/usr/lib/python2.7/dist-packages/numpy/ma/tests/test_mrecords.py is in python-numpy 1:1.12.1-3.
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"""Tests suite for mrecords.
:author: Pierre Gerard-Marchant
:contact: pierregm_at_uga_dot_edu
"""
from __future__ import division, absolute_import, print_function
import warnings
import pickle
import numpy as np
import numpy.ma as ma
from numpy import recarray
from numpy.compat import asbytes, asbytes_nested
from numpy.ma import masked, nomask
from numpy.testing import TestCase, run_module_suite, temppath
from numpy.core.records import (
fromrecords as recfromrecords, fromarrays as recfromarrays
)
from numpy.ma.mrecords import (
MaskedRecords, mrecarray, fromarrays, fromtextfile, fromrecords,
addfield
)
from numpy.ma.testutils import (
assert_, assert_equal,
assert_equal_records,
)
class TestMRecords(TestCase):
# Base test class for MaskedArrays.
def __init__(self, *args, **kwds):
TestCase.__init__(self, *args, **kwds)
self.setup()
def setup(self):
# Generic setup
ilist = [1, 2, 3, 4, 5]
flist = [1.1, 2.2, 3.3, 4.4, 5.5]
slist = asbytes_nested(['one', 'two', 'three', 'four', 'five'])
ddtype = [('a', int), ('b', float), ('c', '|S8')]
mask = [0, 1, 0, 0, 1]
self.base = ma.array(list(zip(ilist, flist, slist)),
mask=mask, dtype=ddtype)
def test_byview(self):
# Test creation by view
base = self.base
mbase = base.view(mrecarray)
assert_equal(mbase.recordmask, base.recordmask)
assert_equal_records(mbase._mask, base._mask)
assert_(isinstance(mbase._data, recarray))
assert_equal_records(mbase._data, base._data.view(recarray))
for field in ('a', 'b', 'c'):
assert_equal(base[field], mbase[field])
assert_equal_records(mbase.view(mrecarray), mbase)
def test_get(self):
# Tests fields retrieval
base = self.base.copy()
mbase = base.view(mrecarray)
# As fields..........
for field in ('a', 'b', 'c'):
assert_equal(getattr(mbase, field), mbase[field])
assert_equal(base[field], mbase[field])
# as elements .......
mbase_first = mbase[0]
assert_(isinstance(mbase_first, mrecarray))
assert_equal(mbase_first.dtype, mbase.dtype)
assert_equal(mbase_first.tolist(), (1, 1.1, asbytes('one')))
# Used to be mask, now it's recordmask
assert_equal(mbase_first.recordmask, nomask)
assert_equal(mbase_first._mask.item(), (False, False, False))
assert_equal(mbase_first['a'], mbase['a'][0])
mbase_last = mbase[-1]
assert_(isinstance(mbase_last, mrecarray))
assert_equal(mbase_last.dtype, mbase.dtype)
assert_equal(mbase_last.tolist(), (None, None, None))
# Used to be mask, now it's recordmask
assert_equal(mbase_last.recordmask, True)
assert_equal(mbase_last._mask.item(), (True, True, True))
assert_equal(mbase_last['a'], mbase['a'][-1])
assert_((mbase_last['a'] is masked))
# as slice ..........
mbase_sl = mbase[:2]
assert_(isinstance(mbase_sl, mrecarray))
assert_equal(mbase_sl.dtype, mbase.dtype)
# Used to be mask, now it's recordmask
assert_equal(mbase_sl.recordmask, [0, 1])
assert_equal_records(mbase_sl.mask,
np.array([(False, False, False),
(True, True, True)],
dtype=mbase._mask.dtype))
assert_equal_records(mbase_sl, base[:2].view(mrecarray))
for field in ('a', 'b', 'c'):
assert_equal(getattr(mbase_sl, field), base[:2][field])
def test_set_fields(self):
# Tests setting fields.
base = self.base.copy()
mbase = base.view(mrecarray)
mbase = mbase.copy()
mbase.fill_value = (999999, 1e20, 'N/A')
# Change the data, the mask should be conserved
mbase.a._data[:] = 5
assert_equal(mbase['a']._data, [5, 5, 5, 5, 5])
assert_equal(mbase['a']._mask, [0, 1, 0, 0, 1])
# Change the elements, and the mask will follow
mbase.a = 1
assert_equal(mbase['a']._data, [1]*5)
assert_equal(ma.getmaskarray(mbase['a']), [0]*5)
# Use to be _mask, now it's recordmask
assert_equal(mbase.recordmask, [False]*5)
assert_equal(mbase._mask.tolist(),
np.array([(0, 0, 0),
(0, 1, 1),
(0, 0, 0),
(0, 0, 0),
(0, 1, 1)],
dtype=bool))
