Easier version of GUI Calculator

Calculator2.py

@@ -0,0 +1,122 @@
+from tkinter import *
+root=Tk()
+root.title("Digital Calculator")
+
+text_field=Entry(root,width=32,borderwidth=5,justify='right',bg="powder blue",bd=10,font="arial 12 bold")
+text_field.grid(row=0,column=0,columnspan=4)
+
+
+def btn_click(num):
+    current=text_field.get()
+    text_field.delete(0, END)
+    text_field.insert(0,str(current)+str(num))
+
+def btn_clickd(dec):
+    current=text_field.get()
+    text_field.delete(0, END)
+    text_field.insert(0,str(current)+dec)
+
+def btn_clear():
+    text_field.delete(0, END)
+    #text_field.insert(0,"0")
+
+def btn_del():
+    length=len(text_field.get())
+    text_field.delete(length-1,'end')
+    if length==1:
+        text_field.insert(0,'0')
+
+def btn_add():
+    first_number=text_field.get()
+    global pre_num
+    global math
+    math="addition"
+    pre_num=float(first_number)
+    text_field.delete(0,END)
+
+def btn_equal():
+    try:
+        second_number=text_field.get()
+        text_field.delete(0,END)
+        if math=="addition":
+            text_field.insert(0,pre_num + float(second_number))
+        if math=="multiply":
+            text_field.insert(0,pre_num * float(second_number))
+        if math=="subtraction":
+            text_field.insert(0,pre_num - float(second_number))
+        if math=="divide":
+            text_field.insert(0,pre_num / float(second_number))
+    except:
+        text_field.insert(0,"NOT DEFINED")
+
+def btn_subtract():
+    first_number=text_field.get()
+    global pre_num
+    global math
+    math="subtraction"
+    pre_num=float(first_number)
+    text_field.delete(0,END)
+
+def btn_multiply():
+    first_number=text_field.get()
+    global pre_num
+    global math
+    math="multiply"
+    pre_num=float(first_number)
+    text_field.delete(0,END)
+
+def btn_divide():
+    first_number=text_field.get()
+    global pre_num
+    global math
+    math="divide"
+    pre_num=float(first_number)
+    text_field.delete(0,END)
+
+button_1=Button(root,text="1",padx=23,pady=10,command=lambda: btn_click(1),bg="black",fg="white",bd=5,font="arial 12 bold")
+button_2=Button(root,text="2",padx=23,pady=10,command=lambda: btn_click(2),bg="black",fg="white",bd=5,font="arial 12 bold")
+button_3=Button(root,text="3",padx=23,pady=10,command=lambda: btn_click(3),bg="black",fg="white",bd=5,font="arial 12 bold")
+button_4=Button(root,text="4",padx=23,pady=10,command=lambda: btn_click(4),bg="black",fg="white",bd=5,font="arial 12 bold")
+button_5=Button(root,text="5",padx=23,pady=10,command=lambda: btn_click(5),bg="black",fg="white",bd=5,font="arial 12 bold")
+button_6=Button(root,text="6",padx=23,pady=10,command=lambda: btn_click(6),bg="black",fg="white",bd=5,font="arial 12 bold")
+button_7=Button(root,text="7",padx=23,pady=10,command=lambda: btn_click(7),bg="black",fg="white",bd=5,font="arial 12 bold")
+button_8=Button(root,text="8",padx=23,pady=10,command=lambda: btn_click(8),bg="black",fg="white",bd=5,font="arial 12 bold")
+button_9=Button(root,text="9",padx=23,pady=10,command=lambda: btn_click(9),bg="black",fg="white",bd=5,font="arial 12 bold")
+button_0=Button(root,text="0",padx=65,pady=10,command=lambda: btn_click(0),bg="black",fg="white",bd=5,font="arial 12 bold")
+button_decimal=Button(root,text=".",padx=24,pady=10,command=lambda: btn_clickd("."),bg="black",fg="white",bd=5,font="arial 12 bold")
+
+button_m=Button(root,text="AC",padx=15,pady=10,command=btn_clear,bg="black",fg="white",bd=5,font="arial 12 bold")
+
+
+button_add=Button(root,text="+",padx=22,pady=10,command=btn_add,bg="black",fg="white",bd=5,font="arial 12 bold")
+button_subtract=Button(root,text="-",padx=23,pady=10,command=btn_subtract,bg="black",fg="white",bd=5,font="arial 12 bold")
+button_multiply=Button(root,text="*",padx=23,pady=10,command=btn_multiply,bg="black",fg="white",bd=5,font="arial 12 bold")
+button_divide=Button(root,text="/",padx=25,pady=10,command=btn_divide,bg="black",fg="white",bd=5,font="arial 12 bold")
+button_equal=Button(root,text="=",padx=23,pady=42,command=btn_equal,bg="black",fg="white",bd=5,font="arial 12 bold")
+DEL=Button(root,text="DEL",padx=12,pady=10,command=btn_del,bg="black",fg="white",bd=5,font="arial 12 bold")
+
+button_m.grid(row=1,column=0)
+button_divide.grid(row=1,column=2)
+button_multiply.grid(row=1,column=3)
+button_subtract.grid(row=2,column=3)
+
+button_7.grid(row=2,column=0)
+button_8.grid(row=2,column=1)
+button_9.grid(row=2,column=2)
+button_add.grid(row=3,column=3)
+
+button_4.grid(row=3,column=0)
+button_5.grid(row=3,column=1)
+button_6.grid(row=3,column=2)
+
+button_1.grid(row=4,column=0)
+button_2.grid(row=4,column=1)
+button_3.grid(row=4,column=2)
+button_equal.grid(row=4,column=3,rowspan=2)
+
+button_0.grid(row=5,column=0,columnspan=2)
+button_decimal.grid(row=5,column=2)
+DEL.grid(row=1,column=1)
+
+root.resizable(0,0)
+root.mainloop()