Merge pull request Aashishkumar123#3 from codeshoper/master

Update tk-calculator.py

Author: Aashishkumar123

calculator/tk-calculator.py

@@ -1,5 +1,7 @@
+#importing modules
 import tkinter as tk
 from tkinter import *
+#defining attributes of main window 
 root = tk.Tk()
 root.geometry("170x230")
 root.title("Calculator")
@@ -12,144 +14,92 @@
 
 
 # <====================  Button Operation code starts here.. ==============>
-def nine():
-        inp.insert("end","9")
 
-def eight():
-        inp.insert("end","8")
-
-def seven():
-        inp.insert("end","7")
-
-def six():
-        inp.insert("end","6")
-
-def five():
-        inp.insert("end","5")
-
-def four():
-        inp.insert("end","4")
-
-def three():
-        inp.insert("end","3")
-
-def two():
-        inp.insert("end","2")
-
-def one():
-        inp.insert("end","1")
-
-def zero():
-        inp.insert("end","0")
-
-def double_zero():
-        inp.insert("end","00")
-
-def dot():
-        inp.insert("end",".")
-
-def plus():
-        inp.insert("end","+")
-
-def minus():
-        inp.insert("end","-")
-
-def mul():
-        inp.insert("end","*")
-
-def divide():
-        inp.insert("end","/")
-
-def modulus():
-        inp.insert("end","%")
 
 def result():
-
-
-        if inp.get() == "":
-                inp.insert("end","error")
-        elif inp.get()[0] == "0":
-                inp.delete(0,"end")
-                inp.insert("end","error")
-
-        else:
+        try:
+                
+            if inp.get() == "":
+                        inp.insert("end","error")
+            elif inp.get()[0] == "0":
+                        inp.delete(0,"end")
+                        inp.insert("end","error")
+
+            else:
                 res = inp.get()
                 res = eval(res)
                 inp.insert("end"," = ")
                 inp.insert("end",res)
-
-def clear():
-        inp.delete(0,"end")
-
-
+        except SyntaxError:
+            inp.insert("end","invalid input")
 # <============ end code ================>
 
 
 
 # <============= Button Design Code starts here.. ==================>
-
-clear = Button(root,text="C",width=2,command=clear,bg="red",fg="white",relief=RIDGE)
+# using lambda instead of functions to make the use of buttons more clear
+clear = Button(root,text="C",width=2,command=lambda:inp.delete(0,"end"),bg="red",fg="white",relief=RIDGE)
 clear.grid(row=0,sticky="w",padx=125)
 
 
-nine = Button(text="9",width=2,command=nine,borderwidth=3,relief=RIDGE)
+nine = Button(text="9",width=2,command=lambda:inp.insert("end","9"),borderwidth=3,relief=RIDGE)
 nine.grid(row=1,sticky="w",padx=15)
 
-eight = Button(text="8",width=2,command=eight,borderwidth=3,relief=RIDGE)
+eight = Button(text="8",width=2,command=lambda:inp.insert("end","8"),borderwidth=3,relief=RIDGE)
 eight.grid(row=1,sticky="w",padx=45)
 
-seven = Button(root,text="7",width=2,command=seven,borderwidth=3,relief=RIDGE)
+seven = Button(root,text="7",width=2,command=lambda:inp.insert("end","7"),borderwidth=3,relief=RIDGE)
 seven.grid(row=1,sticky="w",padx=75)
 
-plus = Button(root,text="+",width=2,command=plus,borderwidth=3,relief=RIDGE)
+plus = Button(root,text="+",width=2,command=lambda:inp.insert("end","+"),borderwidth=3,relief=RIDGE)
 plus.grid(row=1,sticky="e",padx=125)
 
 
-six = Button(text="6",width=2,command=six,borderwidth=3,relief=RIDGE)
+six = Button(text="6",width=2,command=lambda:inp.insert("end","6"),borderwidth=3,relief=RIDGE)
 six.grid(row=2,sticky="w",padx=15,pady=5)
 
