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from lru import *
def _selftest():
class simplelrucache:
def __init__(self, size):
self.size = size
self.length = 0
self.items = []
def __contains__(self, key):
for x in self.items:
if x[0] == key:
return True
return False
class simplelrucache:
def __init__(self, size):
# Initialize the cache as empty.
self.cache = []
self.size = size
def __contains__(self, key):
for x in self.cache:
if x[0] == key:
return True
return False
def __getitem__(self, key):
for i in range(len(self.cache)):
x = self.cache[i]
if x[0] == key:
del self.cache[i]
self.cache.append(x)
return x[1]
assert False
def __setitem__(self, key, obj):
for i in range(len(self.cache)):
x = self.cache[i]
if x[0] == key:
x[1] = obj
del self.cache[i]
self.cache.append(x)
return
if len(self.cache) == self.size:
self.cache = self.cache[1:]
self.cache.append([key, obj])
return
def __delitem__(self, key):
for i in range(len(self.cache)):
if self.cache[i][0] == key:
del self.cache[i]
return
return
def testa():
a = lrucache(16)
for i in range(len(vect)):
a[vect[i]] = 0
def testb():
a = simplelrucache(16)
for i in range(len(vect)):
a[vect[i]] = 0
def wraptest():
import random
q = dict()
x = lruwrap(q, 32)
for i in range(256):
a = random.randint(0, 256)
b = random.randint(0, 256)
x[a] = b
for i in range(512):
a = random.randint(0, 256)
tmp1 = None
tmp2 = None
try:
tmp1 = x[a]
except KeyError:
tmp1 = None
try:
tmp2 = q[a]
except KeyError:
tmp2 = None
assert tmp1 == tmp2
def wraptest2():
import random
q = dict()
x = lruwrap(q, 32, True)
for i in range(256):
a = random.randint(0, 256)
b = random.randint(0, 256)
x[a] = b
x.sync()
for i in range(512):
a = random.randint(0, 256)
tmp1 = None
tmp2 = None
try:
tmp1 = x[a]
except KeyError:
tmp1 = None
try:
tmp2 = q[a]
except KeyError:
tmp2 = None
assert tmp1 == tmp2
def wraptest3():
import random
q = dict()
with lruwrap(q, 32, True) as x:
for i in range(256):
a = random.randint(0, 256)
b = random.randint(0, 256)
x[a] = b
for i in range(512):
a = random.randint(0, 256)
tmp1 = None
tmp2 = None
try:
tmp1 = x[a]
except KeyError:
tmp1 = None
try:
tmp2 = q[a]
except KeyError:
tmp2 = None
assert tmp1 == tmp2
@lrudecorator(14)
def cube(x):
return x*x*x
if __name__ == '__main__':
import random
wraptest()
wraptest2()
wraptest3()
for i in range(300):
x = random.randint(0, 25)
assert cube(x) == x**3
a = lrucache(20)
b = simplelrucache(20)
for i in range(256):
x = random.randint(0, 256)
y = random.randint(0, 256)
a[x] = y
b[x] = y
q = []
z = a.head
for j in range(len(a.table)):
q.append([z.key, z.obj])
z = z.next
if q != b.cache[::-1]:
print i
print b.cache[::-1]
print q
print a.table.keys()
assert False
from timeit import Timer
import random
global vect
vect = []
for i in range(1000000):
vect.append(random.randint(0, 1000))
t = Timer("testa()", "from __main__ import testa")
print t.timeit(1)
t = Timer("testb()", "from __main__ import testb")
print t.timeit(1)
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