TypeError: int() 參數必須是字符串、類似字節的 object 或數字，而不是“TextInput”

Question

我正在開發一個 Kivy 密碼生成器。 用戶需要在應用程序中輸入一個數字（數字）以生成密碼，具體取決於預期的字符數。 然后，應用程序會從 randint 中生成一個隨機字符，最后，output 將顯示到 output 條目中，以便復制到點擊板。 以下是我的代碼：

密碼生成器.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()

密碼生成器.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()

當我點擊 Generate Strong Password 按鈕並要求 output 在 output 條目中輸入一個隨機密碼字符時，出現了以下錯誤：

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'

如何解決？

Answer 1

嘗試將password() function 中的 pw_length 更改為：

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

input_entry 是無法轉換為 int 的 TextInput。 我認為您想將其值 ( input_entry.text ) 轉換為 int，而不是小部件本身。 為此，如上更改password()方法中的pw_length =...行。

Answer 2

當您使用類似self.root.ids.some_name （或self.ids.some_name ）的東西時，您應該從root （或某個類）訪問命名（ some_name ）小部件的弱引用。

現在得到一個attr。 該代理小部件的您可以像往常一樣使用“。” go。 語法即self.root.ids.some_name.prop （或self.ids.some_name.prop ）。

這里， self.root.ids.output_entry是一個TextInput實例。 因此，要訪問它的任何屬性，您可以執行類似self.root.ids.output_entry.prop_name的操作。 有了這個，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

不要忘記在必要時應用所需的更改（如上所述）。

Answer 3

首先，必須通過添加input_filter: "int"將文本字段限制為僅支持整數

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"