-five = Button(text="5",width=2,command=five,borderwidth=3,relief=RIDGE)
+five = Button(text="5",width=2,command=lambda:inp.insert("end","5"),borderwidth=3,relief=RIDGE)
 five.grid(row=2,sticky="w",padx=45,pady=5)
 
-four = Button(root,text="4",width=2,command=four,borderwidth=3,relief=RIDGE)
+four = Button(root,text="4",width=2,command=lambda:inp.insert("end","4"),borderwidth=3,relief=RIDGE)
 four.grid(row=2,sticky="w",padx=75,pady=5)
 
-minus = Button(root,text="-",width=2,command=minus,borderwidth=3,relief=RIDGE)
+minus = Button(root,text="-",width=2,command=lambda:inp.insert("end","-"),borderwidth=3,relief=RIDGE)
 minus.grid(row=2,sticky="e",padx=125,pady=5)
 
 
 
-three = Button(text="3",width=2,command=three,borderwidth=3,relief=RIDGE)
+three = Button(text="3",width=2,command=lambda:inp.insert("end","3"),borderwidth=3,relief=RIDGE)
 three.grid(row=3,sticky="w",padx=15,pady=5)
 
-two = Button(text="2",width=2,command=two,borderwidth=3,relief=RIDGE)
+two = Button(text="2",width=2,command=lambda:inp.insert("end","2"),borderwidth=3,relief=RIDGE)
 two.grid(row=3,sticky="w",padx=45,pady=5)
 
-one = Button(root,text="1",width=2,command=one,borderwidth=3,relief=RIDGE)
+one = Button(root,text="1",width=2,command=lambda:inp.insert("end","1"),borderwidth=3,relief=RIDGE)
 one.grid(row=3,sticky="w",padx=75,pady=5)
 
-multiply = Button(root,text="*",width=2,command=mul,borderwidth=3,relief=RIDGE)
+multiply = Button(root,text="*",width=2,command=lambda:inp.insert("end","*"),borderwidth=3,relief=RIDGE)
 multiply.grid(row=3,sticky="e",padx=125,pady=5)
 
 
-zero = Button(text="0",width=2,command=zero,borderwidth=3,relief=RIDGE)
+zero = Button(text="0",width=2,command=lambda:inp.insert("end","0"),borderwidth=3,relief=RIDGE)
 zero.grid(row=4,sticky="w",padx=15,pady=5)
 
-double_zero = Button(text="00",width=2,command=double_zero,borderwidth=3,relief=RIDGE)
+double_zero = Button(text="00",width=2,command=lambda:inp.insert("end","00"),borderwidth=3,relief=RIDGE)
 double_zero.grid(row=4,sticky="w",padx=45,pady=5)
 
-dot = Button(root,text=".",width=2,command=dot,borderwidth=3,relief=RIDGE)
+dot = Button(root,text=".",width=2,command=lambda:inp.insert("end","."),borderwidth=3,relief=RIDGE)
 dot.grid(row=4,sticky="w",padx=75,pady=5)
 
-divide = Button(root,text="/",width=2,command=divide,borderwidth=3,relief=RIDGE)
+divide = Button(root,text="/",width=2,command=lambda:inp.insert("end","/"),borderwidth=3,relief=RIDGE)
 divide.grid(row=4,sticky="e",padx=125,pady=5)
 
 result = Button(root,text="=",width=10,command=result,bg="red",fg="white",borderwidth=3,relief=RIDGE)
 result.grid(row=5,sticky="w",padx=15,pady=5)
 
-modulus = Button(root,text="%",width=2,command=modulus,borderwidth=3,relief=RIDGE)
+modulus = Button(root,text="%",width=2,command=lambda:inp.insert("end","%"),borderwidth=3,relief=RIDGE)
 modulus.grid(row=5,sticky="e",padx=125,pady=5)
 
 root.mainloop()
 
-# <============ end code ==============>
+# <============ end code ==============>