写出这个一直又问题还不会改希望大家能够指出一下问题

mkx1253

1. from tkinter import *
   
2. 
   
3. 
   
4. class Calculator:
   
5.     def __init__(self):
   
6.         self.symbol = ['+', '-', 'x', '/']
   
7. 
   
8.     def add(self):
   
9.         result = int(v1.get()) + int(v2.get())
   
10.         v3.set(str(result))
    
11. 
    
12.     def reduce(self):
    
13.         result = int(v1.get()) - int(v2.get())
    
14.         v3.set(str(result))
    
15. 
    
16.     def multiply(self):
    
17.         result = int(v1.get()) * int(v2.get())
    
18.         v3.set(str(result))
    
19. 
    
20.     def division(self):
    
21.         result = int(v1.get()) / int(v2.get())
    
22.         v3.set(str(result))
    
23. 
    
24. 
    
25. def main(v):
    
26.     cal = Calculator()
    
27. 
    
28.     if v == 1:
    
29.         q = 0
    
30.         compute = cal.add
    
31.     elif v == 2:
    
32.         q = 1
    
33.         compute = cal.reduce
    
34.     elif v == 3:
    
35.         q = 2
    
36.         compute = cal.multiply
    
37.     elif v == 4:
    
38.         q = 3
    
39.         compute = cal.division
    
40. 
    
41.     root = Tk()
    
42. 
    
43.     frame = Frame(root)
    
44.     frame.pack(padx=10, pady=10)
    
45. 
    
46.     l1 = Label(frame, text=cal.symbol[q])
    
47.     l2 = Label(frame, text='=')
    
48.     l1.grid(row=0, column=1)
    
49.     l2.grid(row=0, column=3)
    
50. 
    
51.     v1 = StringVar()
    
52.     v2 = StringVar()
    
53.     v3 = StringVar()
    
54. 
    
55.     def test(content):
    
56.         return content.isdigit()
    
57. 
    
58.     testCMD = root.register(test)
    
59. 
    
60.     e1 = Entry(frame, textvariable=v1, validate='key', validatecommand=(testCMD, '%P'), width=10)
    
61.     e2 = Entry(frame, textvariable=v2, validate='key', validatecommand=(testCMD, '%P'), width=10)
    
62.     e3 = Entry(frame, textvariable=v3, state='readonly', width=10)
    
63.     e1.grid(row=0, column=0)
    
64.     e2.grid(row=0, column=2)
    
65.     e3.grid(row=0, column=4)
    
66. 
    
67.     b1 = Button(frame, text='确定', command=compute, width=10)
    
68.     b2 = Button(frame, text='退出', command=root.quit, width=10)
    
69.     b1.grid(row=1, column=0, sticky=W, padx=5)
    
70.     b2.grid(row=1, column=4, sticky=E, pady=5)
    
71. 
    
72.     mainloop()
    
73. 
    
74. 
    
75. def start():
    
76.     lap = Tk()
    
77. 
    
78.     def count():
    
79.         main(v)
    
80. 
    
81.     frame = LabelFrame(lap, text='请选择计算种类：')
    
82.     frame.pack(padx=15, pady=15)
    
83. 
    
84.     list1 = [('加法计算', 1), ('减法计算', 2), ('乘法计算', 3), ('除法计算', 4)]
    
85.     v = StringVar()
    
86. 
    
87.     for each, num in list1:
    
88.         rb = Radiobutton(frame, text=each, variable=v, value=num, indicatoron=FALSE, command=count)
    
89.         rb.pack(fill=X)
    
90. 
    
91.     mainloop()
    
92. 
    
93. start()

复制代码

最后是显示这个错误

1. Exception in Tkinter callback
   
2. Traceback (most recent call last):
   
3.   File "C:\Program Files\Python36\lib\tkinter\__init__.py", line 1699, in __call__
   
4.     return self.func(*args)
   
5.   File "D:/tk7.py", line 79, in count
   
6.     main(v)
   
7.   File "D:/tk7.py", line 46, in main
   
8.     l1 = Label(frame, text=cal.symbol[q])
   
9. UnboundLocalError: local variable 'q' referenced before assignment

复制代码

zltzlt

应该加一句 v = int(v.get())。正确代码：

1. from tkinter import *
   
2. 
   
3. 
   
4. class Calculator:
   
5.     def __init__(self):
   
6.         self.symbol = ['+', '-', 'x', '/']
   
7. 
   
8.     def add(self):
   
9.         result = int(v1.get()) + int(v2.get())
   
10.         v3.set(str(result))
    
11. 
    
12.     def reduce(self):
    
13.         result = int(v1.get()) - int(v2.get())
    
14.         v3.set(str(result))
    
15. 
    
16.     def multiply(self):
    
17.         result = int(v1.get()) * int(v2.get())
    
18.         v3.set(str(result))
    
19. 
    
20.     def division(self):
    
21.         result = int(v1.get()) / int(v2.get())
    
22.         v3.set(str(result))
    
23. 
    
24. 
    
25. def main(v):
    
26.     cal = Calculator()
    
27. 
    
28.     v = int(v.get())
    
29.     if v == 1:
    
30.         q = 0
    
31.         compute = cal.add
    
32.     elif v == 2:
    
33.         q = 1
    
34.         compute = cal.reduce
    
35.     elif v == 3:
    
36.         q = 2
    
37.         compute = cal.multiply
    
38.     elif v == 4:
    
39.         q = 3
    
40.         compute = cal.division
    
41. 
    
42.     root = Tk()
    
43. 
    
44.     frame = Frame(root)
    
45.     frame.pack(padx=10, pady=10)
    
46. 
    
