1 import tkinter
2
3
4 # # 设置显示窗体及其属性
5 windows = tkinter.Tk() # 70*60
6 windows.title('SkyGrass catulator')
7 windows.geometry('280x440')
8 windows.resizable(width=False, height=False)
9
10
11 # # 定义显示界面，一个输入的数字界面，另一个是结果显示界面
12 result_user = tkinter.StringVar() # 用户按键显示界面
13 result_user.set(0)
14 result_end = tkinter.StringVar() # 计算结果返回界面
15 result_end.set('')
16
17 label = tkinter.Label(windows, font=('黑体', 21),fg='black',anchor = 'se',textvariable=result_user)
18 label.place(x = 0, y = 90, width = 280, height = 50)
19 label = tkinter.Label(windows, font=('黑体', 18),fg='#4F4F4F',anchor = 'se',textvariable=result_end)
20 label.place(y = 10, width = 280, height = 70)
21
22
23 ## 数字按键
24 btn0 = tkinter.Button(windows,text = '0',font = ('微软雅黑',20),fg = ('red'),bg ='#87CEE8',bd = 1, command = lambda : pressNum('0'))
25 btn0.place(x = 0,y = 380,width = 70,height = 60)
26
27 btn1 = tkinter.Button(windows,text = '1',font = ('微软雅黑',20),fg = ('red'),bg ='#87CEE8',bd = 1,command = lambda : pressNum('1'))
28 btn1.place(x = 0,y = 320,width = 70,height = 60)
29 btn2 = tkinter.Button(windows,text = '2',font = ('微软雅黑',20),fg = ('red'),bg ='#87CEE8',bd = 1,command = lambda : pressNum('2'))
30 btn2.place(x = 70,y = 320,width = 70,height = 60)
31 btn3 = tkinter.Button(windows,text = '3',font = ('微软雅黑',20),fg = ('red'),bg ='#87CEE8',bd = 1,command = lambda : pressNum('3'))
32 btn3.place(x = 140,y = 320,width = 70,height = 60)
33
34 btn4 = tkinter.Button(windows,text = '4',font = ('微软雅黑',20),fg = ('red'),bg ='#87CEE8',bd = 1,command = lambda : pressNum('4'))
35 btn4.place(x = 0,y = 260,width = 70,height = 60)
36 btn5 = tkinter.Button(windows,text = '5',font = ('微软雅黑',20),fg = ('red'),bg ='#87CEE8',bd = 1,command = lambda : pressNum('5'))
37 btn5.place(x = 70,y = 260,width = 70,height = 60)
38 btn6 = tkinter.Button(windows,text = '6',font = ('微软雅黑',20),fg = ('red'),bg ='#87CEE8',bd = 1,command = lambda : pressNum('6'))
39 btn6.place(x = 140,y = 260,width = 70,height = 60)
40
41 btn7 = tkinter.Button(windows,text = '7',font = ('微软雅黑',20),fg = ('red'),bg ='#87CEE8',bd = 1,command = lambda : pressNum('7'))
42 btn7.place(x = 0,y = 200,width = 70,height = 60)
43 btn8 = tkinter.Button(windows,text = '8',font = ('微软雅黑',20),fg = ('red'),bg ='#87CEE8',bd = 1,command = lambda : pressNum('8'))
44 btn8.place(x = 70,y = 200,width = 70,height = 60)
45 btn9 = tkinter.Button(windows,text = '9',font = ('微软雅黑',20),fg = ('red'),bg ='#87CEE8',bd = 1,command = lambda : pressNum('9'))
46 btn9.place(x = 140,y = 200,width = 70,height = 60)
47
48
49
50 # # 字符按键
51 btntop = tkinter.Button(windows,text = '.',font = ('微软雅黑',20),fg = ('blue'),bg ='#87CEE8',bd = 1,command = lambda : pressCompu('.'))
52 btntop.place(x = 140,y = 380,width = 70,height = 60)
53 btnsum = tkinter.Button(windows,text = '=',font = ('微软雅黑',20),bg=('orange'),fg=('blue'),bd = 1,command = lambda : pressEqual())
54 btnsum.place(x = 210,y = 320,width = 70,height = 120)
55 btnadd = tkinter.Button(windows,text = '+',font = ('微软雅黑',20),fg = ('blue'),bg='#A9A9A9',bd = 1,command = lambda : pressCompu('+'))
56 btnadd.place(x = 210,y = 200,width = 70,height = 120)
57 btnsub = tkinter.Button(windows,text = '-',font = ('微软雅黑',20),fg = ('blue'),bg='#A9A9A9',bd = 1,command = lambda : pressCompu('-'))
58 btnsub.place(x = 210,y = 140,width = 70,height = 60)
59 btnmul = tkinter.Button(windows,text = '*',font = ('微软雅黑',20),fg = ('blue'),bg='#A9A9A9',bd = 1,command = lambda : pressCompu('*'))
60 btnmul.place(x = 140,y = 140,width = 70,height = 60)
61 btndiv = tkinter.Button(windows,text = '/',font = ('微软雅黑',20),fg = ('blue'),bg='#A9A9A9',bd = 1,command = lambda : pressCompu('/'))
62 btndiv.place(x = 70,y = 140,width = 70,height = 60)
63 btnclr = tkinter.Button(windows,text = 'AC',font = ('微软雅黑',20),bg=('orange'),fg = ('blue'),bd = 1,command = lambda : pressCompu('AC'))
64 btnclr.place(x = 0,y = 140,width = 70,height = 60)
65 btnb = tkinter.Button(windows,text = '←',font = ('微软雅黑',20),fg = ('blue'),bg='orange',bd = 1,command = lambda : pressCompu('b'))
66 btnb.place(x = 70,y = 380,width = 70,height = 60)
67
68
69 #操作函数
70 user_list = [] #设置一个变量 保存运算数字和符号的列表
71 isPressSign = False #添加一个判断是否按下运算符号的标志,假设默认没有按下按钮
72 isPressNum = False
73 #数字函数
74 def pressNum(num): #设置一个数字函数 判断是否按下数字 并获取数字将数字写在显示版上
75 global user_list #全局化lists和按钮状态isPressSign
76 global isPressSign
77 if isPressSign == False:
78 pass
79 else: #重新将运算符号状态设置为否
80 result_user.set(0)
81 isPressSign = False
82
83 #判断界面的数字是否为0
84 oldnum = result_user.get()
85 if oldnum =='0': #如过界面上数字为0 则获取按下的数字
86 result_user.set(num)
87 else: #如果界面上的而数字不是0 则链接上新按下的数字
88 newnum = oldnum + num
89 result_user.set(newnum) #将按下的数字写到面板中
90
91
92 #运算函数
93 def pressCompu(sign):
94 global user_list
95 global isPressSign
96 num = result_user.get()
97 user_list.append(num)
98
99 user_list.append(sign)
100 isPressSign = True
101
102 if sign =='AC':
103 user_list.clear()
104 result_user.set(0)
105 if sign =='b':
106 a = num[0:-1]
107 user_list.clear()
108 result_user.set(a)
109
110
111
112 #获取运算结果函数
113 def pressEqual():
114 global user_list
115 global isPressSign
116
117
118 curnum = result_user.get() #设置当前数字变量，并获取添加到列表
119 user_list.append(curnum)
120
121 computrStr = ''.join(user_list)
122 endNum = eval(computrStr)
123 result_user.set(endNum)
124 result_end.set(computrStr)
125 user_list.clear()
126
127 windows.mainloop()
来源：https://www.cnblogs.com/skygrass0531/p/12298926.html