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494 lines
19 KiB
494 lines
19 KiB
# pylint: disable-msg=W0611, W0612, W0511,R0201
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"""Tests suite for mrecords.
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:author: Pierre Gerard-Marchant
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:contact: pierregm_at_uga_dot_edu
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"""
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import numpy as np
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import numpy.ma as ma
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from numpy import recarray
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from numpy.ma import masked, nomask
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from numpy.testing import temppath
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from numpy.core.records import (
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fromrecords as recfromrecords, fromarrays as recfromarrays
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)
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from numpy.ma.mrecords import (
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MaskedRecords, mrecarray, fromarrays, fromtextfile, fromrecords,
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addfield
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)
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from numpy.ma.testutils import (
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assert_, assert_equal,
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assert_equal_records,
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)
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from numpy.compat import pickle
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class TestMRecords:
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ilist = [1, 2, 3, 4, 5]
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flist = [1.1, 2.2, 3.3, 4.4, 5.5]
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slist = [b'one', b'two', b'three', b'four', b'five']
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ddtype = [('a', int), ('b', float), ('c', '|S8')]
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mask = [0, 1, 0, 0, 1]
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base = ma.array(list(zip(ilist, flist, slist)), mask=mask, dtype=ddtype)
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def test_byview(self):
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# Test creation by view
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base = self.base
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mbase = base.view(mrecarray)
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assert_equal(mbase.recordmask, base.recordmask)
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assert_equal_records(mbase._mask, base._mask)
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assert_(isinstance(mbase._data, recarray))
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assert_equal_records(mbase._data, base._data.view(recarray))
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for field in ('a', 'b', 'c'):
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assert_equal(base[field], mbase[field])
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assert_equal_records(mbase.view(mrecarray), mbase)
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def test_get(self):
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# Tests fields retrieval
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base = self.base.copy()
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mbase = base.view(mrecarray)
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# As fields..........
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for field in ('a', 'b', 'c'):
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assert_equal(getattr(mbase, field), mbase[field])
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assert_equal(base[field], mbase[field])
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# as elements .......
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mbase_first = mbase[0]
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assert_(isinstance(mbase_first, mrecarray))
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assert_equal(mbase_first.dtype, mbase.dtype)
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assert_equal(mbase_first.tolist(), (1, 1.1, b'one'))
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# Used to be mask, now it's recordmask
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assert_equal(mbase_first.recordmask, nomask)
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assert_equal(mbase_first._mask.item(), (False, False, False))
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assert_equal(mbase_first['a'], mbase['a'][0])
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mbase_last = mbase[-1]
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assert_(isinstance(mbase_last, mrecarray))
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assert_equal(mbase_last.dtype, mbase.dtype)
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assert_equal(mbase_last.tolist(), (None, None, None))
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# Used to be mask, now it's recordmask
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assert_equal(mbase_last.recordmask, True)
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assert_equal(mbase_last._mask.item(), (True, True, True))
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assert_equal(mbase_last['a'], mbase['a'][-1])
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assert_((mbase_last['a'] is masked))
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# as slice ..........
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mbase_sl = mbase[:2]
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assert_(isinstance(mbase_sl, mrecarray))
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assert_equal(mbase_sl.dtype, mbase.dtype)
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# Used to be mask, now it's recordmask
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assert_equal(mbase_sl.recordmask, [0, 1])
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assert_equal_records(mbase_sl.mask,
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np.array([(False, False, False),
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(True, True, True)],
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dtype=mbase._mask.dtype))
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assert_equal_records(mbase_sl, base[:2].view(mrecarray))
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for field in ('a', 'b', 'c'):
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assert_equal(getattr(mbase_sl, field), base[:2][field])
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def test_set_fields(self):
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# Tests setting fields.
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base = self.base.copy()
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mbase = base.view(mrecarray)
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mbase = mbase.copy()
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mbase.fill_value = (999999, 1e20, 'N/A')
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# Change the data, the mask should be conserved
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mbase.a._data[:] = 5
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assert_equal(mbase['a']._data, [5, 5, 5, 5, 5])
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assert_equal(mbase['a']._mask, [0, 1, 0, 0, 1])
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# Change the elements, and the mask will follow
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mbase.a = 1
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assert_equal(mbase['a']._data, [1]*5)
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assert_equal(ma.getmaskarray(mbase['a']), [0]*5)
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# Use to be _mask, now it's recordmask
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assert_equal(mbase.recordmask, [False]*5)
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assert_equal(mbase._mask.tolist(),
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np.array([(0, 0, 0),
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(0, 1, 1),
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(0, 0, 0),
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(0, 0, 0),
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(0, 1, 1)],
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dtype=bool))
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# Set a field to mask ........................
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mbase.c = masked
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# Use to be mask, and now it's still mask !
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assert_equal(mbase.c.mask, [1]*5)
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assert_equal(mbase.c.recordmask, [1]*5)
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assert_equal(ma.getmaskarray(mbase['c']), [1]*5)
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assert_equal(ma.getdata(mbase['c']), [b'N/A']*5)
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assert_equal(mbase._mask.tolist(),
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np.array([(0, 0, 1),
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(0, 1, 1),
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(0, 0, 1),
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(0, 0, 1),
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(0, 1, 1)],
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dtype=bool))
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# Set fields by slices .......................
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mbase = base.view(mrecarray).copy()
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mbase.a[3:] = 5
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assert_equal(mbase.a, [1, 2, 3, 5, 5])
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assert_equal(mbase.a._mask, [0, 1, 0, 0, 0])
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mbase.b[3:] = masked
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assert_equal(mbase.b, base['b'])
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assert_equal(mbase.b._mask, [0, 1, 0, 1, 1])
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# Set fields globally..........................
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ndtype = [('alpha', '|S1'), ('num', int)]
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data = ma.array([('a', 1), ('b', 2), ('c', 3)], dtype=ndtype)
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rdata = data.view(MaskedRecords)
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val = ma.array([10, 20, 30], mask=[1, 0, 0])
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rdata['num'] = val
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assert_equal(rdata.num, val)
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assert_equal(rdata.num.mask, [1, 0, 0])
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def test_set_fields_mask(self):
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# Tests setting the mask of a field.
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base = self.base.copy()
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# This one has already a mask....
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mbase = base.view(mrecarray)
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mbase['a'][-2] = masked
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assert_equal(mbase.a, [1, 2, 3, 4, 5])
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assert_equal(mbase.a._mask, [0, 1, 0, 1, 1])
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# This one has not yet
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mbase = fromarrays([np.arange(5), np.random.rand(5)],
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dtype=[('a', int), ('b', float)])
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mbase['a'][-2] = masked
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assert_equal(mbase.a, [0, 1, 2, 3, 4])
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assert_equal(mbase.a._mask, [0, 0, 0, 1, 0])
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def test_set_mask(self):
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base = self.base.copy()
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mbase = base.view(mrecarray)
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# Set the mask to True .......................
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mbase.mask = masked
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assert_equal(ma.getmaskarray(mbase['b']), [1]*5)
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assert_equal(mbase['a']._mask, mbase['b']._mask)
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assert_equal(mbase['a']._mask, mbase['c']._mask)
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assert_equal(mbase._mask.tolist(),
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np.array([(1, 1, 1)]*5, dtype=bool))
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# Delete the mask ............................
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mbase.mask = nomask
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assert_equal(ma.getmaskarray(mbase['c']), [0]*5)
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assert_equal(mbase._mask.tolist(),
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np.array([(0, 0, 0)]*5, dtype=bool))
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def test_set_mask_fromarray(self):
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base = self.base.copy()
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mbase = base.view(mrecarray)
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# Sets the mask w/ an array
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mbase.mask = [1, 0, 0, 0, 1]
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assert_equal(mbase.a.mask, [1, 0, 0, 0, 1])
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assert_equal(mbase.b.mask, [1, 0, 0, 0, 1])
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assert_equal(mbase.c.mask, [1, 0, 0, 0, 1])
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# Yay, once more !
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mbase.mask = [0, 0, 0, 0, 1]
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assert_equal(mbase.a.mask, [0, 0, 0, 0, 1])
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assert_equal(mbase.b.mask, [0, 0, 0, 0, 1])
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assert_equal(mbase.c.mask, [0, 0, 0, 0, 1])
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def test_set_mask_fromfields(self):
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mbase = self.base.copy().view(mrecarray)
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nmask = np.array(
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[(0, 1, 0), (0, 1, 0), (1, 0, 1), (1, 0, 1), (0, 0, 0)],
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dtype=[('a', bool), ('b', bool), ('c', bool)])
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mbase.mask = nmask
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assert_equal(mbase.a.mask, [0, 0, 1, 1, 0])
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assert_equal(mbase.b.mask, [1, 1, 0, 0, 0])
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assert_equal(mbase.c.mask, [0, 0, 1, 1, 0])
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# Reinitialize and redo
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mbase.mask = False
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mbase.fieldmask = nmask
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assert_equal(mbase.a.mask, [0, 0, 1, 1, 0])
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assert_equal(mbase.b.mask, [1, 1, 0, 0, 0])
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assert_equal(mbase.c.mask, [0, 0, 1, 1, 0])
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def test_set_elements(self):
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base = self.base.copy()
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# Set an element to mask .....................