# Set a field to mask ........................
mbase.c = masked
# Use to be mask, and now it's still mask !
assert_equal(mbase.c.mask, [1]*5)
assert_equal(mbase.c.recordmask, [1]*5)
assert_equal(ma.getmaskarray(mbase['c']), [1]*5)
assert_equal(ma.getdata(mbase['c']), [asbytes('N/A')]*5)
assert_equal(mbase._mask.tolist(),
np.array([(0, 0, 1),
(0, 1, 1),
(0, 0, 1),
(0, 0, 1),
(0, 1, 1)],
dtype=bool))
# Set fields by slices .......................
mbase = base.view(mrecarray).copy()
mbase.a[3:] = 5
assert_equal(mbase.a, [1, 2, 3, 5, 5])
assert_equal(mbase.a._mask, [0, 1, 0, 0, 0])
mbase.b[3:] = masked
assert_equal(mbase.b, base['b'])
assert_equal(mbase.b._mask, [0, 1, 0, 1, 1])
# Set fields globally..........................
ndtype = [('alpha', '|S1'), ('num', int)]
data = ma.array([('a', 1), ('b', 2), ('c', 3)], dtype=ndtype)
rdata = data.view(MaskedRecords)
val = ma.array([10, 20, 30], mask=[1, 0, 0])
rdata['num'] = val
assert_equal(rdata.num, val)
assert_equal(rdata.num.mask, [1, 0, 0])
def test_set_fields_mask(self):
# Tests setting the mask of a field.
base = self.base.copy()
# This one has already a mask....
mbase = base.view(mrecarray)
mbase['a'][-2] = masked
assert_equal(mbase.a, [1, 2, 3, 4, 5])
assert_equal(mbase.a._mask, [0, 1, 0, 1, 1])
# This one has not yet
mbase = fromarrays([np.arange(5), np.random.rand(5)],
dtype=[('a', int), ('b', float)])
mbase['a'][-2] = masked
assert_equal(mbase.a, [0, 1, 2, 3, 4])
assert_equal(mbase.a._mask, [0, 0, 0, 1, 0])
def test_set_mask(self):
base = self.base.copy()
mbase = base.view(mrecarray)
# Set the mask to True .......................
mbase.mask = masked
assert_equal(ma.getmaskarray(mbase['b']), [1]*5)
assert_equal(mbase['a']._mask, mbase['b']._mask)
assert_equal(mbase['a']._mask, mbase['c']._mask)
assert_equal(mbase._mask.tolist(),
np.array([(1, 1, 1)]*5, dtype=bool))
# Delete the mask ............................
mbase.mask = nomask
assert_equal(ma.getmaskarray(mbase['c']), [0]*5)
assert_equal(mbase._mask.tolist(),
np.array([(0, 0, 0)]*5, dtype=bool))
def test_set_mask_fromarray(self):
base = self.base.copy()
mbase = base.view(mrecarray)
# Sets the mask w/ an array
mbase.mask = [1, 0, 0, 0, 1]
assert_equal(mbase.a.mask, [1, 0, 0, 0, 1])
assert_equal(mbase.b.mask, [1, 0, 0, 0, 1])
assert_equal(mbase.c.mask, [1, 0, 0, 0, 1])
# Yay, once more !
mbase.mask = [0, 0, 0, 0, 1]
assert_equal(mbase.a.mask, [0, 0, 0, 0, 1])
assert_equal(mbase.b.mask, [0, 0, 0, 0, 1])
assert_equal(mbase.c.mask, [0, 0, 0, 0, 1])
def test_set_mask_fromfields(self):
mbase = self.base.copy().view(mrecarray)
nmask = np.array(
[(0, 1, 0), (0, 1, 0), (1, 0, 1), (1, 0, 1), (0, 0, 0)],
dtype=[('a', bool), ('b', bool), ('c', bool)])
mbase.mask = nmask
assert_equal(mbase.a.mask, [0, 0, 1, 1, 0])
assert_equal(mbase.b.mask, [1, 1, 0, 0, 0])
assert_equal(mbase.c.mask, [0, 0, 1, 1, 0])
# Reinitialize and redo
mbase.mask = False
mbase.fieldmask = nmask
assert_equal(mbase.a.mask, [0, 0, 1, 1, 0])
assert_equal(mbase.b.mask, [1, 1, 0, 0, 0])
assert_equal(mbase.c.mask, [0, 0, 1, 1, 0])
def test_set_elements(self):
base = self.base.copy()
