replace everywhere: 'is [not] None' -> '(==|!=) None'

state/test/test_read_dict_keys.py

@@ -3,7 +3,7 @@ import pytest
 
 @pytest.mark.usefixtures("state")
 def test_read_dict_keys_no_exists(state):
-    assert state.read_dict_keys(100000) is None
+    assert state.read_dict_keys(100000) == None
 
 
 @pytest.mark.usefixtures("state")
@@ -13,14 +13,14 @@ def test_read_dict_keys_simple(state):
     c = state.create_nodevalue("f")
     d = state.create_edge(a, b)
     e = state.create_edge(d, c)
-    assert a is not None
-    assert b is not None
-    assert c is not None
-    assert d is not None
-    assert e is not None
+    assert a != None
+    assert b != None
+    assert c != None
+    assert d != None
+    assert e != None
 
     l = state.read_dict_keys(a)
-    assert l is not None
+    assert l != None
     assert set(l) == set([c])
 
 
@@ -31,21 +31,21 @@ def test_read_dict_keys_multi(state):
     c = state.create_nodevalue("f")
     d = state.create_edge(a, b)
     e = state.create_edge(d, c)
-    assert a is not None
-    assert b is not None
-    assert c is not None
-    assert d is not None
-    assert e is not None
+    assert a != None
+    assert b != None
+    assert c != None
+    assert d != None
+    assert e != None
 
     g = state.create_node()
     h = state.create_nodevalue("k")
     i = state.create_edge(a, g)
     j = state.create_edge(i, h)
-    assert g is not None
-    assert h is not None
-    assert i is not None
-    assert j is not None
+    assert g != None
+    assert h != None
+    assert i != None
+    assert j != None
 
     l = state.read_dict_keys(a)
-    assert l is not None
+    assert l != None
     assert set(l) == set([c, h])