diff --git a/My cal.py b/My cal.py
index d5be8a4..97f8db2 100644
--- a/My cal.py	
+++ b/My cal.py	
@@ -1,98 +1,124 @@
-from tkinter import*
+from tkinter import *
 
-me=Tk()
+me = Tk()
 me.geometry("354x460")
 me.title("CALCULATOR")
-melabel = Label(me,text="CALCULATOR",bg='White',font=("Times",30,'bold'))
-melabel.pack(side=TOP)
-me.config(background='Dark gray')
+melabel = Label(me, text="CALCULATOR", bg='dark grey', font=("Times", 30, 'bold'))
+melabel.pack(side=TOP,pady=1)
+me.config(background='Dark grey')
 
-textin=StringVar()
-operator=""
+# fixing the window size
+me.maxsize(354,460)
+me.minsize(354,460)
+
+textin = StringVar()
+operator = ""
+
+
+def clickbut(number):  # lambda:clickbut(1)
+    global operator
+    operator = operator + str(number)
+    textin.set(operator)
 
-def clickbut(number):   #lambda:clickbut(1)
-     global operator
-     operator=operator+str(number)
-     textin.set(operator)
 
 def equlbut():
-     global operator
-     add=str(eval(operator))
-     textin.set(add)
-     operator=''
+    global operator
+    add = str(eval(operator))
+    textin.set(add)
+    operator = ''
+
+
 def equlbut():
-     global operator
-     sub=str(eval(operator))
-     textin.set(sub)
-     operator=''     
+    global operator
+    sub = str(eval(operator))
+    textin.set(sub)
+    operator = ''
+
+
 def equlbut():
-     global operator
-     mul=str(eval(operator))
-     textin.set(mul)
-     operator=''
+    global operator
+    mul = str(eval(operator))
+    textin.set(mul)
+    operator = ''
+
+
 def equlbut():
-     global operator
-     div=str(eval(operator))
-     textin.set(div)
-     operator=''    
+    global operator
+    div = str(eval(operator))
+    textin.set(div)
+    operator = ''
 
-def clrbut():
-     textin.set('')
 
-     
-metext=Entry(me,font=("Courier New",12,'bold'),textvar=textin,width=25,bd=5,bg='powder blue')
-metext.pack()
+def clrbut():
+    textin.set('')
 
-but1=Button(me,padx=14,pady=14,bd=4,bg='white',command=lambda:clickbut(1),text="1",font=("Courier New",16,'bold'))
-but1.place(x=10,y=100)
 
-but2=Button(me,padx=14,pady=14,bd=4,bg='white',command=lambda:clickbut(2),text="2",font=("Courier New",16,'bold'))
-but2.place(x=10,y=170)
+metext = Entry(me, font=("Courier New", 16, 'bold'), textvar=textin, width=25, bd=5, bg='powder blue')
+metext.pack(pady=2)
 
-but3=Button(me,padx=14,pady=14,bd=4,bg='white',command=lambda:clickbut(3),text="3",font=("Courier New",16,'bold'))
-but3.place(x=10,y=240)
+but1 = Button(me, padx=14, pady=14, bd=4, bg='white', command=lambda: clickbut(1), text="1",
+              font=("Courier New", 16, 'bold'))
+but1.place(x=10, y=100)
 
-but4=Button(me,padx=14,pady=14,bd=4,bg='white',command=lambda:clickbut(4),text="4",font=("Courier New",16,'bold'))
-but4.place(x=75,y=100)
+but2 = Button(me, padx=14, pady=14, bd=4, bg='white', command=lambda: clickbut(2), text="2",
+              font=("Courier New", 16, 'bold'))
+but2.place(x=10, y=170)
 
-but5=Button(me,padx=14,pady=14,bd=4,bg='white',command=lambda:clickbut(5),text="5",font=("Courier New",16,'bold'))
-but5.place(x=75,y=170)
+but3 = Button(me, padx=14, pady=14, bd=4, bg='white', command=lambda: clickbut(3), text="3",
+              font=("Courier New", 16, 'bold'))
+but3.place(x=10, y=240)
 
-but6=Button(me,padx=14,pady=14,bd=4,bg='white',command=lambda:clickbut(6),text="6",font=("Courier New",16,'bold'))
-but6.place(x=75,y=240)
+but4 = Button(me, padx=14, pady=14, bd=4, bg='white', command=lambda: clickbut(4), text="4",
+              font=("Courier New", 16, 'bold'))
+but4.place(x=75, y=100)
 
-but7=Button(me,padx=14,pady=14,bd=4,bg='white',command=lambda:clickbut(7),text="7",font=("Courier New",16,'bold'))
-but7.place(x=140,y=100)
+but5 = Button(me, padx=14, pady=14, bd=4, bg='white', command=lambda: clickbut(5), text="5",
+              font=("Courier New", 16, 'bold'))
+but5.place(x=75, y=170)
 