# Set an element to mask .....................
mbase = base.view(mrecarray).copy()
mbase[-2] = masked
assert_equal(
mbase._mask.tolist(),
np.array([(0, 0, 0), (1, 1, 1), (0, 0, 0), (1, 1, 1), (1, 1, 1)],
dtype=bool))
# Used to be mask, now it's recordmask!
assert_equal(mbase.recordmask, [0, 1, 0, 1, 1])
# Set slices .................................
mbase = base.view(mrecarray).copy()
mbase[:2] = (5, 5, 5)
assert_equal(mbase.a._data, [5, 5, 3, 4, 5])
assert_equal(mbase.a._mask, [0, 0, 0, 0, 1])
assert_equal(mbase.b._data, [5., 5., 3.3, 4.4, 5.5])
assert_equal(mbase.b._mask, [0, 0, 0, 0, 1])
assert_equal(mbase.c._data,
asbytes_nested(['5', '5', 'three', 'four', 'five']))
assert_equal(mbase.b._mask, [0, 0, 0, 0, 1])
mbase = base.view(mrecarray).copy()
mbase[:2] = masked
assert_equal(mbase.a._data, [1, 2, 3, 4, 5])
assert_equal(mbase.a._mask, [1, 1, 0, 0, 1])
assert_equal(mbase.b._data, [1.1, 2.2, 3.3, 4.4, 5.5])
assert_equal(mbase.b._mask, [1, 1, 0, 0, 1])
assert_equal(mbase.c._data,
asbytes_nested(['one', 'two', 'three', 'four', 'five']))
assert_equal(mbase.b._mask, [1, 1, 0, 0, 1])
def test_setslices_hardmask(self):
# Tests setting slices w/ hardmask.
base = self.base.copy()
mbase = base.view(mrecarray)
mbase.harden_mask()
try:
mbase[-2:] = (5, 5, 5)
assert_equal(mbase.a._data, [1, 2, 3, 5, 5])
assert_equal(mbase.b._data, [1.1, 2.2, 3.3, 5, 5.5])
assert_equal(mbase.c._data,
asbytes_nested(['one', 'two', 'three', '5', 'five']))
assert_equal(mbase.a._mask, [0, 1, 0, 0, 1])
assert_equal(mbase.b._mask, mbase.a._mask)
assert_equal(mbase.b._mask, mbase.c._mask)
except NotImplementedError:
# OK, not implemented yet...
pass
except AssertionError:
raise
else:
raise Exception("Flexible hard masks should be supported !")
# Not using a tuple should crash
try:
mbase[-2:] = 3
except (NotImplementedError, TypeError):
pass
else:
raise TypeError("Should have expected a readable buffer object!")
def test_hardmask(self):
# Test hardmask
base = self.base.copy()
mbase = base.view(mrecarray)
mbase.harden_mask()
self.assertTrue(mbase._hardmask)
mbase.mask = nomask
assert_equal_records(mbase._mask, base._mask)
mbase.soften_mask()
self.assertTrue(not mbase._hardmask)
mbase.mask = nomask
# So, the mask of a field is no longer set to nomask...
assert_equal_records(mbase._mask,
ma.make_mask_none(base.shape, base.dtype))
self.assertTrue(ma.make_mask(mbase['b']._mask) is nomask)
assert_equal(mbase['a']._mask, mbase['b']._mask)
def test_pickling(self):
# Test pickling
base = self.base.copy()
mrec = base.view(mrecarray)
_ = pickle.dumps(mrec)
mrec_ = pickle.loads(_)
assert_equal(mrec_.dtype, mrec.dtype)
assert_equal_records(mrec_._data, mrec._data)
assert_equal(mrec_._mask, mrec._mask)
assert_equal_records(mrec_._mask, mrec._mask)
def test_filled(self):
# Test filling the array
_a = ma.array([1, 2, 3], mask=[0, 0, 1], dtype=int)
_b = ma.array([1.1, 2.2, 3.3], mask=[0, 0, 1], dtype=float)
_c = ma.array(['one', 'two', 'three'], mask=[0, 0, 1], dtype='|S8')
ddtype = [('a', int), ('b', float), ('c', '|S8')]
mrec = fromarrays([_a, _b, _c], dtype=ddtype,
fill_value=(99999, 99999., 'N/A'))
mrecfilled = mrec.filled()
assert_equal(mrecfilled['a'], np.array((1, 2, 99999), dtype=int))
assert_equal(mrecfilled['b'], np.array((1.1, 2.2, 99999.),
dtype=float))
assert_equal(mrecfilled['c'], np.array(('one', 'two', 'N/A'),
dtype='|S8'))
def test_tolist(self):
