Merge pull request #15403 from WarrenWeckesser/flakes

MAINT: Clean up, mostly unused imports.

20 files changed, 8 insertions, 36 deletions

diff --git a/numpy/core/_add_newdocs.py b/numpy/core/_add_newdocs.py
index cb68b8360..87ae96fa0 100644
--- a/numpy/core/_add_newdocs.py
+++ b/numpy/core/_add_newdocs.py
@@ -8,7 +8,6 @@ NOTE: Many of the methods of ndarray have corresponding functions.
       core/fromnumeric.py, core/defmatrix.py up-to-date.
 
 """
-import sys
 
 from numpy.core import numerictypes as _numerictypes
 from numpy.core import dtype
diff --git a/numpy/core/_exceptions.py b/numpy/core/_exceptions.py
index 88a45561f..99172e23d 100644
--- a/numpy/core/_exceptions.py
+++ b/numpy/core/_exceptions.py
@@ -157,7 +157,6 @@ class _ArrayMemoryError(MemoryError):
     @staticmethod
     def _size_to_string(num_bytes):
         """ Convert a number of bytes into a binary size string """
-        import math
 
         # https://en.wikipedia.org/wiki/Binary_prefix
         LOG2_STEP = 10
diff --git a/numpy/core/arrayprint.py b/numpy/core/arrayprint.py
index ec7e4261f..456ef76f0 100644
--- a/numpy/core/arrayprint.py
+++ b/numpy/core/arrayprint.py
@@ -31,12 +31,12 @@ except ImportError:
 
 import numpy as np
 from . import numerictypes as _nt
-from .umath import absolute, not_equal, isnan, isinf, isfinite, isnat
+from .umath import absolute, isinf, isfinite, isnat
 from . import multiarray
 from .multiarray import (array, dragon4_positional, dragon4_scientific,
                          datetime_as_string, datetime_data, ndarray,
                          set_legacy_print_mode)
-from .fromnumeric import ravel, any
+from .fromnumeric import any
 from .numeric import concatenate, asarray, errstate
 from .numerictypes import (longlong, intc, int_, float_, complex_, bool_,
                            flexible)
diff --git a/numpy/core/fromnumeric.py b/numpy/core/fromnumeric.py
index 213a4438f..46dd961d8 100644
--- a/numpy/core/fromnumeric.py
+++ b/numpy/core/fromnumeric.py
@@ -6,7 +6,6 @@ import types
 import warnings
 
 import numpy as np
-from .. import VisibleDeprecationWarning
 from . import multiarray as mu
 from . import overrides
 from . import umath as um
diff --git a/numpy/core/multiarray.py b/numpy/core/multiarray.py
index d8adc640e..d50c53e30 100644
--- a/numpy/core/multiarray.py
+++ b/numpy/core/multiarray.py
@@ -7,13 +7,10 @@ by importing from the extension module.
 """
 
 import functools
-import sys
 import warnings
-import sys
 
 from . import overrides
 from . import _multiarray_umath
-import numpy as np
 from ._multiarray_umath import *  # noqa: F403
 from ._multiarray_umath import (
     _fastCopyAndTranspose, _flagdict, _insert, _reconstruct, _vec_string,
diff --git a/numpy/core/numeric.py b/numpy/core/numeric.py
index 72c6089b8..f1d7d48f1 100644
--- a/numpy/core/numeric.py
+++ b/numpy/core/numeric.py
@@ -4,10 +4,9 @@ import operator
 import sys
 import warnings
 import numbers
-import contextlib
 
 import numpy as np
-from numpy.compat import pickle, basestring
+from numpy.compat import basestring
 from . import multiarray
 from .multiarray import (
     _fastCopyAndTranspose as fastCopyAndTranspose, ALLOW_THREADS,
diff --git a/numpy/core/records.py b/numpy/core/records.py
index d4aa2feb9..fbef40f72 100644
--- a/numpy/core/records.py
+++ b/numpy/core/records.py
@@ -33,7 +33,6 @@ Record arrays allow us to access fields as properties::
   array([2., 2.])
 
 """
-import sys
 import os
 import warnings
 from collections import Counter, OrderedDict
diff --git a/numpy/core/setup_common.py b/numpy/core/setup_common.py
index 08337a81e..7cac66e61 100644
--- a/numpy/core/setup_common.py
+++ b/numpy/core/setup_common.py
@@ -2,7 +2,6 @@
 import sys
 import warnings
 import copy
-import binascii
 import textwrap
 
 from numpy.distutils.misc_util import mingw32
diff --git a/numpy/core/tests/test_arrayprint.py b/numpy/core/tests/test_arrayprint.py
index 96240be0f..cd3e501a5 100644
--- a/numpy/core/tests/test_arrayprint.py
+++ b/numpy/core/tests/test_arrayprint.py
@@ -837,7 +837,6 @@ class TestPrintOptions:
         assert_raises(TypeError, np.set_printoptions, threshold=b'1')
 
 def test_unicode_object_array():
-    import sys
     expected = "array(['é'], dtype=object)"
     x = np.array([u'\xe9'], dtype=object)
     assert_equal(repr(x), expected)
diff --git a/numpy/core/tests/test_defchararray.py b/numpy/core/tests/test_defchararray.py
index 4c9016c3e..39600553d 100644
--- a/numpy/core/tests/test_defchararray.py
+++ b/numpy/core/tests/test_defchararray.py
@@ -1,10 +1,9 @@
-import sys
 
 import numpy as np
 from numpy.core.multiarray import _vec_string
 from numpy.testing import (
     assert_, assert_equal, assert_array_equal, assert_raises,
-    assert_raises_regex, suppress_warnings,
+    assert_raises_regex
     )
 
 kw_unicode_true = {'unicode': True}  # make 2to3 work properly
diff --git a/numpy/core/tests/test_deprecations.py b/numpy/core/tests/test_deprecations.py
index 252133d7b..01b35ec90 100644
--- a/numpy/core/tests/test_deprecations.py
+++ b/numpy/core/tests/test_deprecations.py
@@ -4,11 +4,9 @@ to document how deprecations should eventually be turned into errors.
 
