这里有什么问题？ （属性错误__len__）

Question

import Tkinter 

class buttton(Tkinter.Button): 
    def __init__(self,frame,action=None): 
     if action==None: 
      action=self.action 
     Tkinter.Button.__init__(self,frame,command=action) 
     self.pack(frame) 
    def action(self): 
     None 


root=Tkinter.Tk() 
button=buttton(root) 
root.mainloop() 

一旦运行这个问题，其中我无法找到，我遇到了一个非常奇怪的错误任何问题......

Traceback (most recent call last): 
    File "C:/Users/19CRF01/Desktop/ab.py", line 14, in <module> 
    button=buttton(root) 
    File "C:/Users/19CRF01/Desktop/ab.py", line 8, in __init__ 
    self.pack(frame) 
    File "C:\Python27\lib\lib-tk\Tkinter.py", line 1940, in pack_configure 
    + self._options(cnf, kw)) 
    File "C:\Python27\lib\lib-tk\Tkinter.py", line 1162, in _options 
    cnf = _cnfmerge(cnf) 
    File "C:\Python27\lib\lib-tk\Tkinter.py", line 114, in _cnfmerge 
    for c in _flatten(cnfs): 
    File "C:\Python27\lib\lib-tk\Tkinter.py", line 1898, in __getattr__ 
    return getattr(self.tk, attr) 
AttributeError: __len__ 

我会很乐意为更多任何帮助！

Answer 1

这里是你的问题：

self.pack(frame) 

self.pack并不需要一个框架的说法。删除frame，它应该运行正常，像这样：

self.pack()