# Test tolist.
_a = ma.array([1, 2, 3], mask=[0, 0, 1], dtype=int)
_b = ma.array([1.1, 2.2, 3.3], mask=[0, 0, 1], dtype=float)
_c = ma.array(['one', 'two', 'three'], mask=[1, 0, 0], dtype='|S8')
ddtype = [('a', int), ('b', float), ('c', '|S8')]
mrec = fromarrays([_a, _b, _c], dtype=ddtype,
fill_value=(99999, 99999., 'N/A'))
assert_equal(mrec.tolist(),
[(1, 1.1, None), (2, 2.2, asbytes('two')),
(None, None, asbytes('three'))])
def test_withnames(self):
# Test the creation w/ format and names
x = mrecarray(1, formats=float, names='base')
x[0]['base'] = 10
assert_equal(x['base'][0], 10)
def test_exotic_formats(self):
# Test that 'exotic' formats are processed properly
easy = mrecarray(1, dtype=[('i', int), ('s', '|S8'), ('f', float)])
easy[0] = masked
assert_equal(easy.filled(1).item(), (1, asbytes('1'), 1.))
solo = mrecarray(1, dtype=[('f0', '<f8', (2, 2))])
solo[0] = masked
assert_equal(solo.filled(1).item(),
np.array((1,), dtype=solo.dtype).item())
mult = mrecarray(2, dtype="i4, (2,3)float, float")
mult[0] = masked
mult[1] = (1, 1, 1)
mult.filled(0)
assert_equal_records(mult.filled(0),
np.array([(0, 0, 0), (1, 1, 1)],
dtype=mult.dtype))
class TestView(TestCase):
def setUp(self):
(a, b) = (np.arange(10), np.random.rand(10))
ndtype = [('a', np.float), ('b', np.float)]
arr = np.array(list(zip(a, b)), dtype=ndtype)
mrec = fromarrays([a, b], dtype=ndtype, fill_value=(-9., -99.))
mrec.mask[3] = (False, True)
self.data = (mrec, a, b, arr)
def test_view_by_itself(self):
(mrec, a, b, arr) = self.data
test = mrec.view()
self.assertTrue(isinstance(test, MaskedRecords))
assert_equal_records(test, mrec)
assert_equal_records(test._mask, mrec._mask)
def test_view_simple_dtype(self):
(mrec, a, b, arr) = self.data
ntype = (np.float, 2)
test = mrec.view(ntype)
self.assertTrue(isinstance(test, ma.MaskedArray))
assert_equal(test, np.array(list(zip(a, b)), dtype=np.float))
self.assertTrue(test[3, 1] is ma.masked)
def test_view_flexible_type(self):
(mrec, a, b, arr) = self.data
alttype = [('A', np.float), ('B', np.float)]
test = mrec.view(alttype)
self.assertTrue(isinstance(test, MaskedRecords))
assert_equal_records(test, arr.view(alttype))
self.assertTrue(test['B'][3] is masked)
assert_equal(test.dtype, np.dtype(alttype))
self.assertTrue(test._fill_value is None)
##############################################################################
class TestMRecordsImport(TestCase):
# Base test class for MaskedArrays.
def __init__(self, *args, **kwds):
TestCase.__init__(self, *args, **kwds)
self.setup()
def setup(self):
# Generic setup
_a = ma.array([1, 2, 3], mask=[0, 0, 1], dtype=int)
_b = ma.array([1.1, 2.2, 3.3], mask=[0, 0, 1], dtype=float)
_c = ma.array(list(map(asbytes, ['one', 'two', 'three'])),
mask=[0, 0, 1], dtype='|S8')
ddtype = [('a', int), ('b', float), ('c', '|S8')]
mrec = fromarrays([_a, _b, _c], dtype=ddtype,
fill_value=(asbytes('99999'), asbytes('99999.'),
asbytes('N/A')))
nrec = recfromarrays((_a._data, _b._data, _c._data), dtype=ddtype)
self.data = (mrec, nrec, ddtype)
def test_fromarrays(self):
_a = ma.array([1, 2, 3], mask=[0, 0, 1], dtype=int)
_b = ma.array([1.1, 2.2, 3.3], mask=[0, 0, 1], dtype=float)
_c = ma.array(['one', 'two', 'three'], mask=[0, 0, 1], dtype='|S8')
(mrec, nrec, _) = self.data
for (f, l) in zip(('a', 'b', 'c'), (_a, _b, _c)):
assert_equal(getattr(mrec, f)._mask, l._mask)
# One record only
_x = ma.array([1, 1.1, 'one'], mask=[1, 0, 0],)
assert_equal_records(fromarrays(_x, dtype=mrec.dtype), mrec[0])
def test_fromrecords(self):
