diff --git a/CONTACT_BOOK_APPLICATION/contact book application.py b/CONTACT_BOOK_APPLICATION/contact book application.py
index c74243a..ad63529 100644
--- a/CONTACT_BOOK_APPLICATION/contact book application.py	
+++ b/CONTACT_BOOK_APPLICATION/contact book application.py	
@@ -1,134 +1,155 @@
 from tkinter import *
 import sqlite3
 
-root=Tk()
-root.geometry('410x450')
+root = Tk()
+root.geometry("410x450")
 root.title("DataBase using Sqlite3 and Tkinter")
 root.configure(background="powder blue")
 
-textin=StringVar()
-textinn=StringVar()
+textin = StringVar()
+textinn = StringVar()
 
-menu=Menu(root)
+menu = Menu(root)
 root.config(menu=menu)
 
 menu = Menu(root)
 root.config(menu=menu)
 
+
 def helpp():
-   help(sqlite3)
+    help(sqlite3)
 
-subm = Menu(menu)
-menu.add_cascade(label="Help",menu=subm)
-subm.add_command(label="Sqlite3 Docs",command=helpp)
 
+subm = Menu(menu)
+menu.add_cascade(label="Help", menu=subm)
+subm.add_command(label="Sqlite3 Docs", command=helpp)
 
 
-db = sqlite3.connect('mysq.db')
+db = sqlite3.connect("mysq.db")
 cursor = db.cursor()
 cursor.execute("CREATE TABLE IF NOT EXISTS people(name TEXT, phone TEXT)")
 db.commit()
 
-lab=Label(root,text='Name:',font=('none 13 bold'))
-lab.place(x=0,y=0)
+lab = Label(root, text="Name:", font=("none 13 bold"))
+lab.place(x=0, y=0)
 
-entname=Entry(root,width=20,font=('none 13 bold'),textvar=textin)
-entname.place(x=80,y=0)
+entname = Entry(root, width=20, font=("none 13 bold"), textvar=textin)
+entname.place(x=80, y=0)
 
-entphone=Entry(root,width=20,font=('none 13 bold'),textvar=textinn)
-entphone.place(x=80,y=40)
+entphone = Entry(root, width=20, font=("none 13 bold"), textvar=textinn)
+entphone.place(x=80, y=40)
+
+lab1 = Label(root, text="Phone:", font=("none 13 bold"))
+lab1.place(x=0, y=40)
 
-lab1=Label(root,text='Phone:',font=('none 13 bold'))
-lab1.place(x=0,y=40)
 
 def insert():
-   
-   name1 = textin.get()
-   phone1 = textinn.get()
-   conn = sqlite3.connect('mysq.db')
-   with conn:
-      cursor = conn.cursor()
-      cursor.execute('INSERT INTO people(name, phone) VALUES(?,?)',(name1, phone1,))
-      db.close()
-   
+
+    name1 = textin.get()
+    phone1 = textinn.get()
+    conn = sqlite3.connect("mysq.db")
+    with conn:
+        cursor = conn.cursor()
+        cursor.execute(
+            "INSERT INTO people(name, phone) VALUES(?,?)",
+            (
+                name1,
+                phone1,
+            ),
+        )
+        db.close()
+
 
 def show():
-   connt = sqlite3.connect('mysq.db')
-   cursor = connt.cursor()
-   cursor.execute('SELECT * FROM people')
-   for row in cursor.fetchall():
-      print(row)
+    connt = sqlite3.connect("mysq.db")
+    cursor = connt.cursor()
+    cursor.execute("SELECT * FROM people")
+    for row in cursor.fetchall():
+        print(row)
 
 
+name = StringVar()
+phone = StringVar()
 
 
-name=StringVar()
-phone=StringVar()
 def updateContact():
-   nam=name.get()
-   ph=phone.get()
-  
-   
-   connnt=sqlite3.connect('mysq.db')
-   cursor = connnt.cursor()
-   cursor.execute("UPDATE people SET name = ? WHERE phone = ?",(nam,ph))
-   connnt.commit()
-
-dell=StringVar()
+    nam = name.get()
+    ph = phone.get()
+
+    connnt = sqlite3.connect("mysq.db")
+    cursor = connnt.cursor()
+    cursor.execute("UPDATE people SET name = ? WHERE phone = ?", (nam, ph))
+    connnt.commit()
+
+
+dell = StringVar()
+
+
 def det():
-   dee=dell.get()
-   connnt=sqlite3.connect('mysq.db')
-   cursor = connnt.cursor()
-   cursor.execute("DELETE FROM people WHERE name = ?",(dee,))
-   connnt.commit()
+    dee = dell.get()
+    connnt = sqlite3.connect("mysq.db")
+    cursor = connnt.cursor()
+    cursor.execute("DELETE FROM people WHERE name = ?", (dee,))
+    connnt.commit()
 
-   
- 
 
 def drop():
-   connnt=sqlite3.connect('mysq.db')
-   cursor = connnt.cursor()
-   cursor.execute("DROP table people")
-   connnt.commit()
-   
+    connnt = sqlite3.connect("mysq.db")
+    cursor = connnt.cursor()
+    cursor.execute("DROP table people")
+    connnt.commit()
+
+
+buttdrop = Button(
+    root,
+    padx=2,
+    pady=2,
+    text="Drop table",
+    command=drop,
+    font=("none 13 bold"),
+    relief="raise",
+)
+buttdrop.place(x=180, y=380)
 
-   
-   
-buttdrop=Button(root,padx=2,pady=2,text='Drop table',command=drop,font=('none 13 bold'),relief='raise')
-buttdrop.place(x=180,y=380)
+buttupdate = Button(
+    root,
+    padx=2,
+    pady=2,
+    text="Update",
+    command=updateContact,
+    font=("none 13 bold"),
+    relief="raise",
+)
+buttupdate.place(x=80, y=280)
 
-buttupdate=Button(root,padx=2,pady=2,text='Update',command=updateContact,font=('none 13 bold'),relief='raise')
-buttupdate.place(x=80,y=280)
-      
-labuname=Label(root,text='Update Name :',font=('none 13 bold'))
-labuname.place(x=0,y=200)
+labuname = Label(root, text="Update Name :", font=("none 13 bold"))
+labuname.place(x=0, y=200)
 
-enttupadtename=Entry(root,width=20,font=('none 13 bold'),textvar=name)
-enttupadtename.place(x=160,y=200)
+enttupadtename = Entry(root, width=20, font=("none 13 bold"), textvar=name)
+enttupadtename.place(x=160, y=200)
 
-labuphone=Label(root,text='Provide Phone No. :',font=('none 13 bold'))
-labuphone.place(x=0,y=240)
+labuphone = Label(root, text="Provide Phone No. :", font=("none 13 bold"))
+labuphone.place(x=0, y=240)
 
-entupdatephone=Entry(root,width=20,font=('none 13 bold'),textvar=phone)
-entupdatephone.place(x=210,y=240)
+entupdatephone = Entry(root, width=20, font=("none 13 bold"), textvar=phone)
+entupdatephone.place(x=210, y=240)
 
-labdelete=Label(root,text='Delete :',font=('none 13 bold'))
-labdelete.place(x=0,y=340)
+labdelete = Label(root, text="Delete :", font=("none 13 bold"))
+labdelete.place(x=0, y=340)
 
-endelete=Entry(root,width=20,textvar=dell,font=('none 13 bold'))
-endelete.place(x=90,y=340)
+endelete = Entry(root, width=20, textvar=dell, font=("none 13 bold"))
+endelete.place(x=90, y=340)
 
 
-butdel=Button(root,padx=2,pady=2,text='Delete',command=det,font=('none 13 bold'))
-butdel.place(x=90,y=380)
-    
+butdel = Button(root, padx=2, pady=2, text="Delete", command=det, font=("none 13 bold"))
+butdel.place(x=90, y=380)
 
-but=Button(root,padx=2,pady=2,text='Submit',command=insert,font=('none 13 bold'))
-but.place(x=60,y=100)
 
-res=Button(root,padx=2,pady=2,text='Show',command=show,font=('none 13 bold'))
-res.place(x=160,y=100)
+but = Button(root, padx=2, pady=2, text="Submit", command=insert, font=("none 13 bold"))
+but.place(x=60, y=100)
 
+res = Button(root, padx=2, pady=2, text="Show", command=show, font=("none 13 bold"))
+res.place(x=160, y=100)
 
 
 root.mainloop()