flake8 cleanup

tests/test_cpp_base_py_derived.py

@@ -2,37 +2,35 @@
 # pybind11 equivalent of Boost.Python test:
 # https://github.com/rwgk/rwgk_tbx/blob/6c9a6d6bc72d5c1b8609724433259c5b47178680/tst_cpp_base_py_derived.py
 # See also: https://github.com/pybind/pybind11/issues/1333 (this was the starting point)
-import pytest
 
 from pybind11_tests import cpp_base_py_derived as m
 
 
-class drvd(m.base):
+class drvd(m.base):  # noqa: N801
+    def __init__(self, _num=200):
+        super().__init__()
+        self._drvd_num = _num
 
-  def __init__(self, _num = 200):
-    super().__init__()
-    self._drvd_num = _num
+    def get_num(self):
+        return self._drvd_num
 
-  def get_num(self):
-    return self._drvd_num
-
-  def clone(self):
-    return drvd(250)
+    def clone(self):
+        return drvd(250)
 
 
 def test_base():
-  b = m.base()
-  assert b.get_num() == 100
-  assert m.get_num(b) == 100
-  bc = b.clone()
-  assert bc.get_num() == 150
-  assert m.clone_get_num(b) == 103157
+    b = m.base()
+    assert b.get_num() == 100
+    assert m.get_num(b) == 100
+    bc = b.clone()
+    assert bc.get_num() == 150
+    assert m.clone_get_num(b) == 103157
 
 
 def test_drvd():
-  d = drvd()
-  assert d.get_num() == 200
-  assert m.get_num(d) == 200
-  dc = d.clone()
-  assert dc.get_num() == 250
-  assert m.clone_get_num(d) == 203257
+    d = drvd()
+    assert d.get_num() == 200
+    assert m.get_num(d) == 200
+    dc = d.clone()
+    assert dc.get_num() == 250
+    assert m.clone_get_num(d) == 203257

tests/test_private_first_base.py

 # -*- coding: utf-8 -*-
-import pytest
 
 from pybind11_tests import private_first_base as m
 

tests/test_smart_ptr_base_derived.py

@@ -7,6 +7,7 @@ CBASE_GET_INT_RESULT = 90146438
 CDERIVED_GET_INT_RESULT = 31607978
 VDERIVED_GET_INT_RESULT = 29852452
 
+
 def test_concrete():
     m.to_cout("")
     m.to_cout("")
@@ -22,6 +23,7 @@ def test_concrete():
         m.pass_shared_cderived(cb)
     m.to_cout("")
 
+
 def test_virtual():
     m.to_cout("")
     m.to_cout("")

tests/test_smart_ptr_private_first_base.py

 # -*- coding: utf-8 -*-
-import pytest
 
 from pybind11_tests import smart_ptr_private_first_base as m
 

tests/test_type_caster_bare_interface_demo.py

 # -*- coding: utf-8 -*-
-import pytest
 
 from pybind11_tests import type_caster_bare_interface_demo as m