Apply ruff/pycodestyle rule E711

E711 Comparison to `None` should be `cond is not None`

Author: DimitriPapadopoulos

src/c/test_c.py

@@ -431,7 +431,7 @@ def test_reading_pointer_to_pointer():
     assert p[0] is not None
     assert p[0] == cast(BVoidP, 0)
     assert p[0] == cast(BCharP, 0)
-    assert p[0] != None
+    assert p[0] is not None
     assert repr(p[0]) == "<cdata 'int *' NULL>"
     p[0] = q
     assert p[0] != cast(BVoidP, 0)
@@ -466,12 +466,12 @@ def test_no_len_on_nonarray():
 def test_cmp_none():
     p = new_primitive_type("int")
     x = cast(p, 42)
-    assert (x == None) is False
-    assert (x != None) is True
+    assert (x is None) is False
+    assert (x is not None) is True
     assert (x == ["hello"]) is False
     assert (x != ["hello"]) is True
     y = cast(p, 0)
-    assert (y == None) is False
+    assert (y is None) is False
 
 def test_invalid_indexing():
     p = new_primitive_type("int")

testing/cffi0/backend_tests.py

@@ -207,7 +207,7 @@ def test_pointer_direct(self):
         assert p is not None
         assert bool(p) is False
         assert p == ffi.cast("int*", 0)
-        assert p != None
+        assert p is not None
         assert repr(p) == "<cdata 'int *' NULL>"
         a = ffi.new("int[]", [123, 456])
         p = ffi.cast("int*", a)
@@ -397,7 +397,7 @@ def test_none_as_null_doesnt_work(self):
         ffi = FFI(backend=self.Backend())
         p = ffi.new("int*[1]")
         assert p[0] is not None
-        assert p[0] != None
+        assert p[0] is not None
         assert p[0] == ffi.NULL
         assert repr(p[0]) == "<cdata 'int *' NULL>"
         #
@@ -1154,14 +1154,14 @@ def test_pointer_comparison(self):
         assert (p >  q) is False
         assert (p >= q) is False
         #
-        assert (None == s) is False
-        assert (None != s) is True
-        assert (s == None) is False
-        assert (s != None) is True
-        assert (None == q) is False
-        assert (None != q) is True
-        assert (q == None) is False
-        assert (q != None) is True
+        assert (None is s) is False
+        assert (None is not s) is True
+        assert (s is None) is False
+        assert (s is not None) is True
+        assert (None is q) is False
+        assert (None is not q) is True
+        assert (q is None) is False
+        assert (q is not None) is True
 
     def test_integer_comparison(self):
         ffi = FFI(backend=self.Backend())

testing/cffi1/test_new_ffi_1.py

@@ -266,7 +266,7 @@ def test_pointer_direct(self):
         assert p is not None
         assert bool(p) is False
         assert p == ffi.cast("int*", 0)
-        assert p != None
+        assert p is not None
         assert repr(p) == "<cdata 'int *' NULL>"
         a = ffi.new("int[]", [123, 456])
         p = ffi.cast("int*", a)
@@ -447,7 +447,7 @@ def test_wchar_t(self):
     def test_none_as_null_doesnt_work(self):
         p = ffi.new("int*[1]")
         assert p[0] is not None
-        assert p[0] != None
+        assert p[0] is not None
         assert p[0] == ffi.NULL
         assert repr(p[0]) == "<cdata 'int *' NULL>"
         #
@@ -1131,14 +1131,14 @@ def test_pointer_comparison(self):
         assert (p >  q) is False
         assert (p >= q) is False
         #
-        assert (None == s) is False
-        assert (None != s) is True
-        assert (s == None) is False
-        assert (s != None) is True
-        assert (None == q) is False
-        assert (None != q) is True
-        assert (q == None) is False
-        assert (q != None) is True
+        assert (None is s) is False
+        assert (None is not s) is True
+        assert (s is None) is False
+        assert (s is not None) is True
+        assert (None is q) is False
+        assert (None is not q) is True
+        assert (q is None) is False
+        assert (q is not None) is True
 
     def test_integer_comparison(self):
         x = ffi.cast("int", 123)

testing/cffi1/test_zdist.py

@@ -43,7 +43,7 @@ def run(self, args, cwd=None):
         # NOTE: pointing $HOME to a nonexistent directory can break certain things
         # that look there for configuration (like ccache).
         tmp_home = mkdtemp()
-        assert tmp_home != None, "cannot create temporary homedir"
+        assert tmp_home is not None, "cannot create temporary homedir"
         env['HOME'] = tmp_home
         pathlist = sys.path[:]
         if cwd is None: