openstack/deb-python-cassandra-driver
Code Issues Proposed changes

move murmur3 tuple structures to namedtuples

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PYTHON-601
This commit is contained in:
Jim Witschey
2017-07-12 11:15:55 -04:00
parent c46f0995a9
commit 54ee58d43d
1 changed files with 11 additions and 8 deletions
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19
cassandra/murmur3.py
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@@ -1,8 +1,11 @@
from collections import namedtuple
import struct import struct
from six.moves import range from six.moves import range
BodyAndTail = namedtuple('BodyAndTail', ['body', 'tail', 'total_len'])
def body_and_tail(data): def body_and_tail(data):
l = len(data) l = len(data)
nblocks = l // 16 nblocks = l // 16
@@ -10,16 +13,16 @@ def body_and_tail(data):
if nblocks: if nblocks:
# we use '<', specifying little-endian byte order for data bigger than # we use '<', specifying little-endian byte order for data bigger than
# a byte so behavior is the same on little- and big-endian platforms # a byte so behavior is the same on little- and big-endian platforms
return ( return BodyAndTail(
struct.unpack_from('<' + ('qq' * nblocks), data), body=struct.unpack_from('<' + ('qq' * nblocks), data),
struct.unpack_from('b' * tail, data, -tail), tail=struct.unpack_from('b' * tail, data, -tail),
l total_len=l
) )
else: else:
return ( return BodyAndTail(
tuple(), body=tuple(),
struct.unpack_from('b' * tail, data, -tail), tail=struct.unpack_from('b' * tail, data, -tail),
l total_len=l
) )