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test_deprecations.py
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""" Tests related to deprecation warnings. Also a convenient place to document how deprecations should eventually be turned into errors. """ from __future__ import division, absolute_import, print_function import datetime import sys import operator import warnings import numpy as np from numpy.testing import ( run_module_suite, assert_raises, assert_warns, assert_no_warnings, assert_array_equal, assert_, dec) try: import pytz _has_pytz = True except ImportError: _has_pytz = False class _DeprecationTestCase(object): # Just as warning: warnings uses re.match, so the start of this message # must match. message = '' warning_cls = DeprecationWarning def setUp(self): self.warn_ctx = warnings.catch_warnings(record=True) self.log = self.warn_ctx.__enter__() # Do *not* ignore other DeprecationWarnings. Ignoring warnings # can give very confusing results because of # http://bugs.python.org/issue4180 and it is probably simplest to # try to keep the tests cleanly giving only the right warning type. # (While checking them set to "error" those are ignored anyway) # We still have them show up, because otherwise they would be raised warnings.filterwarnings("always", category=self.warning_cls) warnings.filterwarnings("always", message=self.message, category=self.warning_cls) def tearDown(self): self.warn_ctx.__exit__() def assert_deprecated(self, function, num=1, ignore_others=False, function_fails=False, exceptions=np._NoValue, args=(), kwargs={}): """Test if DeprecationWarnings are given and raised. This first checks if the function when called gives `num` DeprecationWarnings, after that it tries to raise these DeprecationWarnings and compares them with `exceptions`. The exceptions can be different for cases where this code path is simply not anticipated and the exception is replaced. Parameters ---------- function : callable The function to test num : int Number of DeprecationWarnings to expect. This should normally be 1. ignore_others : bool Whether warnings of the wrong type should be ignored (note that the message is not checked) function_fails : bool If the function would normally fail, setting this will check for warnings inside a try/except block. exceptions : Exception or tuple of Exceptions Exception to expect when turning the warnings into an error. The default checks for DeprecationWarnings. If exceptions is empty the function is expected to run successfully. args : tuple Arguments for `function` kwargs : dict Keyword arguments for `function` """ # reset the log self.log[:] = [] if exceptions is np._NoValue: exceptions = (self.warning_cls,) try: function(*args, **kwargs) except (Exception if function_fails else tuple()): pass # just in case, clear the registry num_found = 0 for warning in self.log: if warning.category is self.warning_cls: num_found += 1 elif not ignore_others: raise AssertionError( "expected %s but got: %s" % (self.warning_cls.__name__, warning.category)) if num is not None and num_found != num: msg = "%i warnings found but %i expected." % (len(self.log), num) lst = [str(w.category) for w in self.log] raise AssertionError("\n".join([msg] + lst)) with warnings.catch_warnings(): warnings.filterwarnings("error", message=self.message, category=self.warning_cls) try: function(*args, **kwargs) if exceptions != tuple(): raise AssertionError( "No error raised during function call") except exceptions: if exceptions == tuple(): raise AssertionError( "Error raised during function call") def assert_not_deprecated(self, function, args=(), kwargs={}): """Test that warnings are not raised. This is just a shorthand for: self.assert_deprecated(function, num=0, ignore_others=True, exceptions=tuple(), args=args, kwargs=kwargs) """ self.assert_deprecated(function, num=0, ignore_others=True, exceptions=tuple(), args=args, kwargs=kwargs) class _VisibleDeprecationTestCase(_DeprecationTestCase): warning_cls = np.VisibleDeprecationWarning class TestBooleanBinaryMinusDeprecation(_DeprecationTestCase): """Test deprecation of binary boolean `-`. While + and * are well defined, binary - is not and even a corrected form seems to have no real uses. The deprecation process was started in NumPy 1.9. """ message = r"numpy boolean subtract, the `-` operator, .*" def test_operator_deprecation(self): array = np.array([True]) generic = np.bool_(True) # Minus operator/subtract ufunc: self.assert_deprecated(operator.sub, args=(array, array)) self.assert_deprecated(operator.sub, args=(generic, generic)) class TestRankDeprecation(_DeprecationTestCase): """Test that np.rank is deprecated. The function should simply be removed. The VisibleDeprecationWarning may become unnecessary. """ def test(self): a = np.arange(10) assert_warns(np.VisibleDeprecationWarning, np.rank, a) class TestComparisonDeprecations(_DeprecationTestCase): """This tests the deprecation, for non-element-wise comparison logic. This used to mean that when an error occurred during element-wise comparison (i.e. broadcasting) NotImplemented was returned, but also in the comparison itself, False was given instead of the error. Also test FutureWarning for the None comparison. """ message = "elementwise.* comparison failed; .*" def test_normal_types(self): for op in (operator.eq, operator.ne): # Broadcasting errors: self.assert_deprecated(op, args=(np.zeros(3), [])) a = np.zeros(3, dtype='i,i') # (warning is issued a couple of times here) self.assert_deprecated(op, args=(a, a[:-1]), num=None) # Element comparison error (numpy array can't be compared). a = np.array([1, np.array([1,2,3])], dtype=object) b = np.array([1, np.array([1,2,3])], dtype=object) self.assert_deprecated(op, args=(a, b), num=None) def test_string(self): # For two string arrays, strings always raised the broadcasting error: a = np.array(['a', 'b']) b = np.array(['a', 'b', 'c']) assert_raises(ValueError, lambda x, y: x == y, a, b) # The empty list is not cast to string, as this is only to document # that fact (it likely should be changed). This means that the # following works (and returns False) due to dtype mismatch: a == [] def test_void_dtype_equality_failures(self): class NotArray(object): def __array__(self): raise TypeError # Needed so Python 3 does not raise DeprecationWarning twice. def __ne__(self, other): return NotImplemented self.assert_deprecated(lambda: np.arange(2) == NotArray()) self.assert_deprecated(lambda: np.arange(2) != NotArray()) struct1 = np.zeros(2, dtype="i4,i4") struct2 = np.zeros(2, dtype="i4,i4,i4") assert_warns(FutureWarning, lambda: struct1 == 1) assert_warns(FutureWarning, lambda: struct1 == struct2) assert_warns(FutureWarning, lambda: struct1 != 1) assert_warns(FutureWarning, lambda: struct1 != struct2) def test_array_richcompare_legacy_weirdness(self): # It doesn't really work to use assert_deprecated here, b/c part of # the point of assert_deprecated is to check that when warnings are # set to "error" mode then the error is propagated -- which is good! # But here we are testing a bunch of code that is deprecated *because* # it has the habit of swallowing up errors and converting them into # different warnings. So assert_warns will have to be sufficient. assert_warns(FutureWarning, lambda: np.arange(2) == "a") assert_warns(FutureWarning, lambda: np.arange(2) != "a") # No warning for scalar comparisons with warnings.catch_warnings(): warnings.filterwarnings("error") assert_(not (np.array(0) == "a")) assert_(np.array(0) != "a") assert_(not (np.int16(0) == "a")) assert_(np.int16(0) != "a") for arg1 in [np.asarray(0), np.int16(0)]: struct = np.zeros(2, dtype="i4,i4") for arg2 in [struct, "a"]: for f in [operator.lt, operator.le, operator.gt, operator.ge]: if sys.version_info[0] >= 3: # py3 with