MAINT: apply ruff/pyupgrade rule UP039

UP039 Unnecessary parentheses after class definition

Author: DimitriPapadopoulos

numpy/_core/tests/test_array_coercion.py

@@ -38,7 +38,7 @@ def subclass(a):
 
     yield subclass
 
-    class _SequenceLike():
+    class _SequenceLike:
         # Older NumPy versions, sometimes cared whether a protocol array was
         # also _SequenceLike.  This shouldn't matter, but keep it for now
         # for __array__ and not the others.

numpy/_core/tests/test_multiarray.py

@@ -234,7 +234,7 @@ def test_readonly_flag_protocols(self, flag, flag_value, writeable):
         a = np.arange(10)
         setattr(a.flags, flag, flag_value)
 
-        class MyArr():
+        class MyArr:
             __array_struct__ = a.__array_struct__
 
         assert memoryview(a).readonly is not writeable
@@ -7247,7 +7247,7 @@ def test_matmul_empty(self):
 
     def test_matmul_exception_multiply(self):
         # test that matmul fails if `__mul__` is missing
-        class add_not_multiply():
+        class add_not_multiply:
             def __add__(self, other):
                 return self
         a = np.full((3,3), add_not_multiply())
@@ -7256,7 +7256,7 @@ def __add__(self, other):
 
     def test_matmul_exception_add(self):
         # test that matmul fails if `__add__` is missing
-        class multiply_not_add():
+        class multiply_not_add:
             def __mul__(self, other):
                 return self
         a = np.full((3,3), multiply_not_add())
@@ -8677,7 +8677,7 @@ def test_multiarray_flags_not_writable_attribute_deletion(self):
             assert_raises(AttributeError, delattr, a, s)
 
 
-class TestArrayInterface():
+class TestArrayInterface:
     class Foo:
         def __init__(self, value):
             self.value = value

numpy/_core/tests/test_overrides.py

@@ -540,7 +540,7 @@ def __array_function__(self, func, types, args, kwargs):
 
 class TestArrayLike:
     def setup_method(self):
-        class MyArray():
+        class MyArray:
             def __init__(self, function=None):
                 self.function = function
 
@@ -554,7 +554,7 @@ def __array_function__(self, func, types, args, kwargs):
 
         self.MyArray = MyArray
 
-        class MyNoArrayFunctionArray():
+        class MyNoArrayFunctionArray:
             def __init__(self, function=None):
                 self.function = function
 

numpy/f2py/tests/test_crackfortran.py

@@ -66,7 +66,7 @@ def test_nowrap_private_proceedures(self, tmp_path):
         pyf = crackfortran.crack2fortran(mod)
         assert 'bar' not in pyf
 
-class TestModuleProcedure():
+class TestModuleProcedure:
     def test_moduleOperators(self, tmp_path):
         fpath = util.getpath("tests", "src", "crackfortran", "operators.f90")
         mod = crackfortran.crackfortran([str(fpath)])
@@ -347,14 +347,14 @@ def test_end_if_comment(self):
             assert False, f"'crackfortran.crackfortran' raised an exception {exc}"
 
 
-class TestF77CommonBlockReader():
+class TestF77CommonBlockReader:
     def test_gh22648(self, tmp_path):
         fpath = util.getpath("tests", "src", "crackfortran", "gh22648.pyf")
         with contextlib.redirect_stdout(io.StringIO()) as stdout_f2py:
             mod = crackfortran.crackfortran([str(fpath)])
         assert "Mismatch" not in stdout_f2py.getvalue()
 
-class TestParamEval():
+class TestParamEval:
     # issue gh-11612, array parameter parsing
     def test_param_eval_nested(self):
         v = '(/3.14, 4./)'

numpy/lib/_version.py

@@ -11,7 +11,7 @@
 __all__ = ['NumpyVersion']
 
 
-class NumpyVersion():
+class NumpyVersion:
     """Parse and compare numpy version strings.
 
     NumPy has the following versioning scheme (numbers given are examples; they

numpy/lib/tests/test_packbits.py

@@ -282,7 +282,7 @@ def test_unpackbits_large():
     assert_array_equal(np.packbits(np.unpackbits(d, axis=0), axis=0), d)
 
 
-class TestCount():
+class TestCount:
     x = np.array([
         [1, 0, 1, 0, 0, 1, 0],
         [0, 1, 1, 1, 0, 0, 0],

numpy/lib/tests/test_regression.py

@@ -215,7 +215,7 @@ def test_nansum_with_boolean(self):
     def test_py3_compat(self):
         # gh-2561
         # Test if the oldstyle class test is bypassed in python3
-        class C():
+        class C:
             """Old-style class in python2, normal class in python3"""
             pass
 

numpy/ma/tests/test_core.py

@@ -251,7 +251,7 @@ def test_creation_with_list_of_maskedarrays_no_bool_cast(self):
 
         # The above only failed due a long chain of oddity, try also with
         # an object array that cannot be converted to bool always:
-        class NotBool():
+        class NotBool:
             def __bool__(self):
                 raise ValueError("not a bool!")
         masked_obj = np.ma.masked_array([NotBool(), 'b'], mask=[True, False])
@@ -4631,7 +4631,7 @@ def test_masked_invalid_pandas(self):
         # getdata() used to be bad for pandas series due to its _data
         # attribute.  This test is a regression test mainly and may be
         # removed if getdata() is adjusted.
-        class Series():
+        class Series:
             _data = "nonsense"
 
             def __array__(self, dtype=None, copy=None):