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lZ ej2 de Y bw xY w)a3 hashlib module - A common interface to many hash functions.
new(name, data=b'', **kwargs) - returns a new hash object implementing the
given hash function; initializing the hash
using the given binary data.
Named constructor functions are also available, these are faster
than using new(name):
md5(), sha1(), sha224(), sha256(), sha384(), sha512(), blake2b(), blake2s(),
sha3_224, sha3_256, sha3_384, sha3_512, shake_128, and shake_256.
More algorithms may be available on your platform but the above are guaranteed
to exist. See the algorithms_guaranteed and algorithms_available attributes
to find out what algorithm names can be passed to new().
NOTE: If you want the adler32 or crc32 hash functions they are available in
the zlib module.
Choose your hash function wisely. Some have known collision weaknesses.
sha384 and sha512 will be slow on 32 bit platforms.
Hash objects have these methods:
- update(data): Update the hash object with the bytes in data. Repeated calls
are equivalent to a single call with the concatenation of all
the arguments.
- digest(): Return the digest of the bytes passed to the update() method
so far as a bytes object.
- hexdigest(): Like digest() except the digest is returned as a string
of double length, containing only hexadecimal digits.
- copy(): Return a copy (clone) of the hash object. This can be used to
efficiently compute the digests of datas that share a common
initial substring.
For example, to obtain the digest of the byte string 'Nobody inspects the
spammish repetition':
>>> import hashlib
>>> m = hashlib.md5()
>>> m.update(b"Nobody inspects")
>>> m.update(b" the spammish repetition")
>>> m.digest()
b'\xbbd\x9c\x83\xdd\x1e\xa5\xc9\xd9\xde\xc9\xa1\x8d\xf0\xff\xe9'
More condensed:
>>> hashlib.sha224(b"Nobody inspects the spammish repetition").hexdigest()
'a4337bc45a8fc544c03f52dc550cd6e1e87021bc896588bd79e901e2'
)md5sha1sha224sha256sha384sha512blake2bblake2ssha3_224sha3_256sha3_384sha3_512 shake_128 shake_256)newalgorithms_guaranteedalgorithms_available file_digestr r c t }|j | }||S | dv rdd l}|j x|d< |d< n| dv rdd l}|j
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st d| d t | }t | } | j | }|dk( r |S |j |d| .)a Hash the contents of a file-like object. Returns a digest object.
*fileobj* must be a file-like object opened for reading in binary mode.
It accepts file objects from open(), io.BytesIO(), and SocketIO objects.
The function may bypass Python's I/O and use the file descriptor *fileno*
directly.
*digest* must either be a hash algorithm name as a *str*, a hash
constructor, or a callable that returns a hash object.
getbufferreadintoreadable'z3' is not a file-like object in binary reading mode.r N)
isinstancestrr hasattrupdater? rA r$ bytearray
memoryviewr@ )fileobjdigestr= digestobjbufviewsizes r( r r s &# K H w $**,- $ GZ ( {M N
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