Create hidden message in lowercase.

riddleit.py

"""
Create hidden message in lowercase.
"""
import string
import random


def random_text(size):
    chars = string.ascii_uppercase + string.ascii_lowercase + string.punctuation + string.digits
    return ''.join([random.choice(chars) for i in xrange(size)])


def riddleit(secret):
    message = []
    secret = ''.join(secret.split()).lower()

    for ch in secret:
        message.append(random_text(random.randint(100, 400)).upper())
        message.append(ch)

    message.append(random_text(random.randint(100, 400)).upper())
    return ''.join(message)