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Python Set Operations Explained: From Theory to Real-Time Applications

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A  set  in Python is an unordered collection of unique elements. It is useful when storing distinct values and performing operations like union, intersection, or difference. Real-Time Example: Removing Duplicate Customer Emails in a Marketing Campaign Imagine you are working on an email marketing campaign for your company. You have a list of customer emails, but some are duplicated. Using a set , you can remove duplicates efficiently before sending emails. Code Example: # List of customer emails (some duplicates) customer_emails = [ "alice@example.com" , "bob@example.com" , "charlie@example.com" , "alice@example.com" , "david@example.com" , "bob@example.com" ] # Convert list to a set to remove duplicates unique_emails = set (customer_emails) # Convert back to a list (if needed) unique_email_list = list (unique_emails) # Print the unique emails print ( "Unique customer emails:" , unique_email_list) Ou...
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How does Marchant Initiate Voice Authentication When Card Not Present

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Voice transaction is a method to pay the bills for a merchant at POS. The scenario is when you visit a Retailer where you purchased for Rs1000. You forgot to carry a card (Card is not present) with you but you remember card details. Then you can ask the merchant to use Voice authentication for completing the payment.


Credit Cards Domain: How Voice Transaction Works

About Voice Authentication

  1. After you start the call, the first step is you need to enter the merchant id. Usually, your Call goes to Card Issuer.
  2. Then you need to select an option like you are doing a transaction for the Credit card.
  3. You need to enter your card number and expiry date.
  4. Select the option for Card present or Card not present.
  5. Enter the amount you need to pay.
  6. Then Card issuer's call center provides you a 6 digit approval code. You need to tell the approval code to the merchant, and the merchant also will get a message. Then the merchant completes the transaction using the Voice approval code.

Notes: Sometimes Merchant Service provider also facilitates to get Voice authorization approval.

How Merchant gets Funds

  1. After the merchant gets an approval code from the customer, he has to enter customer details into the Merchant service provider system.
  2. A merchant also would need to enter the approval code.
  3. Merchant will submit the transactions to the service provider. So that the merchant will receive funds.

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