''' Purpose: construct list of n base 2 digits for a user-supplied n
'''

import random # want random values, then we need the random module

# get the number of wanted bits
reply = input( 'How many bits: ' )

n = int( reply )

print()
                                
# create an empty list of bits

bits = []               # start off with an empty list

# add n random 0/1's to bits
# If we have examples where we're looping through sequences, strings,
# summing numbers up, etc., we can see we use the loop variable in the loop
# but it kindaaaa depends on the problem when we use the loop variable value
# it matters if we're using the loop variable values (the smaller
# parts of the sequence) or not so there's no definitive time we do vs.
# don't use a loop variable in a for loop body..

for i in range( 0, n ) :   # i is the iterator # 0 to n and 1 to n + 1
    # In this example,                                            is the same # of times
    # i is just used to say "I want to do this this many times - this many
    # iterations" i=0 i=1 i=2 THREE TIMES (I'm just doing it this many times)

    # each iteration want to add another bit to the list of bits

    # get the next bit

    bit = random.randrange(0,2) # randrange(2) also works! [0,2) -> 0,1s

    # append the bit to the list of bits so far

    bits.append( bit )   # .append() is the function to add something into a list
                       # if you have a list you cant do list_name + ...
                       # to add something into a list just do
                        # list_name.append(whatiwannaputinit)

# print bits 
print( bits )