def test04(self):
"""Testing append() with another ctable"""
N = 10
ra = np.fromiter(((i, i*2.) for i in xrange(N)), dtype='i4,f8')
t = ca.ctable(ra)
ra2 = np.fromiter(((i, i*2.) for i in xrange(N, N+10)), dtype='i4,f8')
t2 = ca.ctable(ra2)
t.append(t2)
ra = np.fromiter(((i, i*2.) for i in xrange(N+10)), dtype='i4,f8')
assert_array_equal(t[:], ra, "ctable values are not correct")
def test04(self):
"""Testing append() with another ctable"""
N = 10
ra = np.fromiter(((i, i * 2.) for i in xrange(N)), dtype='i4,f8')
t = ca.ctable(ra)
ra2 = np.fromiter(((i, i * 2.) for i in xrange(N, N + 10)),
dtype='i4,f8')
t2 = ca.ctable(ra2)
t.append(t2)
ra = np.fromiter(((i, i * 2.) for i in xrange(N + 10)), dtype='i4,f8')
assert_array_equal(t[:], ra, "ctable values are not correct")
def test02(self):
"""Testing __getitem__ with a short boolean array"""
N = 10
ra = np.fromiter(((i, i*2., i*3) for i in xrange(N)), dtype='i4,f8,i8')
t = ca.ctable(ra)
barr = np.zeros(len(t)-1, dtype=np.bool_)
self.assertRaises(IndexError, t.__getitem__, barr)
def open(rootdir, mode='a'):
"""
open(rootdir, mode='a')
Open a disk-based carray/ctable.
Parameters
----------
rootdir : pathname (string)
The directory hosting the carray/ctable object.
mode : the open mode (string)
Specifies the mode in which the object is opened. The supported
values are:
* 'r' for read-only
* 'w' for emptying the previous underlying data
* 'a' for allowing read/write on top of existing data
Returns
-------
out : a carray/ctable object or None (if not objects are found)
"""
# First try with a carray
obj = None
try:
obj = ca.carray(rootdir=rootdir, mode=mode)
except IOError:
# Not a carray. Now with a ctable
try:
obj = ca.ctable(rootdir=rootdir, mode=mode)
except IOError:
# Not a ctable
pass
return obj
def _test02d(self):
"""Testing where() with an expression (with outcols IV)"""
N = self.N
ra = np.fromiter(((i, i*2., i*3) for i in xrange(N)), dtype='i4,f8,i8')
t = ca.ctable(ra)
where = t.where('f1 > f2', outcols='f3, f0')
self.assertRaises(ValueError, where.next)
def test00(self):
"""Testing __len__()"""
N = 10
ra = np.fromiter(((i, i * 2., i * 3) for i in xrange(N)),
dtype='i4,f8,i8')
t = ca.ctable(ra)
self.assert_(len(t) == len(ra), "Objects do not have the same length")
def test03(self):
"""Testing __getitem__ with an invalid expression"""
N = 10
ra = np.fromiter(((i, i*2., i*3) for i in xrange(N)), dtype='i4,f8,i8')
t = ca.ctable(ra)
# In t['f1*4 >= ppp'], 'ppp' variable name should be found
self.assertRaises(NameError, t.__getitem__, 'f1*4 >= ppp')
def test01b(self):
"""Testing cparams when adding a new column (numpy flavor)"""
N = 10
ra = np.fromiter(((i, i * 2.) for i in xrange(N)), dtype='i4,f8')
t = ca.ctable(ra, cparams=ca.cparams(1))
c = np.arange(N, dtype='i8') * 3
t.addcol(c, 'f2')
self.assert_(t['f2'].cparams.clevel == 1, "Incorrect clevel")
def _test02d(self):
"""Testing where() with an expression (with outcols IV)"""
N = self.N
ra = np.fromiter(((i, i * 2., i * 3) for i in xrange(N)),
dtype='i4,f8,i8')
t = ca.ctable(ra)
where = t.where('f1 > f2', outcols='f3, f0')
self.assertRaises(ValueError, where.next)
def test00(self):
"""Testing append() with scalar values"""
N = 10
ra = np.fromiter(((i, i * 2.) for i in xrange(N)), dtype='i4,f8')
t = ca.ctable(ra)
t.append((N, N * 2))
ra = np.fromiter(((i, i * 2.) for i in xrange(N + 1)), dtype='i4,f8')
assert_array_equal(t[:], ra, "ctable values are not correct")
def test01b(self):
"""Testing cparams when adding a new column (numpy flavor)"""
N = 10
ra = np.fromiter(((i, i*2.) for i in xrange(N)), dtype='i4,f8')
t = ca.ctable(ra, cparams=ca.cparams(1))
c = np.arange(N, dtype='i8')*3
t.addcol(c, 'f2')
self.assert_(t['f2'].cparams.clevel == 1, "Incorrect clevel")
def test03(self):
"""Testing copy() with no shuffle"""
N = 10 * 1000
ra = np.fromiter(((i, i**2.2) for i in xrange(N)), dtype='i4,f8')
t = ca.ctable(ra)
t2 = t.copy(cparams=ca.cparams(shuffle=False))
#print "cbytes in f1, f2:", t['f1'].cbytes, t2['f1'].cbytes
self.assert_(t['f1'].cbytes < t2['f1'].cbytes, "clevel not changed")
def test02(self):
"""Testing __getitem__ with a short boolean array"""
N = 10
ra = np.fromiter(((i, i * 2., i * 3) for i in xrange(N)),
dtype='i4,f8,i8')
t = ca.ctable(ra)
barr = np.zeros(len(t) - 1, dtype=np.bool_)
self.assertRaises(IndexError, t.__getitem__, barr)
def test02(self):
"""Testing ctable creation from an structured array"""
N = 10
ra = np.fromiter(((i, i*2.) for i in xrange(N)), dtype='i4,f8')
t = ca.ctable(ra)
#print "t->", `t`
#print "ra[:]", ra[:]
assert_array_equal(t[:], ra, "ctable values are not correct")
def test00(self):
"""Testing append() with scalar values"""
N = 10
ra = np.fromiter(((i, i*2.) for i in xrange(N)), dtype='i4,f8')
t = ca.ctable(ra)
t.append((N, N*2))
ra = np.fromiter(((i, i*2.) for i in xrange(N+1)), dtype='i4,f8')
assert_array_equal(t[:], ra, "ctable values are not correct")
def test03(self):
"""Testing __getitem__ with an invalid expression"""
N = 10
ra = np.fromiter(((i, i * 2., i * 3) for i in xrange(N)),
dtype='i4,f8,i8')
t = ca.ctable(ra)
# In t['f1*4 >= ppp'], 'ppp' variable name should be found
self.assertRaises(NameError, t.__getitem__, 'f1*4 >= ppp')
def test03(self):
"""Testing copy() with no shuffle"""
N = 10*1000
ra = np.fromiter(((i, i**2.2) for i in xrange(N)), dtype='i4,f8')
t = ca.ctable(ra)
t2 = t.copy(cparams=ca.cparams(shuffle=False))
#print "cbytes in f1, f2:", t['f1'].cbytes, t2['f1'].cbytes
self.assert_(t['f1'].cbytes < t2['f1'].cbytes, "clevel not changed")
def test02(self):
"""Testing ctable creation from an structured array"""
N = 10
ra = np.fromiter(((i, i * 2.) for i in xrange(N)), dtype='i4,f8')
t = ca.ctable(ra)
#print "t->", `t`
#print "ra[:]", ra[:]
assert_array_equal(t[:], ra, "ctable values are not correct")
def test00(self):
"""Testing __getitem__ with only a start"""
N = 10
ra = np.fromiter(((i, i*2.) for i in xrange(N)), dtype='i4,f8')
t = ca.ctable(ra)
start = 9
#print "t->", `t`
#print "ra[:]", ra[:]
assert_array_equal(t[start], ra[start], "ctable values are not correct")
def test02(self):
"""Testing __sizeof__() (small ctables)"""
N = int(111)
ra = np.fromiter(((i, i * 2., i * 3) for i in xrange(N)),
dtype='i4,f8,i8')
t = ca.ctable(ra)
#print "size t uncompressed ->", t.nbytes
#print "size t compressed ->", t.cbytes
self.assert_(sys.getsizeof(t) > t.nbytes, "ctable compress too much??")
