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Edit File: test_mrecords.py
# pylint: disable-msg=W0611, W0612, W0511,R0201 """Tests suite for mrecords. :author: Pierre Gerard-Marchant :contact: pierregm_at_uga_dot_edu """ import numpy as np import numpy.ma as ma from numpy import recarray from numpy.ma import masked, nomask from numpy.testing import 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, ) from numpy.compat import pickle class TestMRecords: ilist = [1, 2, 3, 4, 5] flist = [1.1, 2.2, 3.3, 4.4, 5.5] slist = [b'one', b'two', b'three', b'four', b'five'] ddtype = [('a', int), ('b', float), ('c', '|S8')] mask = [0, 1, 0, 0, 1] 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, b'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']), [b'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, [b'5', b'5', b'three', b'four', b'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, [b'one', b'two', b'three', b'four', b'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, [b'one', b'two', b'three', b'5', b'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() assert_(mbase._hardmask) mbase.mask = nomask assert_equal_records(mbase._mask, base._mask) mbase.soften_mask() assert_(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)) assert_(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) for proto in range(2, pickle.HIGHEST_PROTOCOL + 1): _ = pickle.dumps(mrec, protocol=proto) 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, b'two'), (None, None, b'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, b'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: def setup_method(self): (a, b) = (np.arange(10), np.random.rand(10)) ndtype = [('a', float), ('b', 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() assert_(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 = (float, 2) test = mrec.view(ntype) assert_(isinstance(test, ma.MaskedArray)) assert_equal(test, np.array(list(zip(a, b)), dtype=float)) assert_(test[3, 1] is ma.masked) def test_view_flexible_type(self): (mrec, a, b, arr) = self.data alttype = [('A', float), ('B', float)] test = mrec.view(alttype) assert_(isinstance(test, MaskedRecords)) assert_equal_records(test, arr.view(alttype)) assert_(test['B'][3] is masked) assert_equal(test.dtype, np.dtype(alttype)) assert_(test._fill_value is None) ############################################################################## class TestMRecordsImport: _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([b'one', b'two', b'three'], mask=[0, 0, 1], dtype='|S8') ddtype = [('a', int), ('b', float), ('c', '|S8')] mrec = fromarrays([_a, _b, _c], dtype=ddtype, fill_value=(b'99999', b'99999.', b'N/A')) nrec = recfromarrays((_a._data, _b._data, _c._data), dtype=ddtype) 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], dtype=object) 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, delimiter=',', varnames='ABCDEFG') assert_(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', object)]) # getting an item used to fail y[1]