Python 属性错误：'；按钮'；对象没有属性

在使用Filechooser选择目录后，我尝试将一个函数（in.py）绑定到按钮（in kv.），如下所示：

.py：

.kv（按钮块）：

看起来像这样：

按下“.csv”后，我得到一个错误

AttributeError:“Button”对象没有属性“output\u csv”

我知道上面描述过类似的问题，但是所有的例子都是用Python语言编写的，而我的问题似乎更多的是关于Kivy语言

如果有任何建议，我将不胜感激

完全错误回溯：

File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\runpy.py", line 193, in _run_module_as_main
  "__main__", mod_spec)
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\runpy.py", line 85, in _run_code
  exec(code, run_globals)
File "C:\GUI Projects\gercort\main.py", line 147, in <module>
  Gercort().run()
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\app.py", line 855, in run
  runTouchApp()
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\base.py", line 504, in runTouchApp
  EventLoop.window.mainloop()
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\core\window\window_sdl2.py", line 747, in mainloop
  self._mainloop()
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\core\window\window_sdl2.py", line 479, in _mainloop
  EventLoop.idle()
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\base.py", line 342, in idle
  self.dispatch_input()
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\base.py", line 327, in dispatch_input
  post_dispatch_input(*pop(0))
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\base.py", line 293, in post_dispatch_input
  wid.dispatch('on_touch_up', me)
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\_event.cp37-win32.pyd", line 707, in kivy._event.EventDispatcher.dispatch
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\uix\behaviors\button.py", line 179, in on_touch_up
  self.dispatch('on_release')
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\_event.cp37-win32.pyd", line 703, in kivy._event.EventDispatcher.dispatch
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\_event.cp37-win32.pyd", line 1214, in kivy._event.EventObservers.dispatch
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\_event.cp37-win32.pyd", line 1098, in kivy._event.EventObservers._dispatch
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\lang\builder.py", line 64, in custom_callback
  exec(__kvlang__.co_value, idmap)
File "C:\GUI Projects\gercort\gercort.kv", line 489, in <module>
  on_release: self.output_csv(self.filepath2)
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\weakproxy.cp37-win32.pyd", line 32, in kivy.weakproxy.WeakProxy.__getattr__

builtins.AttributeError: 'Button' object has no attribute 'output_csv'

文件“C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\runpy.py”，第193行，在主运行模块中
“\uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu
文件“C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\runpy.py”，第85行，在运行代码中
exec（代码、运行\全局）
文件“C:\GUI Projects\gercort\main.py”，第147行，在
Gercort（）.run（）
文件“C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site packages\kivy\app.py”，第855行，正在运行
runTouchApp（）
runTouchApp中第504行的文件“C:\Users\gavrk\AppData\Local\Programs\Python37-32\Lib\site packages\kivy\base.py”
EventLoop.window.mainloop（）
文件“C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site packages\kivy\core\window\window\u sdl2.py”，第747行，在mainloop中
self._mainloop（）
文件“C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site packages\kivy\core\window\window\u sdl2.py”，第479行，在mainloop中
EventLoop.idle（）
文件“C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site packages\kivy\base.py”，第342行，处于空闲状态
self.dispatch_input（）
文件“C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site packages\kivy\base.py”，第327行，在dispatch\u输入中
发送后输入（*pop（0））
文件“C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site packages\kivy\base.py”，第293行，在post\u dispatch\u输入中
wid.dispatch（'我在润色时）
文件“C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site packages\kivy\\u event.cp37-win32.pyd”，第707行，kivy.\u event.EventDispatcher.dispatch
文件“C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site packages\kivy\uix\behaviors\button.py”，第179行，在on\u touch\u中
自我分派（“发布时”）
文件“C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site packages\kivy\\u event.cp37-win32.pyd”，第703行，kivy.\u event.EventDispatcher.dispatch
文件“C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site packages\kivy\\u event.cp37-win32.pyd”，第1214行，在kivy.\u event.eventobsers.dispatch中
文件“C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site packages\kivy\\u event.cp37-win32.pyd”，第1098行，kivy.\u event.eventobsers.\u
文件“C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site packages\kivy\lang\builder.py”，第64行，在自定义回调中
exec（\uuuukVLANG\uuuuuuu.co\u值，idmap）
文件“C:\GUI Projects\gercort\gercort.kv”，第489行，在
发布时：self.output\u csv（self.filepath2）
文件“C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site packages\kivy\weakproxy.cp37-win32.pyd”，第32行，位于kivy.weakproxy.weakproxy.\uu getattr__
builtins.AttributeError:“Button”对象没有“output\u csv”属性

self意味着您正在从Button类调用函数，并且并没有名为output_csv的函数，所以错误告诉您这一点。您在SyllWindow类中定义了该函数。如果该按钮也在该屏幕上，只需将其更改为

on_release: root.output_csv(root.filepath)

---

请将完整的错误回溯添加到您的问题。@KlausD.Added full trackback to the descriptionies，按钮位于.kv的

@Gavrk哪里定义了filepath2变量？@Gavrk尝试使用root而不是self，我更改了答案，请再次检查。@Gavrk在SyllWindow类中使用self.filepath代替“filepath”名称。但不要更改kv文件。@Gavrk这是因为按钮，请添加到函数名*args，这样会像：def output\u csv（corpus\u root，*args）

File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\runpy.py", line 193, in _run_module_as_main
  "__main__", mod_spec)
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\runpy.py", line 85, in _run_code
  exec(code, run_globals)
File "C:\GUI Projects\gercort\main.py", line 147, in <module>
  Gercort().run()
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\app.py", line 855, in run
  runTouchApp()
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\base.py", line 504, in runTouchApp
  EventLoop.window.mainloop()
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\core\window\window_sdl2.py", line 747, in mainloop
  self._mainloop()
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\core\window\window_sdl2.py", line 479, in _mainloop
  EventLoop.idle()
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\base.py", line 342, in idle
  self.dispatch_input()
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\base.py", line 327, in dispatch_input
  post_dispatch_input(*pop(0))
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\base.py", line 293, in post_dispatch_input
  wid.dispatch('on_touch_up', me)
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\_event.cp37-win32.pyd", line 707, in kivy._event.EventDispatcher.dispatch
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\uix\behaviors\button.py", line 179, in on_touch_up
  self.dispatch('on_release')
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\_event.cp37-win32.pyd", line 703, in kivy._event.EventDispatcher.dispatch
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\_event.cp37-win32.pyd", line 1214, in kivy._event.EventObservers.dispatch
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\_event.cp37-win32.pyd", line 1098, in kivy._event.EventObservers._dispatch
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\lang\builder.py", line 64, in custom_callback
  exec(__kvlang__.co_value, idmap)
File "C:\GUI Projects\gercort\gercort.kv", line 489, in <module>
  on_release: self.output_csv(self.filepath2)
File "C:\Users\gavrk\AppData\Local\Programs\Python\Python37-32\Lib\site-packages\kivy\weakproxy.cp37-win32.pyd", line 32, in kivy.weakproxy.WeakProxy.__getattr__

builtins.AttributeError: 'Button' object has no attribute 'output_csv'

on_release: self.output_csv(self.filepath2)

on_release: root.output_csv(root.filepath)