warnings.catch_warnings() as l: warnings.filterwarnings("always") assert_raises(TypeError, f, arg1, arg2) assert_(not l) else: # py2 assert_warns(DeprecationWarning, f, arg1, arg2) class TestDatetime64Timezone(_DeprecationTestCase): """Parsing of datetime64 with timezones deprecated in 1.11.0, because datetime64 is now timezone naive rather than UTC only. It will be quite a while before we can remove this, because, at the very least, a lot of existing code uses the 'Z' modifier to avoid conversion from local time to UTC, even if otherwise it handles time in a timezone naive fashion. """ def test_string(self): self.assert_deprecated(np.datetime64, args=('2000-01-01T00+01',)) self.assert_deprecated(np.datetime64, args=('2000-01-01T00Z',)) @dec.skipif(not _has_pytz, "The pytz module is not available.") def test_datetime(self): tz = pytz.timezone('US/Eastern') dt = datetime.datetime(2000, 1, 1, 0, 0, tzinfo=tz) self.assert_deprecated(np.datetime64, args=(dt,)) class TestNonCContiguousViewDeprecation(_DeprecationTestCase): """View of non-C-contiguous arrays deprecated in 1.11.0. The deprecation will not be raised for arrays that are both C and F contiguous, as C contiguous is dominant. There are more such arrays with relaxed stride checking than without so the deprecation is not as visible with relaxed stride checking in force. """ def test_fortran_contiguous(self): self.assert_deprecated(np.ones((2,2)).T.view, args=(np.complex,)) self.assert_deprecated(np.ones((2,2)).T.view, args=(np.int8,)) class TestInvalidOrderParameterInputForFlattenArrayDeprecation(_DeprecationTestCase): """Invalid arguments to the ORDER parameter in array.flatten() should not be allowed and should raise an error. However, in the interests of not breaking code that may inadvertently pass invalid arguments to this parameter, a DeprecationWarning will be issued instead for the time being to give developers time to refactor relevant code. """ def test_flatten_array_non_string_arg(self): x = np.zeros((3, 5)) self.message = ("Non-string object detected for " "the array ordering. Please pass " "in 'C', 'F', 'A', or 'K' instead") self.assert_deprecated(x.flatten, args=(np.pi,)) def test_flatten_array_invalid_string_arg(self): # Tests that a DeprecationWarning is raised # when a string of length greater than one # starting with "C", "F", "A", or "K" (case- # and unicode-insensitive) is passed in for # the ORDER parameter. Otherwise, a TypeError # will be raised! x = np.zeros((3, 5)) self.message = ("Non length-one string passed " "in for the array ordering. Please " "pass in 'C', 'F', 'A', or 'K' instead") self.assert_deprecated(x.flatten, args=("FACK",)) class TestArrayDataAttributeAssignmentDeprecation(_DeprecationTestCase): """Assigning the 'data' attribute of an ndarray is unsafe as pointed out in gh-7093. Eventually, such assignment should NOT be allowed, but in the interests of maintaining backwards compatibility, only a Deprecation- Warning will be raised instead for the time being to give developers time to refactor relevant code. """ def test_data_attr_assignment(self): a = np.arange(10) b = np.linspace(0, 1, 10) self.message = ("Assigning the 'data' attribute is an " "inherently unsafe operation and will " "be removed in the future.") self.assert_deprecated(a.__setattr__, args=('data', b.data)) class TestLinspaceInvalidNumParameter(_DeprecationTestCase): """Argument to the num parameter in linspace that cannot be safely interpreted as an integer is deprecated in 1.12.0. Argument to the num parameter in linspace that cannot be safely interpreted as an integer should not be allowed. In the interest of not breaking code that passes an argument that could still be interpreted as an integer, a DeprecationWarning will be issued for the time being to give developers time to refactor relevant code. """ def test_float_arg(self): # 2016-02-25, PR#7328 self.assert_deprecated(np.linspace, args=(0, 