A simple binary compression algorithm for ATGC sequence using python

gene_compression.py

"""
Name: Shrivats
Bit Compression of ATGC
"""

bit_seq = 0

input_seq = 'ATGC'
input_seq+='GTAC'
# input sequence
def binary(input):
    print '{0:08b}'.format(x)

x=0
counter = 0
binaryRep = []
for code in input_seq:
    print code

    if 'A' is code:
        x|=0
    elif 'T' is code:
        x|=1
    elif 'G' is code:
        x|=2
    elif 'C' is code:
        x|=3
    counter+=1
    if counter < 4:
        x = x << 2
    elif counter == 4:
        binary(x)
        binaryRep.append(x)
        counter =0
        x = 0