Python 未绑定(bind)方法类型错误

Question

get_pos 方法应该获取用户在条目中输入的内容。当 get_pos 被执行时，它返回:

TypeError: unbound method get_pos() must be called with app instance as first argument (got nothing instead)

代码:

class app(object):
    def __init__(self,root):
        self.functionframe=FunctionFrame(root, self)
            self.functionframe.pack(side=BOTTOM)
    def get_pos(self):
        self.functionframe.input(self)
class FunctionFrame(Frame):
    def __init__(self,master,parent):
        Frame.__init__(self,master,bg="grey90")
        self.entry = Entry(self,width=15)
        self.entry.pack
    def input(self):
        self.input = self.entry.get()
        return self.input

Answer 1

您报告了这个错误:

TypeError: unbound method get_pos() must be called with app instance as first argument (got nothing instead)

通俗地说，这意味着您正在做这样的事情:

class app(object):
    def get_pos(self):
        ...
...
app.get_pos()

你需要做的是这样的:

the_app = app()  # create instance of class 'app'
the_app.get_pos() # call get_pos on the instance

很难得到比这更具体的信息，因为您没有向我们展示导致错误的实际代码。