└── calculator on python


/calculator on python:
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 1 | from tkinter import *
 2 | 
 3 | 
 4 | class Main(Frame):
 5 |     def __init__(self, root):
 6 |         super(Main, self).__init__(root)
 7 |         self.build()
 8 | 
 9 |     def build(self):
10 |         self.formula = "0"
11 |         self.lbl = Label(text=self.formula, font=("Times New Roman", 21, "bold"), bg="#000", foreground="#FFF")
12 |         self.lbl.place(x=11, y=50)
13 | 
14 |         btns = [
15 |             "C", "DEL", "*", "=",
16 |             "1", "2", "3", "/",
17 |             "4", "5", "6", "+",
18 |             "7", "8", "9", "-",
19 |             "(", "0", ")", "X^2"
20 |         ]
21 | 
22 |         x = 10
23 |         y = 140
24 |         for bt in btns:
25 |             com = lambda x=bt: self.logicalc(x)
26 |             Button(text=bt, bg="#FFF",
27 |                    font=("Times New Roman", 15),
28 |                    command=com).place(x=x, y=y,
29 |                                       width=115,
30 |                                       height=79)
31 |             x += 117
32 |             if x > 400:
33 |                 x = 10
34 |                 y += 81
35 | 
36 |     def logicalc(self, operation):
37 |         if operation == "C":
38 |             self.formula = ""
39 |         elif operation == "DEL":
40 |             self.formula = self.formula[0:-1]
41 |         elif operation == "X^2":
42 |             self.formula = str((eval(self.formula))**2)
43 |         elif operation == "=":
44 |             self.formula = str(eval(self.formula))
45 |         else:
46 |             if self.formula == "0":
47 |                 self.formula = ""
48 |             self.formula += operation
49 |         self.update()
50 | 
51 |     def update(self):
52 |         if self.formula == "":
53 |             self.formula = "0"
54 |         self.lbl.configure(text=self.formula)
55 | 
56 | 
57 | if __name__ == '__main__':
58 |     root = Tk()
59 |     root["bg"] = "#000"
60 |     root.geometry("485x550+200+200")
61 |     root.title("Калькулятор")
62 |     root.resizable(False, False)
63 |     app = Main(root)
64 |     app.pack()
65 |     root.mainloop()
66 | 


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