def test00(self):
"""Testing vtable creation from a tuple of btables (single row)"""
N = int(1e1)
t1 = blz.fromiter(((i, i*2.) for i in xrange(N)), dtype='i4,f8',
count=N, rootdir=self.rootdir)
t2 = blz.fromiter(((i, i*3.) for i in xrange(N*2)), dtype='i4,f8',
count=N*2, rootdir=self.rootdir)
vt = blz.vtable((t1, t2), rootdir=self.rootdir)
r = np.array([(1, 3.)], dtype='i4,f8')[0]
assert_array_equal(vt[N+1], r, "vtable values are not correct")
def test01b(self):
"""vtable from a collection of differently sized btables"""
N = int(1e1)
t1 = blz.fromiter(((i, i*2.) for i in xrange(N+1)),
dtype='i4,f8', count=N+1, rootdir=self.rootdir)
t2 = blz.fromiter(((i, i*2.) for i in xrange(N+1, N*2)),
dtype='i4,f8', count=N-1, rootdir=self.rootdir)
vt = blz.vtable((t1, t2), rootdir=self.rootdir)
ra = np.fromiter(((i, i*2.) for i in xrange(N*2)), dtype='i4,f8')
assert_array_equal(vt[:], ra, "vtable values are not correct")
def test02a(self):
"""vtable with start"""
N = int(1e1)
t1 = blz.fromiter(((i, i*2.) for i in xrange(N+1)),
dtype='i4,f8', count=N+1, rootdir=self.rootdir)
t2 = blz.fromiter(((i, i*2.) for i in xrange(N+1, N*2)),
dtype='i4,f8', count=N-1, rootdir=self.rootdir)
t3 = blz.fromiter(((i, i*2.) for i in xrange(N*2, N*3)),
dtype='i4,f8', count=N, rootdir=self.rootdir)
vt = blz.vtable((t1, t2, t3), rootdir=self.rootdir)
ra = np.fromiter(((i, i*2.) for i in xrange(N*3)), dtype='i4,f8')
assert_array_equal(vt[2:], ra[2:], "vtable values are not correct")
def test04(self):
"""Testing `iter()` method with large zero arrays"""
a = np.zeros(1e4, dtype='f8')
b = blz.barray(a, chunklen=100, rootdir=self.rootdir)
c = blz.fromiter((v for v in b), dtype='f8', count=len(a))
#print "c ->", repr(c)
assert_array_equal(a, c[:], "iterator fails on zeros")
def test01b(self):
"""Testing fromiter (long iter, chunk is multiple of iter length)"""
N = 1e4
a = (i for i in xrange(int(N)))
b = blz.fromiter(a, dtype='f8', chunklen=1000, count=int(N))
c = np.arange(N)
assert_array_equal(b[:], c, "fromiter does not work correctly")
def test01a(self):
"""Testing fromiter (long iter)"""
N = 1e4
a = (i for i in xrange(int(N)))
b = blz.fromiter(a, dtype='f8', count=int(N))
c = np.arange(N)
assert_array_equal(b[:], c, "fromiter does not work correctly")
def test07(self):
"""Testing `iter()` method with `limit` and `skip`"""
a = np.arange(1e4, dtype='f8')
b = blz.barray(a, chunklen=100, rootdir=self.rootdir)
c = blz.fromiter((v for v in b.iter(limit=1010, skip=1010)), dtype='f8',
count=1010)
#print "c ->", repr(c)
assert_array_equal(a[1010:2020], c, "iterator fails on zeros")
def test01(self):
"""Testing trim() with NumPy scalar values"""
N = 10000
ra = np.fromiter(((i, i*2.) for i in xrange(N-200)), dtype='i4,f8')
t = blz.fromiter(((i, i*2.) for i in xrange(N)), 'i4,f8', N,
rootdir=self.rootdir)
t.trim(np.int(200))
assert_array_equal(t[:], ra, "btable values are not correct")
def test02(self):
"""Testing trim() with a complete trim"""
N = 100
ra = np.fromiter(((i, i*2.) for i in xrange(0)), dtype='i4,f8')
t = blz.fromiter(((i, i*2.) for i in xrange(N)), 'i4,f8', N,
rootdir=self.rootdir)
t.trim(N)
self.assert_(len(ra) == len(t), "Lengths are not equal")
def test00(self):
"""Testing resize() (decreasing)"""
N = 100
ra = np.fromiter(((i, i*2.) for i in xrange(N-2)), dtype='i4,f8')