 """
 import datetime
-import sys
 import operator
 import warnings
 import pytest
-import shutil
 import tempfile
 
 import numpy as np
diff --git a/numpy/core/tests/test_function_base.py b/numpy/core/tests/test_function_base.py
index 7e5ea1cc6..2197ef0cd 100644
--- a/numpy/core/tests/test_function_base.py
+++ b/numpy/core/tests/test_function_base.py
@@ -4,7 +4,6 @@ from numpy import (
     )
 from numpy.testing import (
     assert_, assert_equal, assert_raises, assert_array_equal, assert_allclose,
-    suppress_warnings
     )
 
 
diff --git a/numpy/core/tests/test_indexing.py b/numpy/core/tests/test_indexing.py
index 237e381a7..4bb5cb11a 100644
--- a/numpy/core/tests/test_indexing.py
+++ b/numpy/core/tests/test_indexing.py
@@ -2,7 +2,6 @@ import sys
 import warnings
 import functools
 import operator
-import pytest
 
 import numpy as np
 from numpy.core._multiarray_tests import array_indexing
diff --git a/numpy/core/tests/test_mem_overlap.py b/numpy/core/tests/test_mem_overlap.py
index d3b58d8e8..3e9875f5b 100644
--- a/numpy/core/tests/test_mem_overlap.py
+++ b/numpy/core/tests/test_mem_overlap.py
@@ -1,4 +1,3 @@
-import sys
 import itertools
 import pytest
 
diff --git a/numpy/core/tests/test_scalar_ctors.py b/numpy/core/tests/test_scalar_ctors.py
index d3592a5fc..2de5084b6 100644
--- a/numpy/core/tests/test_scalar_ctors.py
+++ b/numpy/core/tests/test_scalar_ctors.py
@@ -1,13 +1,9 @@
 """
 Test the scalar constructors, which also do type-coercion
 """
-import sys
-import platform
-import pytest
-
 import numpy as np
 from numpy.testing import (
-    assert_equal, assert_almost_equal, assert_raises, assert_warns,
+    assert_equal, assert_almost_equal, assert_warns,
     )
 
 class TestFromString:
diff --git a/numpy/core/tests/test_scalar_methods.py b/numpy/core/tests/test_scalar_methods.py
index c9de3e402..4f5fd2988 100644
--- a/numpy/core/tests/test_scalar_methods.py
+++ b/numpy/core/tests/test_scalar_methods.py
@@ -1,18 +1,14 @@
 """
 Test the scalar constructors, which also do type-coercion
 """
-import os
 import fractions
 import platform
 
 import pytest
 import numpy as np
 
-from numpy.testing import (
-    run_module_suite,
-    assert_equal, assert_almost_equal, assert_raises, assert_warns,
-    dec
-)
+from numpy.testing import assert_equal, assert_raises
+
 
 class TestAsIntegerRatio:
     # derived in part from the cpython test "test_floatasratio"
diff --git a/numpy/core/tests/test_scalarbuffer.py b/numpy/core/tests/test_scalarbuffer.py
index bda1c5333..b8c6dd4aa 100644
--- a/numpy/core/tests/test_scalarbuffer.py
+++ b/numpy/core/tests/test_scalarbuffer.py
@@ -1,7 +1,6 @@
 """
 Test scalar buffer interface adheres to PEP 3118
 """
-import sys
 import numpy as np
 import pytest
 
diff --git a/numpy/core/tests/test_scalarprint.py b/numpy/core/tests/test_scalarprint.py
index 3293d0426..d042eef8b 100644
--- a/numpy/core/tests/test_scalarprint.py
+++ b/numpy/core/tests/test_scalarprint.py
@@ -8,7 +8,7 @@ import pytest
 
 from tempfile import TemporaryFile
 import numpy as np
-from numpy.testing import assert_, assert_equal, suppress_warnings
+from numpy.testing import assert_, assert_equal
 
 class TestRealScalars:
     def test_str(self):
diff --git a/numpy/core/tests/test_shape_base.py b/numpy/core/tests/test_shape_base.py
index 7c23c7128..738260327 100644
--- a/numpy/core/tests/test_shape_base.py
+++ b/numpy/core/tests/test_shape_base.py
@@ -1,5 +1,4 @@
 import pytest
-import sys
 import numpy as np
 from numpy.core import (
     array, arange, atleast_1d, atleast_2d, atleast_3d, block, vstack, hstack,
diff --git a/numpy/core/tests/test_unicode.py b/numpy/core/tests/test_unicode.py
index f16789148..ac065d5d6 100644
--- a/numpy/core/tests/test_unicode.py
+++ b/numpy/core/tests/test_unicode.py
@@ -1,5 +1,3 @@
-import sys
-
 import numpy as np
 from numpy.compat import unicode
 from numpy.testing import assert_, assert_equal, assert_array_equal