def test01(self):
"""Testing __sizeof__() (big ctables)"""
N = int(1e4)
ra = np.fromiter(((i, i*2., i*3) for i in xrange(N)), dtype='i4,f8,i8')
t = ca.ctable(ra)
#print "size t uncompressed ->", t.nbytes
#print "size t compressed ->", t.cbytes
self.assert_(sys.getsizeof(t) < t.nbytes,
"ctable does not seem to compress at all")
def test02(self):
"""Testing __sizeof__() (small ctables)"""
N = int(111)
ra = np.fromiter(((i, i*2., i*3) for i in xrange(N)), dtype='i4,f8,i8')
t = ca.ctable(ra)
#print "size t uncompressed ->", t.nbytes
#print "size t compressed ->", t.cbytes
self.assert_(sys.getsizeof(t) > t.nbytes,
"ctable compress too much??")
def test03(self):
"""Testing where() with an expression (with nrow__ in outcols)"""
N = self.N
ra = np.fromiter(((i, i*2., i*3) for i in xrange(N)), dtype='i4,f8,i8')
t = ca.ctable(ra)
rt = [r for r in t.where('4+f1 > f2', outcols=['nrow__','f2','f0'])]
rl = [(i, i*3, i) for i in xrange(N) if 4+i > i*2]
#print "rt->", rt, type(rt[0][0])
#print "rl->", rl, type(rl[0][0])
self.assert_(rt == rl, "where not working correctly")
def test03(self):
"""Testing __getitem__ with a column name"""
N = 10
ra = np.fromiter(((i, i * 2.) for i in xrange(N)), dtype='i4,f8')
t = ca.ctable(ra)
colname = "f1"
#print "t->", `t[colname]`
#print "ra->", ra[colname]
assert_array_equal(t[colname][:], ra[colname],
"ctable values are not correct")
def test02(self):
"""Testing copy() with lower clevel"""
N = 10 * 1000
ra = np.fromiter(((i, i**2.2) for i in xrange(N)), dtype='i4,f8')
t = ca.ctable(ra)
t2 = t.copy(cparams=ca.cparams(clevel=1))
self.assert_(t.cparams.clevel == ca.cparams().clevel)
self.assert_(t2.cparams.clevel == 1)
#print "cbytes in f1, f2:", t['f1'].cbytes, t2['f1'].cbytes
self.assert_(t['f1'].cbytes < t2['f1'].cbytes, "clevel not changed")
def test02(self):
"""Testing append() with carrays"""
N = 10
ra = np.fromiter(((i, i * 2.) for i in xrange(N)), dtype='i4,f8')
t = ca.ctable(ra)
a = np.arange(N, N + 10, dtype='i4')
b = np.arange(N, N + 10, dtype='f8') * 2.
t.append((ca.carray(a), ca.carray(b)))
ra = np.fromiter(((i, i * 2.) for i in xrange(N + 10)), dtype='i4,f8')
assert_array_equal(t[:], ra, "ctable values are not correct")
def test02c(self):
"""Testing where() with an expression (with outcols III)"""
N = self.N
ra = np.fromiter(((i, i*2., i*3) for i in xrange(N)), dtype='i4,f8,i8')
t = ca.ctable(ra)
rt = [(f2, f0) for f0,f2 in t.where('4+f1 > f2', outcols='f0,f2')]
rl = [(i*3, i) for i in xrange(N) if 4+i > i*2]
#print "rt->", rt
#print "rl->", rl
self.assert_(rt == rl, "where not working correctly")
def test02(self):
"""Testing append() with carrays"""
N = 10
ra = np.fromiter(((i, i*2.) for i in xrange(N)), dtype='i4,f8')
t = ca.ctable(ra)
a = np.arange(N, N+10, dtype='i4')
b = np.arange(N, N+10, dtype='f8')*2.
t.append((ca.carray(a), ca.carray(b)))
ra = np.fromiter(((i, i*2.) for i in xrange(N+10)), dtype='i4,f8')
assert_array_equal(t[:], ra, "ctable values are not correct")
def test07(self):
"""Testing ctable.iter() with start, stop, step and limit, skip"""
N = 10
ra = np.fromiter(((i, i*2., i*3) for i in xrange(N)), dtype='i4,f8,i8')
t = ca.ctable(ra, chunklen=4)
cl = [r.f1 for r in t.iter(1,9,2, limit=2, skip=1)]
nl = [r['f1'] for r in ra[1:9:2][1:3]]
#print "cl ->", cl
#print "nl ->", nl
self.assert_(cl == nl, "iter not working correctily")
def test01c(self):
"""Testing where() with an expression (mix values)"""
N = self.N
ra = np.fromiter(((i, i*2., i*3) for i in xrange(N)), dtype='i4,f8,i8')
t = ca.ctable(ra)
rt = [r.f0 for r in t.where('4+f1 > f2')]
rl = [i for i in xrange(N) if 4+i > i*2]
#print "rt->", rt
#print "rl->", rl
self.assert_(rt == rl, "where not working correctly")
def test03(self):
"""Testing ctable.iter() with outcols"""
N = 10
ra = np.fromiter(((i, i*2., i*3) for i in xrange(N)), dtype='i4,f8,i8')
t = ca.ctable(ra, chunklen=4)
cl = [tuple(r) for r in t.iter(outcols='f2, nrow__, f0')]
nl = [(r['f2'], i, r['f0']) for i, r in enumerate(ra)]
#print "cl ->", cl
#print "nl ->", nl
self.assert_(cl == nl, "iter not working correctily")
def test00(self):
"""Testing __getitem__ with only a start"""
N = 10
ra = np.fromiter(((i, i * 2.) for i in xrange(N)), dtype='i4,f8')
t = ca.ctable(ra)
start = 9
#print "t->", `t`
#print "ra[:]", ra[:]
assert_array_equal(t[start], ra[start],
"ctable values are not correct")
def test01(self):
"""Testing ctable creation from a tuple of numpy arrays"""
N = 1e1
a = np.arange(N, dtype='i4')
b = np.arange(N, dtype='f8') + 1
t = ca.ctable((a, b), ('f0', 'f1'))
#print "t->", `t`
ra = np.rec.fromarrays([a, b]).view(np.ndarray)
#print "ra[:]", ra[:]
assert_array_equal(t[:], ra, "ctable values are not correct")
def test04(self):
"""Testing ctable.iter() with start,stop,step and outcols"""
N = 10
ra = np.fromiter(((i, i*2., i*3) for i in xrange(N)), dtype='i4,f8,i8')
t = ca.ctable(ra, chunklen=4)
cl = [r for r in t.iter(1,9,3, 'f2, nrow__ f0')]
nl = [(r['f2'], r['f0'], r['f0']) for r in ra[1:9:3]]
#print "cl ->", cl
#print "nl ->", nl
self.assert_(cl == nl, "iter not working correctily")
def test04(self):
"""Testing eval() with a boolean as output"""
N = 10
ra = np.fromiter(((i, i*2., i*3) for i in xrange(N)), dtype='i4,f8,i8')
t = ca.ctable(ra)
ctr = t.eval("f0 >= f1")
rar = ra['f0'] >= ra['f1']
#print "ctable ->", ctr
#print "numpy ->", rar
assert_array_equal(ctr[:], rar, "ctable values are not correct")
def test01(self):
"""Testing eval() with columns and constants"""
N = 10
ra = np.fromiter(((i, i*2., i*3) for i in xrange(N)), dtype='i4,f8,i8')
t = ca.ctable(ra)
ctr = t.eval("f0 * f1 * 3")
rar = ra['f0'] * ra['f1'] * 3
