Generate a sample string (bonus coupon) from string functions and removing misguiding characters from the final list:

def generate_coupon(coupon_code_length=10):
     alphanum = list(string.ascii_uppercase + string.digits)
     alphanum.remove('L')
     alphanum.remove('I')
     alphanum.remove('1')
     alphanum.remove('0')
     alphanum.remove('O')

     return ''.join(random.choice(alphanum) for i in range(coupon_code_length))

This function returns a random string from ascii_uppercase and string.digits. This is one usages out of very many usages of string module public variables. :)

GET THE IDEA!

#python #string #ascii_uppercase #digits #random #random_choice #range

In order to get a random document from MongoDB collection you can use aggregate framework:

db.users.aggregate(    [ { $sample: { size: 1 } } ] )

NOTE: MongoDB 3.2 introduced $sample to the aggregation pipeline.


Read more here: https://www.mongodb.com/blog/post/how-to-perform-random-queries-on-mongodb


This method is the fastest and most efficient way of getting random data from a huge database like 100 M records.

#mongodb #mongo #aggregate #sample #random