Menu()
    Function that show options to Log In as a Customer or an Owner or to Exit the program.

OwnerMenu()
    Function that shows a Menu to select options from for the Owner of the Store.

database_connector()
    Function that Returns an Connection Object that connects Python to MySQL.

class Owner(builtins.object)
 |  Owner(name)
 |
 |  Class for Object of type 'Owner'. Contains all the functions accessible by an Owner.
 |
 |  Methods defined here:
 |
 |  P_Invoice(self)
 |      Function to make Purchase for New Stock.
 |
 |  Show_Customers(self)
 |      Function that prints Customers table from Database.
 |
 |  Show_Owners(self)
 |      Function that prints Owners Table from Database.
 |
 |  __init__(self, name)
 |      Function to initiate an Owner and add it to the Owners table if it doesn't exist.
 |
 |  account(self)
 |      Function that prints the Amount in selected Owners Account.
 |
 |  addCustomer(self, name)
 |      Function to add a New Customer to Customers Table.
 |
 |  delete_item(self)
 |      Function to Delete Items from the Stock Table.
 |
 |  ----------------------------------------------------------------------
 |  Static methods defined here:
 |
 |  ItemIsThere(sr='', name='')
 |      Static Function to search for an Item using it's Sr. No. or Name. Return True/False.
 |
 |  Stock_Report()
 |      Static Funtion to print the Stock Report.

class Customer(builtins.object)
 |  Customer(name)
 |
 |  Class for an Object of type 'Customer'. Contains all the functions accessible by a Customer.
 |
 |  Methods defined here:
 |
 |  S_Invoice(self)
 |      Function to generate a Sales Invoice for a Customer. Asks for items to be purchased from Customer and Prints Invoice.        
 |
 |  __init__(self, name)
 |      Function to initiate a Customer and add it to Customers Table if it doesn't exist.
 |
 |  payBill(self)
 |      Function to settle accounts by paying the outstanding bill.
 |
 |  printInvoice(self)
 |      Function to print the Sales Ivoice.
 |
 |  ----------------------------------------------------------------------
 |  Static methods defined here:
 |
 |  search_item(name)
 |      Static Function to search if a given item is there in stock or not.