TypeError: int() 参数必须是字符串、类似字节的 object 或数字，而不是“TextInput”

Question

我正在开发一个 Kivy 密码生成器。 用户需要在应用程序中输入一个数字（数字）以生成密码，具体取决于预期的字符数。 然后，应用程序会从 randint 中生成一个随机字符，最后，output 将显示到 output 条目中，以便复制到点击板。 以下是我的代码：

密码生成器.py

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.widget import Widget
from kivy.core.window import Window

from random  import randint


Builder.load_file('password_generator.kv')

Window.size = (350, 600)

class MainApp(App):
    title='Password Generator'
    def build(self):
        Window.clearcolor = (255/255, 255/255, 0, 1) 
        return Mylayout()  

    def password(self):
  
        self.root.ids.output_entry = ''

        pw_length = int(self.root.ids.input_entry)
       
        my_password = ''

        for x in range(pw_length):
            my_password += chr(randint(33, 126))

        self.root.ids.output_entry = my_password

  
    def clip_board(self):
        self.root.clipboard_clear()

        self.root.clipboard_append(self.root.ids.output_entry)

    def delete(self):
        self.root.ids.input_entry = ''
        self.root.ids.output_entry = ''
    
class Mylayout(Widget):    
    pass
       

if __name__ == '__main__':
    MainApp().run()

密码生成器.kv

#:import Factory kivy.factory.Factory

<MyLayout>
              
    FloatLayout:
        
        Label:
            id: label_frame
            text: 'How Many Characters?'
            pos_hint: {'x': .8, 'y':5}
            size_hint: (2, .4)
            color: (0, 0, 0, 1)
            font_size: 24

       
        TextInput:
            id: input_entry
            text: ''
            multiline: False
            font_family: 'Helvatica' 
            font_size: 24
            pos_hint: {'x': .8, 'y':4.5}
            size_hint: (2, .4)
            halign: "center"
            focus: True
            color: 'black'

        Button:
            text:'Generate A Strong Password'
            on_press: app.password()
            pos_hint: {'x': .8, 'y':3.8}
            size_hint: (2, .4)
            font_size: 15

        TextInput:
            id: output_entry
            text: ''
            multiline: False
            font_family: 'Helvatica' 
            font_size: 24
            pos_hint: {'x': .8, 'y':3}
            size_hint: (2, .4)
            halign: "center"
            focus: True
            color: 'black'
            background_color : (255/255, 255/255, 0, 1) 
            #foreground_color:  self.background_color
            color : 'black'

        Button:
            text : 'Copy To Clickboard'
            on_release: Factory.MyPopup().open(),
            on_press: app.clip_board()
            pos_hint: {'x': .8, 'y':2.5}
            size_hint: (2, .4)
            font_size: 15
       
        Button:
            text : "Reset"
            on_press : app.delete()
            pos_hint: {'x': .8, 'y':1.5}
            size_hint: (2, .4)
            font_size: 15

<MyPopup@Popup>
    # auto_dismiss: False
    auto_dismiss: True
    size_hint: 0.6, 0.2
    pos_hint: {'x':0.2, 'top':0.6} 

    title: "Message Informed"

    BoxLayout 
        orientation: "vertical"
        size: root.width, root.height
        Label:
            text: "Password Copied!"
            font_size: 15
        Button: 
            text: "Close!"
            font_size: 15
            on_release: root.dismiss()