#print "ctable ->", ctr
#print "numpy ->", rar
assert_array_equal(ctr[:], rar, "ctable values are not correct")
def test03(self):
"""Testing fancy indexing (list of floats)"""
N = 101
ra = np.fromiter(((i, i*2., i*3) for i in xrange(N)), dtype='i4,f8,i8')
t = ca.ctable(ra)
rt = t[[2.3, 5.6]]
rar = ra[[2.3, 5.6]]
#print "rt->", rt
#print "rar->", rar
assert_array_equal(rt, rar, "ctable values are not correct")
def test02(self):
"""Testing copy() with lower clevel"""
N = 10*1000
ra = np.fromiter(((i, i**2.2) for i in xrange(N)), dtype='i4,f8')
t = ca.ctable(ra)
t2 = t.copy(cparams=ca.cparams(clevel=1))
self.assert_(t.cparams.clevel == ca.cparams().clevel)
self.assert_(t2.cparams.clevel == 1)
#print "cbytes in f1, f2:", t['f1'].cbytes, t2['f1'].cbytes
self.assert_(t['f1'].cbytes < t2['f1'].cbytes, "clevel not changed")
def test01(self):
"""Testing ctable.iter() without params"""
N = 10
ra = np.fromiter(((i, i*2., i*3) for i in xrange(N)), dtype='i4,f8,i8')
t = ca.ctable(ra, chunklen=4)
cl = [r.f1 for r in t.iter()]
nl = [r['f1'] for r in ra]
#print "cl ->", cl
#print "nl ->", nl
self.assert_(cl == nl, "iter not working correctily")
def test02(self):
"""Testing __getitem__ with start, stop, step"""
N = 10
ra = np.fromiter(((i, i * 2.) for i in xrange(N)), dtype='i4,f8')
t = ca.ctable(ra)
start, stop, step = 3, 9, 2
#print "t->", `t[start:stop:step]`
#print "ra->", ra[start:stop:step]
assert_array_equal(t[start:stop:step], ra[start:stop:step],
"ctable values are not correct")
def test01(self):
"""Testing ctable creation from a tuple of numpy arrays"""
N = 1e1
a = np.arange(N, dtype='i4')
b = np.arange(N, dtype='f8')+1
t = ca.ctable((a, b), ('f0', 'f1'))
#print "t->", `t`
ra = np.rec.fromarrays([a,b]).view(np.ndarray)
#print "ra[:]", ra[:]
assert_array_equal(t[:], ra, "ctable values are not correct")
def test02(self):
"""Testing fancy indexing with an empty list"""
N = 10*1000
ra = np.fromiter(((i, i*2., i*3) for i in xrange(N)), dtype='i4,f8,i8')
t = ca.ctable(ra)
rt = t[[]]
rar = ra[[]]
#print "rt->", rt
#print "rar->", rar
assert_array_equal(rt, rar, "ctable values are not correct")
def test04(self):
"""Testing __getitem__ with a list of column names"""
N = 10
ra = np.fromiter(((i, i*2., i*3) for i in xrange(N)), dtype='i4,f8,i8')
t = ca.ctable(ra)
colnames = ["f0", "f2"]
#print "t->", `t[colnames]`
#print "ra->", ra[colnames]
assert_array_equal(t[colnames][:], ra[colnames],
"ctable values are not correct")
def test03(self):
"""Testing __getitem__ with a column name"""
N = 10
ra = np.fromiter(((i, i*2.) for i in xrange(N)), dtype='i4,f8')
t = ca.ctable(ra)
colname = "f1"
#print "t->", `t[colname]`
#print "ra->", ra[colname]
assert_array_equal(t[colname][:], ra[colname],
"ctable values are not correct")
def test02(self):
"""Testing __getitem__ with start, stop, step"""
