Question

我想创建一个类，然后创建一个对象，该对象也会在我创建的显示器中显示一个红色方块。

此刻，我只能显示蓝色方块，它不是“ Baustein”类的对象。

这是我现在正在使用的2个文件：

Bauklotz_class.py

from gui_backup import Display
class Baustein:
    x1, y1, x2, y2 = 10,10,20,20
    color = "red"
    def __init__(self, x1, y1, x2, y2, color):
        self.x1 = x1
        self.x2 = x2
        self.y1 = y1
        self.y2 = y2
        self.color = color
    def show_new_object(self):
        quadrat2 = Display.create_rectangle(40, 50, 60, 70, fill = color)
        Display.coords(quadrat2, x1, y1, x2, y2)

gui_backup.py

from tkinter import *
import curses
import Bauklotz_class

x1 = 10   #initialise coordinates
y1 = 10
x2 = 20
y2 = 20

root = Tk() #create window
root.wm_title("Raspberry Pi GUI") #window title
root.config(background = "#FFFFFF") #background color

#The whole left frame and widgets involved
leftFrame = Frame(root, width=200, height = 400)
leftFrame.grid(row=0, column = 0, padx = 10, pady = 3)
leftLabel1 = Label(leftFrame, text = "Platzhalter Text")
leftLabel1.grid(row = 0, column = 0, padx = 10, pady = 3)
leftLabel2 = Label(leftFrame, text = "Dies ist ein Text\nmit mehreren Zeilen")
leftLabel2.grid(row = 1, column = 0, padx = 10, pady = 3)


#the whole right frame and widgets involved
rightFrame = Frame(root, width=400, height = 400)
rightFrame.grid(row = 0, column = 1, padx = 10, pady = 3)
E1 = Entry(rightFrame, width = 50)
E1.grid(row = 0, column = 0, padx = 10, pady = 60)

#The two functions for the 2 buttons created
def callback1():
    test = Bauklotz_class.Baustein(20, 30, 40, 50, "red")
    test.show_new_object()

def callback2():
    print(1+1)

buttonFrame = Frame(rightFrame)
buttonFrame.grid(row = 1, column = 0, padx = 10, pady = 60)
B1 = Button(buttonFrame, text = "Button1", bg = "#FF0000", width = 15, command = callback1)
B1.grid(row = 0, column = 0, padx = 10, pady = 60)
B2 = Button(buttonFrame, text = "Button2", bg ="#FFFF00", width = 15, command = callback2)
B2.grid(row = 0, column = 1, padx = 10, pady = 60)

Slider = Scale(rightFrame, from_ = 0, to = 100, resolution = 0.1, orient = HORIZONTAL, length = 400)
Slider.grid(row = 2, column = 0, padx = 10, pady = 3)

Display = Canvas(rightFrame, width = 300, height = 300)
Display.configure(background = 'black')
Display.grid(row = 1, column = 3, padx = 10, pady = 3)

quadrat = Display.create_rectangle(20, 30, 40, 50, fill = "blue")
Display.coords(quadrat, x1, y1, x2, y2)


#following functions are for coordination of the square
#also you can find here the exceptions so that the object
#cant break out of the display widget

def down(event):
    global x1, y1, x2, y2
    if x2 == 290 or y2 == 300:
        pass
    else:
        y1 += 10
        y2 += 10
        Display.coords(quadrat, x1, y1, x2, y2)
        leftLabel1.config(text = "x1: " + str(x1) + ", x2:" + str(x2) + ", y1:" + str(y1) + ", y2:" + str(y2), width = "40" , )
def up(event):
    global x1, y1, x2, y2
    if x2 == 0 or y2 == 10:
        pass
    else:
        y1 -= 10
        y2 -= 10
        Display.coords(quadrat, x1, y1, x2, y2)
        leftLabel1.config(text = "x1: " + str(x1) + ", x2:" + str(x2) + ", y1:" + str(y1) + ", y2:" + str(y2), width = "40" , )
def left(event):
    global x1, y1, x2, y2
    if x1 == 0 or y1 == 10:
        pass
    else:
        x1 -= 10
        x2 -= 10
        Display.coords(quadrat, x1, y1, x2, y2)
        leftLabel1.config(text = "x1: " + str(x1) + ", x2:" + str(x2) + ", y1:" + str(y1) + ", y2:" + str(y2), width = "40" , )
def right(event):
    global x1, y1, x2, y2
    if x1 == 290 or y1 == 300:
        pass
    else:
        x1 += 10
        x2 += 10
        Display.coords(quadrat, x1, y1, x2, y2)
        leftLabel1.config(text = "x1: " + str(x1) + ", x2:" + str(x2) + ", y1:" + str(y1) + ", y2:" + str(y2), width = "40" , )    
root.bind('<a>', left)
root.bind('<w>', up)
root.bind('<s>', down)
root.bind('<d>', right)


root.mainloop()

现在我只有一个问题，正在生成以下错误：AttributeError：模块'Bauklotz_class'没有属性'Baustein'。我真的无法弄清楚python的含义，我也是OOP中的新手，尤其是Python。有人可以帮我解决这个问题吗？

这是我收到的完整错误消息：

Tkinter回调Traceback中的异常（最近一次调用最后一次）：
在调用中，文件“ /usr/lib/python3.5/tkinter/init.py”，第1562行返回self.func（* args）文件“/home/pi/Documents/TKinter_Übung/gui_backup.py”，第31行，在回调1 测试= Bauklotz_class.Baustein（20，30，40，50，“红色”）AttributeError：模块'Bauklotz_class'没有属性'Baustein'

Answer 1

Callback1函数中的这一行：

 test = Bauklotz_class.Baustein()

需要括号中的5个值（“ x1”，“ y1”，“ x2”，“ y2”和“颜色”）因为它正在调用您的baustein类，该类在init函数中要求这些参数：

def __init__(self, x1, y1, x2, y2, color):

类型错误：缺少多个.py文件所需的位置参数

1 个答案: