Question

我正在用python编写计算器程序，并且我不断收到错误消息 AttributeError: 'Application' object has no attribute 'response_txt'

from tkinter import *




class Application(Frame):
""" GUI application calculator. """ 
def __init__(self, master):
    """ Initialize the frame. """
    super(Application, self).__init__(master)  

    # Adds the grid layout manager
    self.grid()

    # The result string
    self.response_str = ""

    #sets up the controls in the frame
    self.create_widgets()

def create_widgets(self):
    """ Create and sequence """

    #Text Sequence
    self.sequence_txt = Text(self, height = 1, width = 30, wrap=WORD)
    self.sequence_txt.grid(row = 0, column = 0, columnspan = 2)

    # Configure the Text to center
    self.sequence_txt.tag_config("center_align", justify='center')

    # Configure the Text to center
    self.response_txt.tag_config("center_align", justify='center')

    ###buttons
    # Button 1
    Button(self,
           bg='1',
           command = self.one_btn_clicked,
           height = 2
           ).grid(row = 2, column = 0, sticky = NSEW)

#buttons clicked
def one_btn_clicked(self):
    """This method is run when the one button gets clicked"""
    #append a 1
    self.response_str+="1"
    #update text
    self.response_txt.delete(0.0, END)
    self.response_txt.insert(0.0, self.response_str, "center_align")
    #add number
    self.compare_sequences();
#main
root = Tk()
root.title("Calculator")
app = Application(root)
root.mainloop()

当我通过模块运行时，它给了我这个错误：

AttributeError: 'Application' object has no attribute 'response_txt'

我尝试导入这样的子模块：

`import self.response_txt`

然后它给了我这个错误信息：

ImportError: No module named 'self'

我真的需要这个工作，明天到期的学校作业。任何想法都很受欢迎，我对编程很新。我也知道该程序并不是那么接近完成，但在我可以采取任何其他步骤之前，我需要确保我在这里所做的事情将首先起作用。谢谢。

Answer 1

你忘记了self.response_txt。此外，'1'不是代码中bg的有效参数：

Button(self,
           bg='1',
           command = self.one_btn_clicked,
           height = 2
           ).grid(row = 2, column = 0, sticky = NSEW)

更正后的代码：

from tkinter import *




class Application(Frame):
    """ GUI application calculator. """ 
    def __init__(self, master):
        """ Initialize the frame. """
        super(Application, self).__init__(master)  

        # Adds the grid layout manager
        self.grid()

        # The result string
        self.response_str = ""

        #sets up the controls in the frame
        self.create_widgets()

    def create_widgets(self):
        """ Create and sequence """

        #Text Sequence
        self.sequence_txt = Text(self, height = 1, width = 30, wrap=WORD)
        self.sequence_txt.grid(row = 0, column = 0, columnspan = 2)
        self.response_txt = Text(self, height = 1, width = 30, wrap=WORD)
        self.response_txt.grid(row = 0, column = 0, columnspan = 2)
        # Configure the Text to center
        self.sequence_txt.tag_config("center_align", justify='center')

        # Configure the Text to center
        self.response_txt.tag_config("center_align", justify='center')

        ###buttons
        # Button 1
        Button(self,
               bg='white',
               command = self.one_btn_clicked,
               height = 2
               ).grid(row = 2, column = 0, sticky = NSEW)

    #buttons clicked
    def one_btn_clicked(self):
        """This method is run when the one button gets clicked"""
        #append a 1
        self.response_str+="1"
        #update text
        self.response_txt.delete(0.0, END)
        self.response_txt.insert(0.0, self.response_str, "center_align")
        #add number
        self.compare_sequences();
#main
root = Tk()
root.title("Calculator")
app = Application(root)
root.mainloop()

你还没有创建compare_sequences函数。

python计算器程序

1 个答案: