""" Purpose: introduce some another function from module random
"""

# by default the random module produces different interactions everytime we use it

import random 

random.seed( 'something different' )
# Seed function! Using the seed function, we can
# get the same random output for this seed
# each time!
# random.seed( s ) sets s as the seed for random output such that
# for that seed, you will always get the same random output.
    # INFLUENCE THE RANDOM OUTPUT
# In this example, '1112' was the seed. If we change the seed,
# then it will go back to being random and/or may produce different
# output for a different seed. Try changing the seed!
# Your seed can be anything like a string, number, etc.

# random function choice( seq ) when a given a sequence as a parameter returns
# a random element from the sequence

### get a string and choose four of its characters (repetition allowed)
s = input( "Enter a string: " )

i1 = random.choice( s )
i2 = random.choice( s )
i3 = random.choice( s )
i4 = random.choice( s )

print ()

print( "Four random characters from string", s, ": ", i1, i2, i3, i4 )

print ()

### get a list of words and choose four (repetition allowed)
reply = input( "Enter some words: " )

user_words  = reply.split()

# This example is random.choice using a list!
# The previous example was a string!
# SO RANDOM.CHOICE CHOOSES RANDOMLY FROM A SEQUENCE
    # random characters from a string
    # random elements from a list

w1 = random.choice( user_words )
w2 = random.choice( user_words )
w3 = random.choice( user_words )
w4 = random.choice( user_words )

print( "Four random words from list", user_words, ":",  w1, w2, w3, w4 )