gistfile1.txt

#!/usr/bin/env python
# By Chris Hunter
import random
import re

##
# getRandomSamplingOfEmails
# Returns a deduplicated random set of n length from a given m set of emails
# Uses regex to test for email address
# Safe for n less than 0, greater than length of given mSet
# {list} mSet
# {int} n
def getRandomSamplingOfEmails(mSet, n):
    rndSet = []
    n = n if(n > 0) else 0
    if len(mSet) > 0:
        while len(rndSet) < n:
            rndN = random.randint(0, len(mSet)-1)
            val = mSet.pop(rndN)
            if(re.match("^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$", val)):
                rndSet.append(val)
            if(len(mSet)==0):
                break
    
    return rndSet


# run it.
def main():
    nEmails = 3
    mEmails = ["a@a.com", "b@a.com", "c@a.com", "notAnEmail", "garbage", "a@b.com", "b@b.com", "c@b.com"]
    print(getRandomSamplingOfEmails(mEmails, nEmails))


if __name__ == "__main__":
    main()