(FloatLayout, self).__init__(**kwargs)
   File "/home/rohit/Desktop/Youtube_downloader/env/lib/python3.8/site-packages/kivy/uix/layout.py", line 76, in __init__
     super(Layout, self).__init__(**kwargs)
   File "/home/rohit/Desktop/Youtube_downloader/env/lib/python3.8/site-packages/kivymd/uix/behaviors/backgroundcolorbehavior.py", line 150, in __init__
     super().__init__(**kwargs)
   File "/home/rohit/Desktop/Youtube_downloader/env/lib/python3.8/site-packages/kivy/uix/widget.py", line 350, in __init__
     super(Widget, self).__init__(**kwargs)
   File "kivy/_event.pyx", line 245, in kivy._event.EventDispatcher.__init__
 TypeError: object.__init__() takes exactly one argument (the instance to initialize)

main.py

from kivymd.app import MDApp
from kivy.lang import Builder
from kivy.uix.screenmanager import Screen, ScreenManager
from kivy.core.window import Window
from kivymd.uix.filemanager import MDFileManager
from kivymd.toast import toast
from youtube_dl import kv


Window.size = (450, 740)



class HomeScreen(Screen):
    pass

class SigninScreen(Screen):
    pass




sm = ScreenManager()
sm.add_widget(HomeScreen(name='homescreen'))
sm.add_widget(SigninScreen(name='signinscreen'))





class Itube(MDApp):
    def __init__(self, **kwargs):
        super().__init__(**kwargs)

        Window.bind(on_keyboard=self.events)

        self.manager_open = False
        self.file_manager = MDFileManager(
            exit_manager = self.exit_manager, 
            self_path = self.select_path,
            preview = True,
        )


    def build(self):
        return Builder.load_string(kv)


    def file_manager_open(self):
        self.file_manager.show('/')  # output manager to the screen
        self.manager_open = True

    def select_path(self, path):
        '''It will be called when you click on the file name
        or the catalog selection button.

        :type path: str;
        :param path: path to the selected directory or file;
        '''

        self.exit_manager()
        toast(path)

    def exit_manager(self, *args):
        '''Called when the user reaches the root of the directory tree.'''

        self.manager_open = False
        self.file_manager.close()

    def events(self, instance, keyboard, keycode, text, modifiers):
        '''Called when buttons are pressed on the mobile device.'''

        if keyboard in (1001, 27):
            if self.manager_open:
                self.file_manager.back()
        return True






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

youtube_dl.py

kv = """

ScreenManager:
    HomeScreen:
    SigninScreen:




<HomeScreen>:
    name: 'homescreen'



    MDBoxLayout:
        orientation: 'vertical'
        spacing: 20
        padding: 40


        MDTextFieldRound:
            hint_text: 'Url'
            multline: False
            normal_color: (1, 1, 1, 100)
            color_active: (232/255, 232/255, 232/255, 600)
            
        MDBoxLayout:
            orientation: 'horizontal'
            adaptive_size: True
            spacing: 22
            pos_hint: {'center_x': 0.5, 'center_y': .99}

            MDToolbar:
                title: 'FileManager'
                left_action_items: [['menu', lambda x: None]]
                elevation: 10

            MDRaisedButton:
                text: 'Import from computer'
                icon: "folder"
                on_release: app.file_manager_open()
            
            MDRaisedButton:
                text: 'Import from itube cloud'
    

    

        


<SigninScreen>:
    name: 'signinscreen'


"""

或者，您能解释一下构建大kivymd应用程序的最佳方法吗？

python

python-3.x

kivy

kivymd

回答 1

Stack Overflow用户

发布于 2020-12-21 06:11:23

在self.file_manager中，您已经编写了self_path = self.select_path。这将是select_path = self.select_path。而且，我不知道preview=True有什么问题，也许是个bug。所以你的职能是：

def __init__(self, **kwargs):
    super().__init__(**kwargs)
    Window.bind(on_keyboard=self.events)
    self.manager_open = False
    self.file_manager = MDFileManager(
        exit_manager = self.exit_manager, 
        select_path = self.select_path,
    )
    self.file_manager.preview = True #Can try if it works