10, 2.5)) class TestBinaryReprInsufficientWidthParameterForRepresentation(_DeprecationTestCase): """ If a 'width' parameter is passed into ``binary_repr`` that is insufficient to represent the number in base 2 (positive) or 2's complement (negative) form, the function used to silently ignore the parameter and return a representation using the minimal number of bits needed for the form in question. Such behavior is now considered unsafe from a user perspective and will raise an error in the future. """ def test_insufficient_width_positive(self): args = (10,) kwargs = {'width': 2} self.message = ("Insufficient bit width provided. This behavior " "will raise an error in the future.") self.assert_deprecated(np.binary_repr, args=args, kwargs=kwargs) def test_insufficient_width_negative(self): args = (-5,) kwargs = {'width': 2} self.message = ("Insufficient bit width provided. This behavior " "will raise an error in the future.") self.assert_deprecated(np.binary_repr, args=args, kwargs=kwargs) class TestNumericStyleTypecodes(_DeprecationTestCase): """ Deprecate the old numeric-style dtypes, which are especially confusing for complex types, e.g. Complex32 -> complex64. When the deprecation cycle is complete, the check for the strings should be removed from PyArray_DescrConverter in descriptor.c, and the deprecated keys should not be added as capitalized aliases in _add_aliases in numerictypes.py. """ def test_all_dtypes(self): deprecated_types = [ 'Bool', 'Complex32', 'Complex64', 'Float16', 'Float32', 'Float64', 'Int8', 'Int16', 'Int32', 'Int64', 'Object0', 'Timedelta64', 'UInt8', 'UInt16', 'UInt32', 'UInt64', 'Void0' ] if sys.version_info[0] < 3: deprecated_types.extend(['Unicode0', 'String0']) for dt in deprecated_types: self.assert_deprecated(np.dtype, exceptions=(TypeError,), args=(dt,)) class TestAccumulateKeepDims(_DeprecationTestCase): """ Deprecate the keepdims argument to np.ufunc.accumulate, which was never used or documented """ def test_keepdims(self): with warnings.catch_warnings(): warnings.filterwarnings('always', '', FutureWarning) assert_warns(FutureWarning, np.add.accumulate, [1], keepdims=True) class TestTestDeprecated(object): def test_assert_deprecated(self): test_case_instance = _DeprecationTestCase() test_case_instance.setUp() assert_raises(AssertionError, test_case_instance.assert_deprecated, lambda: None) def foo(): warnings.warn("foo", category=DeprecationWarning, stacklevel=2) test_case_instance.assert_deprecated(foo) test_case_instance.tearDown() class TestClassicIntDivision(_DeprecationTestCase): """ See #7949. Deprecate the numeric-style dtypes with -3 flag in python 2 if used for division List of data types: http://docs.scipy.org/doc/numpy/user/basics.types.html """ def test_int_dtypes(self): #scramble types and do some mix and match testing deprecated_types = [ 'bool_', 'int_', 'intc', 'uint8', 'int8', 'uint64', 'int32', 'uint16', 'intp', 'int64', 'uint32', 'int16' ] if sys.version_info[0] < 3 and sys.py3kwarning: import operator as op dt2 = 'bool_' for dt1 in deprecated_types: a = np.array([1,2,3], dtype=dt1) b = np.array([1,2,3], dtype=dt2) self.assert_deprecated(op.div, args=(a,b)) dt2 = dt1 class TestNonNumericConjugate(_DeprecationTestCase): """ Deprecate no-op behavior of ndarray.conjugate on non-numeric dtypes, which conflicts with the error behavior of np.conjugate. """ def test_conjugate(self): for a in np.array(5), np.array(5j): self.assert_not_deprecated(a.conjugate) for a in (np.array('s'), np.array('2016', 'M'), np.array((1, 2), [('a', int), ('b', int)])): self.assert_deprecated(a.conjugate) class TestNPY_CHAR(_DeprecationTestCase): # 2017-05-03, 1.13.0 def test_npy_char_deprecation(self): from numpy.core.multiarray_tests import npy_char_deprecation self.assert_deprecated(npy_char_deprecation) assert_(npy_char_deprecation() == 'S1') if __name__ == "__main__": run_module_suite()