fix linting complaints

chempy/chemistry.py

@@ -456,9 +456,8 @@ def _init_stoich(container):
         if isinstance(container, set):
             container = {k: 1 for k in container}
         container = container or {}
-        if (
-            type(container) == dict
-        ):  # we don't want isinstance here in case of OrderedDict
+        if type(container) == dict:  # noqa
+            # we don't want isinstance here in case of OrderedDict
             container = OrderedDict(sorted(container.items(), key=lambda kv: kv[0]))
         return container
 
@@ -1456,11 +1455,10 @@ def balance_stoichiometry(
         substances = OrderedDict(
             [(k, substance_factory(k)) for k in substances.split()]
         )
-    if (
-        type(reactants) == set
-    ):  # we don't want isinstance since it might be "OrderedSet"
+    if type(reactants) == set:  # noqa
+        # we don't want isinstance since it might be "OrderedSet"
         reactants = sorted(reactants)
-    if type(products) == set:
+    if type(products) == set:  # noqa
         products = sorted(products)
     subst_keys = list(reactants) + list(products)