• MasterCard
• Visa
• Diners
• Amex

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First I took “Name” and “Country” into consideration to find out the repeat customers. But there could be two person with same name and same city. So this time I took “Name” and “City”, and found out that there are no repeat customers.

Technical Definition:

  df.groupby('Name')['City'].value_counts(ascending=False)

As the value_counts() function of the above line is returning no value greater than 1, it shows that every customer, even if they have same name, have bought product only once. So it means there are no repeat customers in this span of time.

• Due Date: Between April 22 - April 26, 2018.