GUI Calculator source code in python

Today i provide a GUI calculator source code in python............

You can try this on your python editor......

I am vivek you can call me spy....

1. from Tkinter import *
2. import tkMessageBox
3.
4. def calc () :
5. try :
6. #addition
7. if oper.get () == '+' :
8. try :
9. value = float( num1.get ()) + float (num2.get ())
10. except :
11. tkMessageBox.showerror ("Error!" , 'Something went wrong! Maybe invalid entries' )
12.
13. #subtraction
14. if oper.get () == '-' :
15. try :
16. value = float( num1.get ()) - float (num2.get ())
17. except :
18. tkMessageBox.showerror ("Error!" , 'Something went wrong! Maybe invalid entries' )
19. #multiplication
20. if oper.get () == 'x' or oper.get () == '*' :
21. try :
22. value = float( num1.get ()) * float (num2.get ())
23. except :
24. tkMessageBox.showerror ("Error!" , 'Something went wrong! Maybe invalid entries' )
25. #Division
26. if oper.get () == '/' :
27. if num2.get () == '0' :
28. #checks if user is trying to divide by zero
29. tkMessageBox.showerror ('Division Error' , 'num2 value = 0 No dividing by 0' )
30. else:
31. try :
32. value = float( num1.get ()) / float (num2.get ())
33. except :
34. tkMessageBox.showerror ("Error!" , 'Something went wrong! Maybe invalid entries' )
35.
36. str ( num1 )
37. str ( oper)
38. str ( num2 )
39. answer = Label (app, text= '{0} {1} {2}=' .format ( num1.get () , oper.get () , num2.get ()))
40. answer.grid ( row= 3 , column= 0, sticky=SW )
41. answer2 = Label (app, text=value )
42. answer2.grid (row= 4, column= 0, sticky=S )
43. except :
44. tkMessageBox.showerror ("Error!" , 'Something went wrong! Maybe invalid entries' )
45.
46.
47. global value
48. value = 0
49.
50. #Modify window
51. root = Tk ()
52. root.title ('Calculator by Nicholas Cannon' )
53. root.geometry ('340x132' )
54. root.resizable (0,0 )
55.
56.
57. #creating frame
58. app = Frame (root)
59. app.pack ()
60.
61. #window attributes below
62. label1 = Label (app, text= 'Enter number 1 -->' )
63. label1.grid ( row=0, column=0, sticky=NW )
64.
65. label2 = Label (app, text= 'Enter operator -->' )
66. label2.grid ( row= 1 , column=0, sticky=W )
67.
68. label3 = Label (app, text= 'Enter number 2 -->' )
69. label3.grid ( row= 2 , column= 0, sticky=W )
70.
71. global num1
72. num1 = StringVar ()
73. number1 = Entry (app, textvariable= num1 )
74. number1.grid (row=0, column= 1 , sticky=NE )
75.
76. global oper
77. oper = StringVar ()
78. operator = Entry (app, textvariable= oper )
79. operator.grid (row= 1, column= 1, sticky=E )
80.
81. global num2
82. num2 = StringVar ()
83. number2 = Entry (app, textvariable = num2 )
84. number2.grid (row= 2, column= 1 , sticky=E )
85.
86. button = Button (app, text= 'Calculate' , command = calc )
87. button.grid ( row= 3 , column= 1, sticky=SE )
88.
89.
90.
91.
92.
93.
94.
95. #start main loop
96. root.mainloop ()

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