-but8=Button(me,padx=14,pady=14,bd=4,bg='white',command=lambda:clickbut(8),text="8",font=("Courier New",16,'bold'))
-but8.place(x=140,y=170)
+but6 = Button(me, padx=14, pady=14, bd=4, bg='white', command=lambda: clickbut(6), text="6",
+              font=("Courier New", 16, 'bold'))
+but6.place(x=75, y=240)
 
-but9=Button(me,padx=14,pady=14,bd=4,bg='white',command=lambda:clickbut(9),text="9",font=("Courier New",16,'bold'))
-but9.place(x=140,y=240)
+but7 = Button(me, padx=14, pady=14, bd=4, bg='white', command=lambda: clickbut(7), text="7",
+              font=("Courier New", 16, 'bold'))
+but7.place(x=140, y=100)
 
-but0=Button(me,padx=14,pady=14,bd=4,bg='white',command=lambda:clickbut(0),text="0",font=("Courier New",16,'bold'))
-but0.place(x=10,y=310)
+but8 = Button(me, padx=14, pady=14, bd=4, bg='white', command=lambda: clickbut(8), text="8",
+              font=("Courier New", 16, 'bold'))
+but8.place(x=140, y=170)
 
-butdot=Button(me,padx=47,pady=14,bd=4,bg='white',command=lambda:clickbut("."),text=".",font=("Courier New",16,'bold'))
-butdot.place(x=75,y=310)
+but9 = Button(me, padx=14, pady=14, bd=4, bg='white', command=lambda: clickbut(9), text="9",
+              font=("Courier New", 16, 'bold'))
+but9.place(x=140, y=240)
 
-butpl=Button(me,padx=14,pady=14,bd=4,bg='white',text="+",command=lambda:clickbut("+"),font=("Courier New",16,'bold'))
-butpl.place(x=205,y=100)
+but0 = Button(me, padx=14, pady=14, bd=4, bg='white', command=lambda: clickbut(0), text="0",
+              font=("Courier New", 16, 'bold'))
+but0.place(x=10, y=310)
 
-butsub=Button(me,padx=14,pady=14,bd=4,bg='white',text="-",command=lambda:clickbut("-"),font=("Courier New",16,'bold'))
-butsub.place(x=205,y=170)
+butdot = Button(me, padx=47, pady=14, bd=4, bg='white', command=lambda: clickbut("."), text=".",
+                font=("Courier New", 16, 'bold'))
+butdot.place(x=75, y=310)
 
-butml=Button(me,padx=14,pady=14,bd=4,bg='white',text="*",command=lambda:clickbut("*"),font=("Courier New",16,'bold'))
-butml.place(x=205,y=240)
+butpl = Button(me, padx=14, pady=14, bd=4, bg='white', text="+", command=lambda: clickbut("+"),
+               font=("Courier New", 16, 'bold'))
+butpl.place(x=205, y=100)
 
-butdiv=Button(me,padx=14,pady=14,bd=4,bg='white',text="/",command=lambda:clickbut("/"),font=("Courier New",16,'bold'))
-butdiv.place(x=205,y=310)
+butsub = Button(me, padx=14, pady=14, bd=4, bg='white', text="-", command=lambda: clickbut("-"),
+                font=("Courier New", 16, 'bold'))
+butsub.place(x=205, y=170)
 
-butclear=Button(me,padx=14,pady=119,bd=4,bg='white',text="CE",command=clrbut,font=("Courier New",16,'bold'))
-butclear.place(x=270,y=100)
+butml = Button(me, padx=14, pady=14, bd=4, bg='white', text="*", command=lambda: clickbut("*"),
+               font=("Courier New", 16, 'bold'))
+butml.place(x=205, y=240)
 
-butequal=Button(me,padx=151,pady=14,bd=4,bg='white',command=equlbut,text="=",font=("Courier New",16,'bold'))
-butequal.place(x=10,y=380)
-me.mainloop()
+butdiv = Button(me, padx=14, pady=14, bd=4, bg='white', text="/", command=lambda: clickbut("/"),
+                font=("Courier New", 16, 'bold'))
+butdiv.place(x=205, y=310)
 
+butclear = Button(me, padx=14, pady=119, bd=4, bg='white', text="CE", command=clrbut, font=("Courier New", 16, 'bold'))
+butclear.place(x=270, y=100)
 
+butequal = Button(me, padx=151, pady=14, bd=4, bg='white', command=equlbut, text="=", font=("Courier New", 16, 'bold'))
+butequal.place(x=10, y=380)
+me.mainloop()