N = 10
ra = np.fromiter(((i, i*2.) for i in xrange(N)), dtype='i4,f8')
t = ca.ctable(ra)
start, stop, step = 3, 9, 2
#print "t->", `t[start:stop:step]`
#print "ra->", ra[start:stop:step]
assert_array_equal(t[start:stop:step], ra[start:stop:step],
"ctable values are not correct")
def test02c(self):
"""Testing where() with an expression (with outcols III)"""
N = self.N
ra = np.fromiter(((i, i * 2., i * 3) for i in xrange(N)),
dtype='i4,f8,i8')
t = ca.ctable(ra)
rt = [(f2, f0) for f0, f2 in t.where('4+f1 > f2', outcols='f0,f2')]
rl = [(i * 3, i) for i in xrange(N) if 4 + i > i * 2]
#print "rt->", rt
#print "rl->", rl
self.assert_(rt == rl, "where not working correctly")
def test01(self):
"""Testing __sizeof__() (big ctables)"""
N = int(1e4)
ra = np.fromiter(((i, i * 2., i * 3) for i in xrange(N)),
dtype='i4,f8,i8')
t = ca.ctable(ra)
#print "size t uncompressed ->", t.nbytes
#print "size t compressed ->", t.cbytes
self.assert_(
sys.getsizeof(t) < t.nbytes,
"ctable does not seem to compress at all")
def test01(self):
"""Testing eval() with columns and constants"""
N = 10
ra = np.fromiter(((i, i * 2., i * 3) for i in xrange(N)),
dtype='i4,f8,i8')
t = ca.ctable(ra)
ctr = t.eval("f0 * f1 * 3")
rar = ra['f0'] * ra['f1'] * 3
#print "ctable ->", ctr
#print "numpy ->", rar
assert_array_equal(ctr[:], rar, "ctable values are not correct")
def test02(self):
"""Testing fancy indexing with an empty list"""
N = 10 * 1000
ra = np.fromiter(((i, i * 2., i * 3) for i in xrange(N)),
dtype='i4,f8,i8')
t = ca.ctable(ra)
rt = t[[]]
rar = ra[[]]
#print "rt->", rt
#print "rar->", rar
assert_array_equal(rt, rar, "ctable values are not correct")
def test03(self):
"""Testing fancy indexing (list of floats)"""
N = 101
ra = np.fromiter(((i, i * 2., i * 3) for i in xrange(N)),
dtype='i4,f8,i8')
t = ca.ctable(ra)
rt = t[[2.3, 5.6]]
rar = ra[[2.3, 5.6]]
#print "rt->", rt
#print "rar->", rar
assert_array_equal(rt, rar, "ctable values are not correct")
def test01(self):
"""Testing ctable.iter() without params"""
N = 10
ra = np.fromiter(((i, i * 2., i * 3) for i in xrange(N)),
dtype='i4,f8,i8')
t = ca.ctable(ra, chunklen=4)
cl = [r.f1 for r in t.iter()]
nl = [r['f1'] for r in ra]
#print "cl ->", cl
#print "nl ->", nl
self.assert_(cl == nl, "iter not working correctily")
def test07(self):
"""Testing ctable.iter() with start, stop, step and limit, skip"""
N = 10
ra = np.fromiter(((i, i * 2., i * 3) for i in xrange(N)),
dtype='i4,f8,i8')
t = ca.ctable(ra, chunklen=4)
cl = [r.f1 for r in t.iter(1, 9, 2, limit=2, skip=1)]
nl = [r['f1'] for r in ra[1:9:2][1:3]]
#print "cl ->", cl
#print "nl ->", nl
self.assert_(cl == nl, "iter not working correctily")
def test02(self):
"""Testing __getitem__ with an expression (true/false values)"""
N = 10
ra = np.fromiter(((i, i*2., i*3) for i in xrange(N)), dtype='i4,f8,i8')
