我用 Python 做了一个简单的计算器 kivy 程序。 但是出现了一个arror，我不明白它想说什么

Question

This is the code -

import kivy
from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.widget import Widget
from kivy.uix.button import Button
from kivy.uix.gridlayout import GridLayout
from kivy.uix.textinput import TextInput



class mygl(GridLayout):
    def __init__(self, **kwargs):
        super(mygl, self).__init__(**kwargs)
        self.cols = 2
        self.add_widget(Label(text = "input calculation :", font_size = 40))
        self.calc = TextInput(Multiline = False)
        self.add_widget(self.calc)
        self.sub = Button(text = "Submit")
        self.add_widget(self.sub)
        self.sub.bind(in_press = self.press())

    def press(self, instance):
        a = self.calc.text
        b = a.split(" ")
        if b[1] == "+":
            self.add_widget(Label(text = b[0] + b[2]))
        elif b[1] == "-":
            self.add_widget(Label(text = b[0] - b[2]))
        elif b[1] == "X":
            self.add_widget(Label(text = b[0] * b[2]))


class calculator(App):
    def build(self):
        return mygl()

calculator().run()

this is the error -

Traceback (most recent call last): File "c:\Users\Vinay Mohnot\OneDrive\Desktop\Aditya Coding VS code\no.py", line 37, in calculator().run() File "C:\Users\Vinay Mohnot\AppData\Local\Programs\Python\Python39\lib\site-packages\kivy\app.py", line 949, in run self._run_prepare() File "C:\Users\Vinay Mohnot\AppData\Local\Programs\Python\Python39\lib\site-packages\kivy\app.py", line 919, in _run_prepare root = self.build() File "c:\Users\Vinay Mohnot\OneDrive\Desktop\Aditya Coding VS code\no.py", line 35, in build return mygl() File "c:\Users\Vinay Mohnot\OneDrive\Desktop\Aditya Coding VS code\no.py", line 16, in init self.calc = TextInput(Multiline = False) File "C:\Users\Vinay Mohnot\AppData\Local\Programs\Python\Python39\lib\site-packages\kivy\uix\textinput.py", line 528, in init super(TextInput, self). init (**kwargs) File "C:\Users\Vinay Mohnot\AppData\Local\Programs\Python\Python39\lib\site-packages\kivy\uix\behaviors\focus.py", line 367, in init super(FocusBehavior, self). init (**kwargs) File "C:\Users\Vinay Mohnot\AppData\Local\Programs\Python\Python39\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) PS C:\Users\Vinay Mohnot\OneDrive\Desktop\Aditya Coding VS code>

I am a beginner so I don't why this is showing up

Answer 1

I believe the problem is in the line:

self.calc = TextInput(Multiline = False)

the keyword should be multiline (no capitals):

self.calc = TextInput(multiline = False)

Also,

self.sub.bind(in_press = self.press())

should be:

self.sub.bind(in_press = self.press)

without () .