MAINT: Remove implicit inheritance from object class (#15236)

Inheriting from object was necessary for Python 2 compatibility to use
new-style classes. In Python 3, this is unnecessary as there are no
old-style classes.

Dropping the object is more idiomatic Python.

2 files changed, 7 insertions, 7 deletions

diff --git a/numpy/fft/tests/test_helper.py b/numpy/fft/tests/test_helper.py
index dd24139f2..2b457271b 100644
--- a/numpy/fft/tests/test_helper.py
+++ b/numpy/fft/tests/test_helper.py
@@ -8,7 +8,7 @@ from numpy.testing import assert_array_almost_equal, assert_equal
 from numpy import fft, pi
 
 
-class TestFFTShift(object):
+class TestFFTShift:
 
     def test_definition(self):
         x = [0, 1, 2, 3, 4, -4, -3, -2, -1]
@@ -134,7 +134,7 @@ class TestFFTShift(object):
                                               original_ifftshift(inp, axes_keyword))
 
 
-class TestFFTFreq(object):
+class TestFFTFreq:
 
     def test_definition(self):
         x = [0, 1, 2, 3, 4, -4, -3, -2, -1]
@@ -145,7 +145,7 @@ class TestFFTFreq(object):
         assert_array_almost_equal(10*pi*fft.fftfreq(10, pi), x)
 
 
-class TestRFFTFreq(object):
+class TestRFFTFreq:
 
     def test_definition(self):
         x = [0, 1, 2, 3, 4]
@@ -156,7 +156,7 @@ class TestRFFTFreq(object):
         assert_array_almost_equal(10*pi*fft.rfftfreq(10, pi), x)
 
 
-class TestIRFFTN(object):
+class TestIRFFTN:
 
     def test_not_last_axis_success(self):
         ar, ai = np.random.random((2, 16, 8, 32))
diff --git a/numpy/fft/tests/test_pocketfft.py b/numpy/fft/tests/test_pocketfft.py
index 0aa8d0912..da31ec09e 100644
--- a/numpy/fft/tests/test_pocketfft.py
+++ b/numpy/fft/tests/test_pocketfft.py
@@ -19,13 +19,13 @@ def fft1(x):
     return np.sum(x*np.exp(phase), axis=1)
 
 
-class TestFFTShift(object):
+class TestFFTShift:
 
     def test_fft_n(self):
         assert_raises(ValueError, np.fft.fft, [1, 2, 3], 0)
 
 
-class TestFFT1D(object):
+class TestFFT1D:
 
     def test_identity(self):
         maxlen = 512
@@ -220,7 +220,7 @@ def test_fft_with_order(dtype, order, fft):
         raise ValueError()
 
 
-class TestFFTThreadSafe(object):
+class TestFFTThreadSafe:
     threads = 16
     input_shape = (800, 200)