当我点击 Generate Strong Password 按钮并要求 output 在 output 条目中输入一个随机密码字符时，出现了以下错误：

Traceback (most recent call last):
   File "c:\Users\Kelvin Loh\Documents\kivyMD\password_generator.py", line 53, in <module>
     MainApp().run()
   File "C:\Users\Kelvin Loh\Documents\kivyMD\kivy_venv\lib\site-packages\kivy\app.py", line 950, in run
     runTouchApp()
   File "C:\Users\Kelvin Loh\Documents\kivyMD\kivy_venv\lib\site-packages\kivy\base.py", line 582, in runTouchApp
     EventLoop.mainloop()
   File "C:\Users\Kelvin Loh\Documents\kivyMD\kivy_venv\lib\site-packages\kivy\base.py", line 347, in mainloop
     self.idle()
   File "C:\Users\Kelvin Loh\Documents\kivyMD\kivy_venv\lib\site-packages\kivy\base.py", line 391, in idle
     self.dispatch_input()
   File "C:\Users\Kelvin Loh\Documents\kivyMD\kivy_venv\lib\site-packages\kivy\base.py", line 342, in dispatch_input
     post_dispatch_input(*pop(0))
   File "C:\Users\Kelvin Loh\Documents\kivyMD\kivy_venv\lib\site-packages\kivy\base.py", line 248, in post_dispatch_input
     listener.dispatch('on_motion', etype, me)
   File "kivy\_event.pyx", line 709, in kivy._event.EventDispatcher.dispatch
   File "C:\Users\Kelvin Loh\Documents\kivyMD\kivy_venv\lib\site-packages\kivy\core\window\__init__.py", line 1412, in on_motion        
     self.dispatch('on_touch_down', me)
   File "kivy\_event.pyx", line 709, in kivy._event.EventDispatcher.dispatch
   File "C:\Users\Kelvin Loh\Documents\kivyMD\kivy_venv\lib\site-packages\kivy\core\window\__init__.py", line 1428, in on_touch_down    
     if w.dispatch('on_touch_down', touch):
   File "kivy\_event.pyx", line 709, in kivy._event.EventDispatcher.dispatch
   File "C:\Users\Kelvin Loh\Documents\kivyMD\kivy_venv\lib\site-packages\kivy\uix\widget.py", line 545, in on_touch_down
     if child.dispatch('on_touch_down', touch):
   File "kivy\_event.pyx", line 709, in kivy._event.EventDispatcher.dispatch
   File "C:\Users\Kelvin Loh\Documents\kivyMD\kivy_venv\lib\site-packages\kivy\uix\widget.py", line 545, in on_touch_down
     if child.dispatch('on_touch_down', touch):
   File "kivy\_event.pyx", line 709, in kivy._event.EventDispatcher.dispatch
   File "C:\Users\Kelvin Loh\Documents\kivyMD\kivy_venv\lib\site-packages\kivy\uix\behaviors\button.py", line 151, in on_touch_down     
     self.dispatch('on_press')
   File "kivy\_event.pyx", line 705, in kivy._event.EventDispatcher.dispatch
   File "kivy\_event.pyx", line 1248, in kivy._event.EventObservers.dispatch
   File "kivy\_event.pyx", line 1132, in kivy._event.EventObservers._dispatch
   File "C:\Users\Kelvin Loh\Documents\kivyMD\kivy_venv\lib\site-packages\kivy\lang\builder.py", line 57, in custom_callback
     exec(__kvlang__.co_value, idmap)
   File "C:\Users\Kelvin Loh\Documents\kivyMD\password_generator.kv", line 30, in <module>
     on_press: app.password()
   File "c:\Users\Kelvin Loh\Documents\kivyMD\password_generator.py", line 24, in password
     pw_length = int(self.root.ids.input_entry)
   File "kivy\weakproxy.pyx", line 254, in kivy.weakproxy.WeakProxy.__int__
 TypeError: int() argument must be a string, a bytes-like object or a number, not 'TextInput'

如何解决？

Answer 1

尝试将password() function 中的 pw_length 更改为：

pw_length = int(self.root.ids.input_entry.text or 0)

input_entry 是无法转换为 int 的 TextInput。 我认为您想将其值 ( input_entry.text ) 转换为 int，而不是小部件本身。 为此，如上更改password()方法中的pw_length =...行。

Answer 2

当您使用类似self.root.ids.some_name （或self.ids.some_name ）的东西时，您应该从root （或某个类）访问命名（ some_name ）小部件的弱引用。

现在得到一个attr。 该代理小部件的您可以像往常一样使用“。” go。 语法即self.root.ids.some_name.prop （或self.ids.some_name.prop ）。

这里， self.root.ids.output_entry是一个TextInput实例。 因此，要访问它的任何属性，您可以执行类似self.root.ids.output_entry.prop_name的操作。 有了这个，我修改了password方法，

    def password(self):
  
        self.root.ids.output_entry.text = ''
        
        input_text = self.root.ids.input_entry.text
        
        # Bellow you will handle user-input. You can use try-except or if-else or whatever that suits. I just implement a simple one.
        if input_text: # Means non-empty string.
            pw_length = int(input_text)
        else: # Raise Error or warn user via a message.
            pw_length = 0
            
       
        my_password = ''

        for x in range(pw_length):
            my_password += chr(randint(33, 126))

        self.root.ids.output_entry.text = my_password

不要忘记在必要时应用所需的更改（如上所述）。

Answer 3

首先，必须通过添加input_filter: "int"将文本字段限制为仅支持整数

TextInput:
    id: input_entry
    text: ''
    multiline: False
    font_family: 'Helvatica' 
    font_size: 24
    pos_hint: {'x': .8, 'y':4.5}
    size_hint: (2, .4)
    halign: "center"
    focus: True
    color: 'black'
    input_filter: "int"