Reibello AoC 16

safe_input = "00111101111101000"
disk_length_a = 272
disk_length = 35651584

data = "00111101111101000"

test_input = '1'
test_length = 12

def dragon(s):
    '''
    '''
    a = s #let the data we have be a
    b = ''
    for i in range(1, len(a)+1):
      if a[-i] == '0':
        b += '1'
      else:
        b += '0'
    return a+'0'+b

def create_checksum(s):
    checksum = ''
    for i in range(0,len(s),2):
        #print(i)
        if s[i] == s[i+1]:
            checksum += '1'
        else:
            checksum += '0'
        #print(checksum)
    if len(checksum) % 2 == 0:
        return create_checksum(checksum)
    else:
        print(checksum)
        return checksum

while len(data) < disk_length:
    data = dragon(data)

if len(data) > disk_length:
    data = data[:disk_length]

cs = create_checksum(data)