# Test construction from records.
(mrec, nrec, ddtype) = self.data
#......
palist = [(1, 'abc', 3.7000002861022949, 0),
(2, 'xy', 6.6999998092651367, 1),
(0, ' ', 0.40000000596046448, 0)]
pa = recfromrecords(palist, names='c1, c2, c3, c4')
mpa = fromrecords(palist, names='c1, c2, c3, c4')
assert_equal_records(pa, mpa)
#.....
_mrec = fromrecords(nrec)
assert_equal(_mrec.dtype, mrec.dtype)
for field in _mrec.dtype.names:
assert_equal(getattr(_mrec, field), getattr(mrec._data, field))
_mrec = fromrecords(nrec.tolist(), names='c1,c2,c3')
assert_equal(_mrec.dtype, [('c1', int), ('c2', float), ('c3', '|S5')])
for (f, n) in zip(('c1', 'c2', 'c3'), ('a', 'b', 'c')):
assert_equal(getattr(_mrec, f), getattr(mrec._data, n))
_mrec = fromrecords(mrec)
assert_equal(_mrec.dtype, mrec.dtype)
assert_equal_records(_mrec._data, mrec.filled())
assert_equal_records(_mrec._mask, mrec._mask)
def test_fromrecords_wmask(self):
# Tests construction from records w/ mask.
(mrec, nrec, ddtype) = self.data
_mrec = fromrecords(nrec.tolist(), dtype=ddtype, mask=[0, 1, 0,])
assert_equal_records(_mrec._data, mrec._data)
assert_equal(_mrec._mask.tolist(), [(0, 0, 0), (1, 1, 1), (0, 0, 0)])
_mrec = fromrecords(nrec.tolist(), dtype=ddtype, mask=True)
assert_equal_records(_mrec._data, mrec._data)
assert_equal(_mrec._mask.tolist(), [(1, 1, 1), (1, 1, 1), (1, 1, 1)])
_mrec = fromrecords(nrec.tolist(), dtype=ddtype, mask=mrec._mask)
assert_equal_records(_mrec._data, mrec._data)
assert_equal(_mrec._mask.tolist(), mrec._mask.tolist())
_mrec = fromrecords(nrec.tolist(), dtype=ddtype,
mask=mrec._mask.tolist())
assert_equal_records(_mrec._data, mrec._data)
assert_equal(_mrec._mask.tolist(), mrec._mask.tolist())
def test_fromtextfile(self):
# Tests reading from a text file.
fcontent = (
"""#
'One (S)','Two (I)','Three (F)','Four (M)','Five (-)','Six (C)'
'strings',1,1.0,'mixed column',,1
'with embedded "double quotes"',2,2.0,1.0,,1
'strings',3,3.0E5,3,,1
'strings',4,-1e-10,,,1
""")
with temppath() as path:
with open(path, 'w') as f:
f.write(fcontent)
mrectxt = fromtextfile(path, delimitor=',', varnames='ABCDEFG')
self.assertTrue(isinstance(mrectxt, MaskedRecords))
assert_equal(mrectxt.F, [1, 1, 1, 1])
assert_equal(mrectxt.E._mask, [1, 1, 1, 1])
assert_equal(mrectxt.C, [1, 2, 3.e+5, -1e-10])
def test_addfield(self):
# Tests addfield
(mrec, nrec, ddtype) = self.data
(d, m) = ([100, 200, 300], [1, 0, 0])
mrec = addfield(mrec, ma.array(d, mask=m))
assert_equal(mrec.f3, d)
assert_equal(mrec.f3._mask, m)
def test_record_array_with_object_field():
# Trac #1839
y = ma.masked_array(
[(1, '2'), (3, '4')],
mask=[(0, 0), (0, 1)],
dtype=[('a', int), ('b', np.object)])
# getting an item used to fail
y[1]
if __name__ == "__main__":
run_module_suite()
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