Question

SOOOOO 我还在从上一个问题开始研究那个学校项目，这次是原型，而不是测试。它应该解决方程式。我已经在vanilla Python和TkInter中编写了代码，这是有效的。它也有德国部分。我的奋斗是如何从TextInput到proccesing部分获取字符串并将其输出到LabelLös。所以这是我的代码：

from kivy.app import App
from kivy.uix.gridlayout import GridLayout
from kivy.uix.label import Label
from kivy.uix.textinput import TextInput
from kivy.clock import Clock
from kivy.uix.button import Button

a=42

class übung(GridLayout):
    def __init__(self, **kwargs):
        super(übung, self).__init__(**kwargs)
        self.cols = 3
        self.fill1 = Label(text = "")
        self.label1 = Label(text = "Sagen sie ihre Gleichung")
        self.fill2 = Label(text = "")
        self.links = TextInput(multiline=False)
        self.label2 = Label(text = '=')
        self.rechts = TextInput(multiline=False)
        self.fill3 = Label(text = '')
        self.btn1 = Button(text="Lösen")
        self.btn1.bind(on_press=self.einfach())
        self.fill4 = Label(text = '')
        self.fill5 = Label(text = '')
        self.btn2 = Button(text="Mit Rechenweg lösen")
        self.btn2.bind(on_press=self.einfachS)
        self.fill6 = Label(text = '')
        self.fill7 = Label(text = '')
        self.lös = Label(text = '')
        self.fill8 = Label(text = '')
        self.fill9 = Label(text = '')
        self.rech1 = Label(text = '')
        self.fill10 = Label(text = '')
        self.fill11 = Label(text = '')
        self.rech2 = Label(text = '')
        self.fill12 = Label(text = '')
        self.fill13 = Label(text = '')
        self.rech3 = Label(text = '')
        self.fill14 = Label(text = '')
        self.fill15 = Label(text = '')
        self.rech4 = Label(text = '')


        self.add_widget(self.fill1)
        self.add_widget(self.label1)
        self.add_widget(self.fill2)
        self.add_widget(self.links)
        self.add_widget(self.label2)
        self.add_widget(self.rechts)
        self.add_widget(self.fill3)
        self.add_widget(self.btn1)
        self.add_widget(self.fill6)
        self.add_widget(self.fill7)
        self.add_widget(self.btn2)
        self.add_widget(self.fill8)
        self.add_widget(self.fill9)
        self.add_widget(self.lös)
        self.add_widget(self.fill4)
        self.add_widget(self.fill5)
        self.add_widget(self.rech1)
        self.add_widget(self.fill10)
        self.add_widget(self.fill11)
        self.add_widget(self.rech2)
        self.add_widget(self.fill12)
        self.add_widget(self.fill13)
        self.add_widget(self.rech3)
        self.add_widget(self.fill14)
        self.add_widget(self.fill15)
        self.add_widget(self.rech4)





    def einfach(event, self):
        r = self.rechts.text
        l = self.links.text
        x = 'x'
        if x in l:
            r1,r2 = r.split ('+')                    
            rr = float(r1) + float(r2)
            lr, ll = l.split('x')
            lr = float(lr)
            end = rr/lr
            end = float (end)
            self.lös.text = end
        elif x in r:
            l1,l2 = l.split ('+')                    
            ll = float(l1) + float(l2)
            rl, rr = r.split('x')
            rl = float(rl)
            end = ll/rl
            end = float(end)
            self.lös.text = end



    def einfachS(self, event):
        print ('nein')



class App(App):
     def build(self):
        return übung()


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

如你所见，它非常紧凑，但我认为它只适用于1％左右是的。提前谢谢，我

Answer 1

此：

self.btn1.bind(on_press=self.einfach())

与此完全相同：

result = self.einfach()
self.btn1.bind(on_press=result)

将功能绑定到按钮时，必须为按钮提供可调用。也就是说，函数的引用。相反，您正在调用函数并传入结果。

解决方法是将绑定更改为如下所示（注意缺少()）：

self.btn1.bind(on_press=self.einfach)

此外，您需要更改此内容：

def einfach(event, self):

......对此：

def einfach(self, event):

Kivy缺少1个位置参数（个体经营）

1 个答案: