Not Working filter search using python and mysql

Question

It is showing me no record after writing the 1. I have data on my database for 1. Can someone please help me to know where I am wrong here?

    def searchDB():
        try:
           sqlCon = mysql.connect(host="localhost",user="root",password="*********",database="mydatabase") 
           cur =sqlCon.cursor ()
           cur.execute ("select categoryname from category where "+ str(searchby.get())+ "Like '%" + str(search.get()) + "Like '%'")
           result = cur.fetchall ()
           if len(result) !=0:
              self.category_records.delete(*self.category_records.get_children())
              for row in result:
                  self.category_records.insert('',END,values =row)
           sqlCon.commit()
           sqlCon.close()
          
     
        except:
           tkinter.messagebox.showinfo("Data Search Form", "No such record Found")
           Reset()

        sqlCon.close()