def test_rho(self):
self.assertEqual(get_rho(0, 32), 33)
self.assertEqual(get_rho(1, 32), 32)
self.assertEqual(get_rho(2, 32), 31)
self.assertEqual(get_rho(3, 32), 31)
self.assertEqual(get_rho(4, 32), 30)
self.assertEqual(get_rho(5, 32), 30)
self.assertEqual(get_rho(6, 32), 30)
self.assertEqual(get_rho(7, 32), 30)
self.assertEqual(get_rho(1 << 31, 32), 1)
self.assertRaises(ValueError, get_rho, 1 << 32, 32)
def test_rho(self):
self.assertEqual(get_rho(0, 32), 33)
self.assertEqual(get_rho(1, 32), 32)
self.assertEqual(get_rho(2, 32), 31)
self.assertEqual(get_rho(3, 32), 31)
self.assertEqual(get_rho(4, 32), 30)
self.assertEqual(get_rho(5, 32), 30)
self.assertEqual(get_rho(6, 32), 30)
self.assertEqual(get_rho(7, 32), 30)
self.assertEqual(get_rho(1 << 31, 32), 1)
self.assertRaises(ValueError, get_rho, 1 << 32, 32)
def add(self, timestamp, value):
"""
Adds the item to the HyperLogLog
"""
# h: D -> {0,1} ** 64
# x = h(v)
# j = <x_0x_1..x_{p-1})>
# w = <x_{p}x_{p+1}..>
# <t_i, rho(w)>
x = long(sha1(value).hexdigest()[:16], 16)
j = x & (self.m - 1)
w = x >> self.p
R = get_rho(w, 64 - self.p)
Rmax = None
tmp = []
tmax = None
tmp2 = list(
heapq.merge(self.LPFM[j] if self.LPFM[j] is not None else [],
[(timestamp, R)]))
for t, R in reversed(tmp2):
if tmax is None:
tmax = t
if t < (tmax - self.window):
break
if R > Rmax:
tmp.append((t, R))
Rmax = R
tmp.reverse()
self.LPFM[j] = tuple(tmp) if tmp else None
def add(self, timestamp, value):
"""
Adds the item to the HyperLogLog
"""
# h: D -> {0,1} ** 64
# x = h(v)
# j = <x_0x_1..x_{p-1})>
# w = <x_{p}x_{p+1}..>
# <t_i, rho(w)>
x = long(sha1(value).hexdigest()[:16], 16)
j = x & (self.m - 1)
w = x >> self.p
R = get_rho(w, 64 - self.p)
Rmax = None
tmp = []
tmax = None
tmp2 = list(heapq.merge(self.LPFM[j] if self.LPFM[j] is not None else [], [(timestamp, R)]))
for t, R in reversed(tmp2):
if tmax is None:
tmax = t
if t < (tmax - self.window):
break
if R > Rmax:
tmp.append((t, R))
Rmax = R
tmp.reverse()
self.LPFM[j] = tuple(tmp) if tmp else None
def test_rho_emu(self):
import hll
old = hll.bit_length
hll.bit_length = hll.bit_length_emu
try:
self.assertEqual(get_rho(0, 32), 33)
self.assertEqual(get_rho(1, 32), 32)
self.assertEqual(get_rho(2, 32), 31)
self.assertEqual(get_rho(3, 32), 31)
self.assertEqual(get_rho(4, 32), 30)
self.assertEqual(get_rho(5, 32), 30)
self.assertEqual(get_rho(6, 32), 30)
self.assertEqual(get_rho(7, 32), 30)
self.assertEqual(get_rho(1 << 31, 32), 1)
self.assertRaises(ValueError, get_rho, 1 << 32, 32)
finally:
hll.bit_length = old
def test_rho_emu(self):
import hll
old = hll.bit_length
hll.bit_length = hll.bit_length_emu
try:
self.assertEqual(get_rho(0, 32), 33)
self.assertEqual(get_rho(1, 32), 32)
self.assertEqual(get_rho(2, 32), 31)
self.assertEqual(get_rho(3, 32), 31)
self.assertEqual(get_rho(4, 32), 30)
self.assertEqual(get_rho(5, 32), 30)
self.assertEqual(get_rho(6, 32), 30)
self.assertEqual(get_rho(7, 32), 30)
self.assertEqual(get_rho(1 << 31, 32), 1)
self.assertRaises(ValueError, get_rho, 1 << 32, 32)
finally:
hll.bit_length = old