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mbase = base.view(mrecarray).copy()
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mbase[-2] = masked
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assert_equal(
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mbase._mask.tolist(),
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np.array([(0, 0, 0), (1, 1, 1), (0, 0, 0), (1, 1, 1), (1, 1, 1)],
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dtype=bool))
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# Used to be mask, now it's recordmask!
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assert_equal(mbase.recordmask, [0, 1, 0, 1, 1])
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# Set slices .................................
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mbase = base.view(mrecarray).copy()
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mbase[:2] = (5, 5, 5)
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assert_equal(mbase.a._data, [5, 5, 3, 4, 5])
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assert_equal(mbase.a._mask, [0, 0, 0, 0, 1])
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assert_equal(mbase.b._data, [5., 5., 3.3, 4.4, 5.5])
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assert_equal(mbase.b._mask, [0, 0, 0, 0, 1])
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assert_equal(mbase.c._data,
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[b'5', b'5', b'three', b'four', b'five'])
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assert_equal(mbase.b._mask, [0, 0, 0, 0, 1])
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mbase = base.view(mrecarray).copy()
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mbase[:2] = masked
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assert_equal(mbase.a._data, [1, 2, 3, 4, 5])
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assert_equal(mbase.a._mask, [1, 1, 0, 0, 1])
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assert_equal(mbase.b._data, [1.1, 2.2, 3.3, 4.4, 5.5])
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assert_equal(mbase.b._mask, [1, 1, 0, 0, 1])
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assert_equal(mbase.c._data,
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[b'one', b'two', b'three', b'four', b'five'])
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assert_equal(mbase.b._mask, [1, 1, 0, 0, 1])
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def test_setslices_hardmask(self):
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# Tests setting slices w/ hardmask.
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base = self.base.copy()
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mbase = base.view(mrecarray)
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mbase.harden_mask()
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try:
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mbase[-2:] = (5, 5, 5)
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assert_equal(mbase.a._data, [1, 2, 3, 5, 5])
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assert_equal(mbase.b._data, [1.1, 2.2, 3.3, 5, 5.5])
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assert_equal(mbase.c._data,
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[b'one', b'two', b'three', b'5', b'five'])
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assert_equal(mbase.a._mask, [0, 1, 0, 0, 1])
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assert_equal(mbase.b._mask, mbase.a._mask)
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assert_equal(mbase.b._mask, mbase.c._mask)
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except NotImplementedError:
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# OK, not implemented yet...
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pass
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except AssertionError:
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raise
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else:
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raise Exception("Flexible hard masks should be supported !")
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# Not using a tuple should crash
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try:
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mbase[-2:] = 3
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except (NotImplementedError, TypeError):
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pass
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else:
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raise TypeError("Should have expected a readable buffer object!")
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def test_hardmask(self):
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# Test hardmask
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base = self.base.copy()
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mbase = base.view(mrecarray)
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mbase.harden_mask()
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assert_(mbase._hardmask)
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mbase.mask = nomask
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assert_equal_records(mbase._mask, base._mask)
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mbase.soften_mask()
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assert_(not mbase._hardmask)
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mbase.mask = nomask
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# So, the mask of a field is no longer set to nomask...
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assert_equal_records(mbase._mask,
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ma.make_mask_none(base.shape, base.dtype))
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assert_(ma.make_mask(mbase['b']._mask) is nomask)
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assert_equal(mbase['a']._mask, mbase['b']._mask)
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def test_pickling(self):
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# Test pickling
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base = self.base.copy()
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mrec = base.view(mrecarray)
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for proto in range(2, pickle.HIGHEST_PROTOCOL + 1):
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_ = pickle.dumps(mrec, protocol=proto)
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mrec_ = pickle.loads(_)
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assert_equal(mrec_.dtype, mrec.dtype)
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assert_equal_records(mrec_._data, mrec._data)
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assert_equal(mrec_._mask, mrec._mask)
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assert_equal_records(mrec_._mask, mrec._mask)
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def test_filled(self):
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# Test filling the array
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_a = ma.array([1, 2, 3], mask=[0, 0, 1], dtype=int)
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_b = ma.array([1.1, 2.2, 3.3], mask=[0, 0, 1], dtype=float)
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_c = ma.array(['one', 'two', 'three'], mask=[0, 0, 1], dtype='|S8')
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ddtype = [('a', int), ('b', float), ('c', '|S8')]
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mrec = fromarrays([_a, _b, _c], dtype=ddtype,
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fill_value=(99999, 99999., 'N/A'))
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mrecfilled = mrec.filled()
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assert_equal(mrecfilled['a'], np.array((1, 2, 99999), dtype=int))
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assert_equal(mrecfilled['b'], np.array((1.1, 2.2, 99999.),
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dtype=float))
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assert_equal(mrecfilled['c'], np.array(('one', 'two', 'N/A'),
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dtype='|S8'))
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def test_tolist(self):
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# Test tolist.
