GUI编程

Question

当我运行我的GUI程序时，我会得到一个错误，在automotive = Automotive()中，第63行中，有一个属性错误，它说Automotive没有属性'show_choice‘。但在我的程序下面，这是明确的说明。为什么要这样说，我怎样才能解决这个问题？

下面是我到目前为止使用的GUI程序(在这里我遇到了麻烦)：

def show_choice(self):
    self.message = 'You selected:\n'

    if self.cb_var1.get() == 1:
        self.message = self.message + '1\n'
    if self.cb_var2.get() == 1:
        self.message = self.message + '2\n'
    if self.cb_var3.get() == 1:
        self.message = self.message + '3\n'
    if self.cb_var4.get() == 1:
        self.message = self.message + '4\n'
    if self.cb_var5.get() == 1:
        self.message = self.message + '5\n'
    if self.cb_var6.get() == 1:
        self.message = self.message + '6\n'
    if self.cb_var7.get() == 1:
        self.message = self.message + '7\n'

#Display the message in the info box.

        tkinter.messagebox.showinfo('Selection', self.message)

#Create an instance for My Gui class.

automotive = Automotive()

Answer 1

您的方法很可能过于缩进，即：

class Automotive():
    def __init__(self):
        ....
        def show_choice(self):
            self.message = 'You selected:\n'

            if self.cb_var1.get() == 1:
                self.message = self.message + '1\n'
            if self.cb_var2.get() == 1:
                self.message = self.message + '2\n'
            if self.cb_var3.get() == 1:
                self.message = self.message + '3\n'
            if self.cb_var4.get() == 1:
                self.message = self.message + '4\n'
            if self.cb_var5.get() == 1:
                self.message = self.message + '5\n'
            if self.cb_var6.get() == 1:
                self.message = self.message + '6\n'
            if self.cb_var7.get() == 1:
                self.message = self.message + '7\n'

或者：

class Automotive():
    def __init__(self):
        ....
def show_choice(self):
    self.message = 'You selected:\n'

    if self.cb_var1.get() == 1:
        self.message = self.message + '1\n'
    if self.cb_var2.get() == 1:
        self.message = self.message + '2\n'
    if self.cb_var3.get() == 1:
        self.message = self.message + '3\n'
    if self.cb_var4.get() == 1:
        self.message = self.message + '4\n'
    if self.cb_var5.get() == 1:
        self.message = self.message + '5\n'
    if self.cb_var6.get() == 1:
        self.message = self.message + '6\n'
    if self.cb_var7.get() == 1:
        self.message = self.message + '7\n'

def应该与init位于相同的缩进位置：

class Automotive():
    def __init__(self):
        ....
    def show_choice(self):
        self.message = 'You selected:\n'

        if self.cb_var1.get() == 1:
            self.message = self.message + '1\n'
        if self.cb_var2.get() == 1:
            self.message = self.message + '2\n'
        if self.cb_var3.get() == 1:
            self.message = self.message + '3\n'
        if self.cb_var4.get() == 1:
            self.message = self.message + '4\n'
        if self.cb_var5.get() == 1:
            self.message = self.message + '5\n'
        if self.cb_var6.get() == 1:
            self.message = self.message + '6\n'
        if self.cb_var7.get() == 1:
            self.message = self.message + '7\n'