import bz2
import mmap

lines = '''This is my first line
This is the second
And the third
'''

with open("bz2TestFile", "wb") as f:
    f.write(bz2.compress(lines))

with open("bz2TestFile", "rb") as f:
    mapped = mmap.mmap(f.fileno(), 0, prot=mmap.PROT_READ)

    print "Part of MMAPPED"
    # This does not work until I hit a minimum length
    # due to (I believe) the checksums in the bz2 algorithm
    #
    for x in range(len(mapped)+2):
        line = mapped[0:x]
        try:
            print x
            print bz2.decompress(line)
        except:
            pass

# I can decompress the entire mmapped file
print ":entire mmap file:"
print bz2.decompress(mapped)

# I can create a bz2File object from the file path
# Is there a way to map the mmap object to this function?
print ":BZ2 File readline:"
bzF = bz2.BZ2File("bz2TestFile")

# Seek to specific offset
bzF.seek(22)
# Read the data
print bzF.readline()