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_a = ma.array([1, 2, 3], mask=[0, 0, 1], dtype=int)
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_b = ma.array([1.1, 2.2, 3.3], mask=[0, 0, 1], dtype=float)
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_c = ma.array(['one', 'two', 'three'], mask=[1, 0, 0], dtype='|S8')
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ddtype = [('a', int), ('b', float), ('c', '|S8')]
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mrec = fromarrays([_a, _b, _c], dtype=ddtype,
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fill_value=(99999, 99999., 'N/A'))
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assert_equal(mrec.tolist(),
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[(1, 1.1, None), (2, 2.2, b'two'),
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(None, None, b'three')])
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def test_withnames(self):
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# Test the creation w/ format and names
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x = mrecarray(1, formats=float, names='base')
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x[0]['base'] = 10
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assert_equal(x['base'][0], 10)
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def test_exotic_formats(self):
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# Test that 'exotic' formats are processed properly
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easy = mrecarray(1, dtype=[('i', int), ('s', '|S8'), ('f', float)])
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easy[0] = masked
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assert_equal(easy.filled(1).item(), (1, b'1', 1.))
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solo = mrecarray(1, dtype=[('f0', '<f8', (2, 2))])
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solo[0] = masked
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assert_equal(solo.filled(1).item(),
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np.array((1,), dtype=solo.dtype).item())
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mult = mrecarray(2, dtype="i4, (2,3)float, float")
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mult[0] = masked
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mult[1] = (1, 1, 1)
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mult.filled(0)
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assert_equal_records(mult.filled(0),
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np.array([(0, 0, 0), (1, 1, 1)],
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dtype=mult.dtype))
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class TestView:
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def setup(self):
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(a, b) = (np.arange(10), np.random.rand(10))
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ndtype = [('a', float), ('b', float)]
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arr = np.array(list(zip(a, b)), dtype=ndtype)
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mrec = fromarrays([a, b], dtype=ndtype, fill_value=(-9., -99.))
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mrec.mask[3] = (False, True)
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self.data = (mrec, a, b, arr)
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def test_view_by_itself(self):
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(mrec, a, b, arr) = self.data
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test = mrec.view()
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assert_(isinstance(test, MaskedRecords))
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assert_equal_records(test, mrec)
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assert_equal_records(test._mask, mrec._mask)
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def test_view_simple_dtype(self):
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(mrec, a, b, arr) = self.data
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ntype = (float, 2)
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test = mrec.view(ntype)
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assert_(isinstance(test, ma.MaskedArray))
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assert_equal(test, np.array(list(zip(a, b)), dtype=float))
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assert_(test[3, 1] is ma.masked)
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def test_view_flexible_type(self):
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(mrec, a, b, arr) = self.data
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alttype = [('A', float), ('B', float)]
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test = mrec.view(alttype)
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assert_(isinstance(test, MaskedRecords))
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assert_equal_records(test, arr.view(alttype))
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assert_(test['B'][3] is masked)
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assert_equal(test.dtype, np.dtype(alttype))
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assert_(test._fill_value is None)
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##############################################################################
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class TestMRecordsImport:
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_a = ma.array([1, 2, 3], mask=[0, 0, 1], dtype=int)
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_b = ma.array([1.1, 2.2, 3.3], mask=[0, 0, 1], dtype=float)
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_c = ma.array([b'one', b'two', b'three'],
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mask=[0, 0, 1], dtype='|S8')
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ddtype = [('a', int), ('b', float), ('c', '|S8')]
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mrec = fromarrays([_a, _b, _c], dtype=ddtype,
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fill_value=(b'99999', b'99999.',
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b'N/A'))
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nrec = recfromarrays((_a._data, _b._data, _c._data), dtype=ddtype)
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data = (mrec, nrec, ddtype)
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def test_fromarrays(self):
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_a = ma.array([1, 2, 3], mask=[0, 0, 1], dtype=int)
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_b = ma.array([1.1, 2.2, 3.3], mask=[0, 0, 1], dtype=float)
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_c = ma.array(['one', 'two', 'three'], mask=[0, 0, 1], dtype='|S8')
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(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, delimitor=',', 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]
|