Считывание бинарного файла в виде нулей и единиц

"%08i" % int(bin(ord('CHAR'))[2:])

Python 3.2.3 (default, Oct 19 2012, 19:53:57) 
[GCC 4.7.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> f = open("file", "rb").read()
>>> f
b'\x89PNG\r\n\x1a\n\x00\x00\x00\rIHDR\x00\x00\x00\x18\x00\x00\x00\x18\x08\x06\x00\x00\x00\xe0w=\xf8\x00\x00\x04\xc3IDATx\xda\xa5\x95{P\x94U\x18\xc6#\xd0LED \x8c\x16A\x04\xba\x89d\x80"\x06\xec\xda:\xa9\x85\xe4TvE\xb2\x9c)\xcaf\x84
....

for s in "\x25PNG":
    print bin(ord(s))

def write_bin(path, STRING):
    DECODED_STRING = ""
    with open(path, "wb") as OUT_FILE:
        for i in range(0, len(STRING)):
            DECODED_STRING = DECODED_STRING + chr(int(STRING[i], 2))
        OUT_FILE.write(bytes(DECODED_STRING, "UTF-8"))

from array import array
from functools import partial
 
STRING = ['00101100', '10010111', ...
 
basetwo = partial(int, base=2)
data = array("B", map(basetwo, STRING))
with open(path, "wb") as OUT_FILE:
    data.tofile(OUT_FILE)

# байты файла в двоичном виде можно так получить
with open(source, "rb") as fin:
    BINDATA = list(map("{:08b}".format, map(ord, f)))

>>> f = open('/etc/passwd', 'rb')
>>> next(f)
b'root:x:0:0:root:/root:/bin/bash\n'
>>> f.close()
>>>

with open(source, "rb") as fin:
    tmp = array("B")
    tmp.fromfile(fin)
    BINDATA = list(map("{:08b}".format, tmp))

>>> f = open('/etc/passwd', 'rb')
>>> s = next(f)
>>> s
b'root:x:0:0:root:/root:/bin/bash\n'
>>> s[0]
114
>>> f.close()
>>>