47.     l1 = Label(frame, text=cal.symbol[q])
    
48.     l2 = Label(frame, text='=')
    
49.     l1.grid(row=0, column=1)
    
50.     l2.grid(row=0, column=3)
    
51. 
    
52.     v1 = StringVar()
    
53.     v2 = StringVar()
    
54.     v3 = StringVar()
    
55. 
    
56.     def test(content):
    
57.         return content.isdigit()
    
58. 
    
59.     testCMD = root.register(test)
    
60. 
    
61.     e1 = Entry(frame, textvariable=v1, validate='key', validatecommand=(testCMD, '%P'), width=10)
    
62.     e2 = Entry(frame, textvariable=v2, validate='key', validatecommand=(testCMD, '%P'), width=10)
    
63.     e3 = Entry(frame, textvariable=v3, state='readonly', width=10)
    
64.     e1.grid(row=0, column=0)
    
65.     e2.grid(row=0, column=2)
    
66.     e3.grid(row=0, column=4)
    
67. 
    
68.     b1 = Button(frame, text='确定', command=compute, width=10)
    
69.     b2 = Button(frame, text='退出', command=root.quit, width=10)
    
70.     b1.grid(row=1, column=0, sticky=W, padx=5)
    
71.     b2.grid(row=1, column=4, sticky=E, pady=5)
    
72. 
    
73.     mainloop()
    
74. 
    
75. 
    
76. def start():
    
77.     lap = Tk()
    
78. 
    
79.     def count():
    
80.         main(v)
    
81. 
    
82.     frame = LabelFrame(lap, text='请选择计算种类：')
    
83.     frame.pack(padx=15, pady=15)
    
84. 
    
85.     list1 = [('加法计算', 1), ('减法计算', 2), ('乘法计算', 3), ('除法计算', 4)]
    
86.     v = StringVar()
    
87. 
    
88.     for each, num in list1:
    
89.         rb = Radiobutton(frame, text=each, variable=v, value=num, indicatoron=FALSE, command=count)
    
90.         rb.pack(fill=X)
    
91. 
    
92.     mainloop()
    
93. 
    
94. start()

复制代码

mkx1253

zltzlt 发表于 2019-10-14 21:28
应该加一句 v = int(v.get())。正确代码：

1. from tkinter import *
   
2. 
   
3. 
   
4. symbol = ['+', '-', 'x', '/']
   
5. 
   
6. 
   
7. def main(v):
   
8. 
   
9.     root = Tk()
   
10. 
    
11.     frame = Frame(root)
    
12.     frame.pack(padx=10, pady=10)
    
13. 
    
14.     l1 = Label(frame, text=symbol[v - 1])
    
15.     l2 = Label(frame, text='=')
    
16.     l1.grid(row=0, column=1)
    
17.     l2.grid(row=0, column=3)
    
18. 
    
19.     v1 = IntVar()
    
20.     v2 = IntVar()
    
21.     v3 = IntVar()
    
22. 
    
23.     def test(content):
    
24.         return content.isdigit()
    
25. 
    
26.     testCMD = root.register(test)
    
27. 
    
28.     e1 = Entry(frame, textvariable=v1, validate='key', validatecommand=(testCMD, '%P'), width=10)
    
29.     e2 = Entry(frame, textvariable=v2, validate='key', validatecommand=(testCMD, '%P'), width=10)
    
30.     e3 = Entry(frame, textvariable=v3, state='readonly', width=10)
    
31.     e1.grid(row=0, column=0)
    
32.     e2.grid(row=0, column=2)
    
33.     e3.grid(row=0, column=4)
    
34. 
    
35.     def add():
    
36.         result = int(v1.get()) + int(v2.get())
    
37.         v3.set(str(result))
    
38.         print(v1.get())
    
39.         print(v2.get())
    
40.         print(v3.get())
    
41. 
    
42.     def reduce():
    
43.         result = int(v1.get()) - int(v2.get())
    
44.         v3.set(str(result))
    
45. 
    
46.     def multiply():
    
47.         result = int(v1.get()) * int(v2.get())
    
48.         v3.set(str(result))
    
49. 
    
50.     def division():
    
51.         result = int(v1.get()) / int(v2.get())
    
52.         v3.set(str(result))
    
53. 
    
54.     if v == 1:
    
55.         compute = add
    
56.     elif v == 2:
    
57.         compute = reduce
    
58.     elif v == 3:
    
59.         compute = multiply
    
60.     elif v == 4:
    
61.         compute = division
    
62. 
    
63.     b1 = Button(frame, text='确定', command=compute, width=10)
    
64.     b2 = Button(frame, text='退出', command=root.quit, width=10)
    
65.     b1.grid(row=1, column=0, sticky=W, padx=5)
    
66.     b2.grid(row=1, column=4, sticky=E, pady=5)
    
67. 
    
68.     mainloop()
    
69. 
    
70. 
    
71. def start():
    
72.     lap = Tk()
    
73. 
    
74.     def count():
    
75.         q = int(v.get())
    
76.         print(type(q))
    
77.         main(q)
    
78. 
    
79.     frame = LabelFrame(lap, text='请选择计算种类：')
    
80.     frame.pack(padx=15, pady=15)
    
81. 
    
82.     list1 = [('加法计算', 1), ('减法计算', 2), ('乘法计算', 3), ('除法计算', 4)]
    
83.     v = IntVar()
    
84. 
    
85.     for each, num in list1:
    
86.         rb = Radiobutton(frame, text=each, variable=v, value=num, indicatoron=FALSE, command=count)
    
87.         rb.pack(fill=X)
    
88. 
    
89.     mainloop()
    
90. 
    
91. 
    
92. start()

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您看下，我这里稍微改了一下，不过他无论输入什么数，它的v1.get（），v2.get()，和v3.get()都是0