t = blz.fromiter(((i, i*2.) for i in xrange(N)), 'i4,f8', N,
rootdir=self.rootdir)
t.resize(N-2)
assert_array_equal(t[:], ra, "btable values are not correct")
def getobject(self):
if self.flavor == 'barray':
obj = blz.zeros(10, dtype="i1", rootdir=self.rootdir)
self.assertEqual(type(obj), blz.barray)
elif self.flavor == 'btable':
obj = blz.fromiter(((i,i*2) for i in range(10)), dtype='i2,f4',
count=10, rootdir=self.rootdir)
self.assertEqual(type(obj), blz.btable)
return obj
def test03a(self):
"""Testing btable creation from large iterator"""
N = 10*1000
ra = np.fromiter(((i, i*2.) for i in xrange(N)), dtype='i4,f8')
t = blz.fromiter(((i, i*2.) for i in xrange(N)), dtype='i4,f8',
count=N, rootdir=self.rootdir)
#print "t->", `t`
#print "ra[:]", ra[:]
assert_array_equal(t[:], ra, "btable values are not correct")
def test01(self):
"""Testing resize() (increasing)"""
N = 100
ra = np.fromiter(((i, i*2.) for i in xrange(N+4)), dtype='i4,f8')
t = blz.fromiter(((i, i*2.) for i in xrange(N)), 'i4,f8', N,
rootdir=self.rootdir)
t.resize(N+4)
ra['f0'][N:] = np.zeros(4)
ra['f1'][N:] = np.zeros(4)
assert_array_equal(t[:], ra, "btable values are not correct")
def test00(self):
"""Testing `iterchunks` method with no blen, no start, no stop"""
N = int(1e4)
a = blz.fromiter(xrange(N), dtype=np.float64, count=N)
l, s = 0, 0
for block in blz.iterblocks(a):
l += len(block)
s += block.sum()
self.assert_(l == N)
self.assert_(s == (N - 1) * (N / 2)) # as per Gauss summation formula
def test01(self):
"""Testing `iterchunks` method with no start, no stop"""
N, blen = int(1e4), 100
a = blz.fromiter(xrange(N), dtype=np.float64, count=N)
l, s = 0, 0
for block in blz.iterblocks(a, blen):
self.assert_(len(block) == blen)
l += len(block)
s += block.sum()
self.assert_(l == N)
def test02(self):
"""Testing `iterchunks` method with no stop"""
N, blen = int(1e4), 100
a = blz.fromiter(xrange(N), dtype=np.float64, count=N)
l, s = 0, 0
for block in blz.iterblocks(a, blen, blen-1):
l += len(block)
s += block.sum()
self.assert_(l == (N - (blen - 1)))
self.assert_(s == np.arange(blen-1, N).sum())
def test03(self):
"""Testing `iterchunks` method with all parameters set"""
N, blen = int(1e4), 100
a = blz.fromiter(xrange(N), dtype=np.float64, count=N)
l, s = 0, 0
for block in blz.iterblocks(a, blen, blen-1, 3*blen+2):
l += len(block)
s += block.sum()
self.assert_(l == 2*blen + 3)
self.assert_(s == np.arange(blen-1, 3*blen+2).sum())
def test02(self):
"""Testing fromiter (empty iter)"""
a = np.array([], dtype="f8")
b = blz.fromiter(iter(a), dtype='f8', count=-1)
assert_array_equal(b[:], a, "fromiter does not work correctly")
def test04b(self):
"""Testing fromiter method with large iterator with a hint"""
N = 10*1000
a = np.fromiter((i*2 for i in xrange(N)), dtype='f8', count=N)
b = blz.fromiter((i*2 for i in xrange(N)), dtype='f8', count=N)
assert_array_equal(b[:], a, "iterator with a hint fails")
def test00(self):
"""Testing fromiter (short iter)"""
a = np.arange(1,111)
b = blz.fromiter(iter(a), dtype='i4', count=len(a))
assert_array_equal(b[:], a, "fromiter does not work correctly")
def test03(self):
"""Testing fromiter (dtype conversion)"""
a = np.arange(101, dtype="f8")
b = blz.fromiter(iter(a), dtype='f4', count=len(a))
assert_array_equal(b[:], a, "fromiter does not work correctly")