我尝试了这个关于MDDataTable的简单代码,但每次执行它时,它总是给我错误。最近我成功地运行了不同的KivyMD函数,但这个简单的表让我头疼
Python代码
from kivymd.app import MDApp
from kivymd.uix.screen import Screen
from kivymd.uix.datatables import MDDataTable
from kivy.metrics import dp
class Demo(MDApp):
def build(self):
screen = Screen()
table = MDDataTable(orientation = "lr-tb",
column_data = [
("Food",dp(30)),
("Calories", dp(30))
])
screen.add_widget(table)
return screen
Demo().run()
错误
Traceback (most recent call last):
File "C:/Users/User/PycharmProjects/purbar/dataTabols.py", line 16, in <module>
Demo().run()
File "C:\Users\User\PycharmProjects\purbar\venv\lib\site-packages\kivy\app.py", line 949, in run
self._run_prepare()
File "C:\Users\User\PycharmProjects\purbar\venv\lib\site-packages\kivy\app.py", line 919, in _run_prepare
root = self.build()
File "C:/Users/User/PycharmProjects/purbar/dataTabols.py", line 9, in build
table = MDDataTable(orientation = "lr-tb",
File "C:\Users\User\PycharmProjects\purbar\venv\lib\site-packages\kivymd\uix\datatables.py", line 923, in __init__
super().__init__(**kwargs)
File "C:\Users\User\PycharmProjects\purbar\venv\lib\site-packages\kivymd\theming.py", line 907, in __init__
super().__init__(**kwargs)
File "C:\Users\User\PycharmProjects\purbar\venv\lib\site-packages\kivy\uix\modalview.py", line 187, in __init__
super(ModalView, self).__init__(**kwargs)
File "C:\Users\User\PycharmProjects\purbar\venv\lib\site-packages\kivy\uix\anchorlayout.py", line 68, in __init__
super(AnchorLayout, self).__init__(**kwargs)
File "C:\Users\User\PycharmProjects\purbar\venv\lib\site-packages\kivy\uix\layout.py", line 76, in __init__
super(Layout, self).__init__(**kwargs)
File "C:\Users\User\PycharmProjects\purbar\venv\lib\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)
我也有同样的问题。删除
orientation='tb-lr'
会抛出一个ValueError
(see here),但包括它会产生与您经历的相同的TypeError
到目前为止,我可以通过从源代码(即从https://github.com/kivymd/KivyMD)安装KivyMD来解决这个问题,如下所示:
我也遇到了同样的问题,并找到了这个链接:Unable to find TableRecycleGridLayout to fix Kivy code,这是(我想)您避免“垂直”错误消息的解决方案。 它对我不起作用,所以我从kivymd.uix.datatables.py中的TableRecycleGridLayout模板中删除了一对“方向:垂直”,解决了这个问题。这可能是kivimd的错误
每当遇到错误时:
它告诉您,类
object
的__init__()
方法正在使用意外参数调用。object
类是所有python类的基类(请参见documentation)。在python中,当您创建某个类的新实例时,它的__init__()
方法将使用您提供的任何参数进行调用。普通的__init__()
将获取它识别的关键字参数,并将任何剩余的关键字参数传递给它的基类。这将一直持续到object
类的__init__()
最终被调用为止。object
的__init__()
方法不接受任何参数,因此存在于object
类__init__()
的任何关键字参数都将抛出您看到的错误。如果为无法识别的__init__()
方法提供关键字参数,则会发生这种情况。在您的例子中,无法识别的参数是orientation
。MDDataTable
类不将orientation
识别为关键字参数,因此它会一直传递到object
类,并抛出错误TLDR:只需删除
orientation = "lr-tb"
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