问TypeError：'classname‘对象不可调用(在通过tkinter.Button.command调用的方法中)
EN

Stack Overflow用户

提问于 2019-07-07 09:23:28

回答 1查看 58关注 0票数 2

我想在单击tkinter.Button时调用对象的方法。

我已经将我的代码简化为下面的代码。当我直接调用函数(newone) (如“newone(‘3’)”)时，一切看起来都很好，但是当单击按钮(调用相同的函数)时，就会得到一个错误。

我看过类似的'typerror: x不是可调用的‘，但我没有发现任何类似于我的代码，我不知道这里出了什么问题。对lot.addone(name)的实际调用似乎有效，因为只有当我想在addone()内实例化一个新对象时才会得到错误。类thing()是否不再可见(因为通过tkinter.button调用它？)我怎样才能让它再次可见？任何帮助都将不胜感激。

    import tkinter

    window = tkinter.Tk()

    def newone(name='four'):
        global lot
        lot.addone(name)

    class thing:
        def __init__(self):
            self.name = 'nothing'

    class list_of_things:
        def __init__(self):
            self.things = dict()

        def addone(self, name):
            self.things[name] = thing()     ## the error location
            self.things[name].name = name


    lot = list_of_things()
    lot.addone('one')   ## something dummy
    lot.addone('two')
    newone('three')     ## this works

    print(lot.things['one'].name)
    print(lot.things['three'].name)   ## prints out correctly

    row_index = 0
    for (key, thing) in lot.things.items():
        tkinter.Label(window, text = thing.name).grid(row = row_index)
        row_index = row_index + 1

    tkinter.Button(window, text = 'New task', command = newone).grid(row = row_index) ## this fails

    window.mainloop()

我得到的错误如下：

Exception in Tkinter callback
Traceback (most recent call last):
  File "D:\tools\Miniconda3\envs\3dot6kivy\lib\tkinter\__init__.py", line 1702, in __call__
    return self.func(*args)
  File "test.py", line 8, in newone
    lot.addone(name)
  File "test.py", line 19, in addone
    self.things[name] = thing()     ## the error location
TypeError: 'thing' object is not callable

python

tkinter

回答 1

Stack Overflow用户

回答已采纳

发布于 2019-07-07 18:28:29

类名thing被名为thing的变量屏蔽。我将类重命名为Thing，它起作用了。

还对下列守则作了其他调整：

import tkinter as tk


class Thing:
    def __init__(self):
        print("adding a 'Thing' object")
        self.name = 'nothing'


class ListOfThings:
    def __init__(self):
        self.things = dict()

    def addone(self, name):
        self.things[name] = Thing()
        self.things[name].name = name


def newone(name='four'):
    lot.addone(name)       # lot doesn't need to be global if you are not assigning to it


if __name__ == '__main__':

    window = tk.Tk()

    lot = ListOfThings()
    lot.addone('one')
    lot.addone('two')
    newone('three')

    print(lot.things['one'].name)
    print(lot.things['three'].name)

    row_index = 0
    for (key, thing) in lot.things.items():
        tk.Label(window, text=thing.name).grid(row=row_index)
        row_index = row_index + 1

    tk.Button(window, text='New task', command=newone).grid(row=row_index)

    window.mainloop()