t = ca.ctable(ra)
rt = t['f1*4 >= f2*2']
rar = np.fromiter(((i, i*2., i*3) for i in xrange(N) if i*4 >= i*2.*2),
dtype='i4,f8,i8')
#print "rt->", rt
#print "rar->", rar
assert_array_equal(rt, rar, "ctable values are not correct")
def test03(self):
"""Testing where() with an expression (with nrow__ in outcols)"""
N = self.N
ra = np.fromiter(((i, i * 2., i * 3) for i in xrange(N)),
dtype='i4,f8,i8')
t = ca.ctable(ra)
rt = [r for r in t.where('4+f1 > f2', outcols=['nrow__', 'f2', 'f0'])]
rl = [(i, i * 3, i) for i in xrange(N) if 4 + i > i * 2]
#print "rt->", rt, type(rt[0][0])
#print "rl->", rl, type(rl[0][0])
self.assert_(rt == rl, "where not working correctly")
def test04(self):
"""Testing __setitem__ with a large step"""
N = 100
ra = np.fromiter(((i, i * 2.) for i in xrange(N)), dtype='i4,f8')
t = ca.ctable(ra, chunklen=10)
sl = slice(1, 43, 20)
t[sl] = (0, 1)
ra[sl] = (0, 1)
#print "t[%s] -> %r" % (sl, t)
#print "ra[%s] -> %r" % (sl, ra)
assert_array_equal(t[:], ra, "ctable values are not correct")
def test03(self):
"""Testing ctable.iter() with outcols"""
N = 10
ra = np.fromiter(((i, i * 2., i * 3) for i in xrange(N)),
dtype='i4,f8,i8')
t = ca.ctable(ra, chunklen=4)
cl = [tuple(r) for r in t.iter(outcols='f2, nrow__, f0')]
nl = [(r['f2'], i, r['f0']) for i, r in enumerate(ra)]
#print "cl ->", cl
#print "nl ->", nl
self.assert_(cl == nl, "iter not working correctily")
def test01c(self):
"""Testing where() with an expression (mix values)"""
N = self.N
ra = np.fromiter(((i, i * 2., i * 3) for i in xrange(N)),
dtype='i4,f8,i8')
t = ca.ctable(ra)
rt = [r.f0 for r in t.where('4+f1 > f2')]
rl = [i for i in xrange(N) if 4 + i > i * 2]
#print "rt->", rt
#print "rl->", rl
self.assert_(rt == rl, "where not working correctly")
def test04(self):
"""Testing eval() with a boolean as output"""
N = 10
ra = np.fromiter(((i, i * 2., i * 3) for i in xrange(N)),
dtype='i4,f8,i8')
t = ca.ctable(ra)
ctr = t.eval("f0 >= f1")
rar = ra['f0'] >= ra['f1']
#print "ctable ->", ctr
#print "numpy ->", rar
assert_array_equal(ctr[:], rar, "ctable values are not correct")
def test04(self):
"""Testing __getitem__ with a list of column names"""
N = 10
ra = np.fromiter(((i, i * 2., i * 3) for i in xrange(N)),
dtype='i4,f8,i8')
t = ca.ctable(ra)
colnames = ["f0", "f2"]
#print "t->", `t[colnames]`
#print "ra->", ra[colnames]
assert_array_equal(t[colnames][:], ra[colnames],
"ctable values are not correct")
def test04(self):
"""Testing ctable.iter() with start,stop,step and outcols"""
N = 10
ra = np.fromiter(((i, i * 2., i * 3) for i in xrange(N)),
dtype='i4,f8,i8')
t = ca.ctable(ra, chunklen=4)
cl = [r for r in t.iter(1, 9, 3, 'f2, nrow__ f0')]
nl = [(r['f2'], r['f0'], r['f0']) for r in ra[1:9:3]]
#print "cl ->", cl
#print "nl ->", nl
self.assert_(cl == nl, "iter not working correctily")