def lambda_handler(event, context): #interface handler. try: #response_object. response_obj = Response() #Extract and validate the collection containing the customer data. customer_data = event.get("data") is_valid = response_obj.request_parser(customer_data) #Exit_point: failure, no data to process. if not is_valid: return response_obj.error_response("data", "path", "data empty", "no customer data to pocss", 404, "client error", "", "in_valid customer data") #customer object. cust_obj = Customer() #Iterate over all the customer data. for curr_customer in customer_data: #check_validity. isCustomerValid = cust_obj.check_validity(curr_customer) #build Invalid customer list. if not isCustomerValid: # add the inValid customer to the inValidCustomerList. cust_obj.add_invalid_list(curr_customer) #build unique_id. unique_cus_id = cust_obj.build_unique_id(curr_customer) #build the duplicate list. cust_obj.validate_duplicate_customer(curr_customer, unique_cus_id) #build the in_valid set. inValid_customers = cust_obj.merge_inVaid_duplicate_customer_set() #print the invalid customers. for customer in inValid_customers: print(customer) return response_obj.success_response(200, "invalid_customers_marked") except: traceback.print_exc() return response_obj.exception_response( "invalid_data in the request payload")