Fix a minor flake8 issue

Author: Cito

graphql/utilities/find_breaking_changes.py

@@ -444,37 +444,28 @@ def is_change_safe_for_object_or_interface_field(
     if is_named_type(old_type):
         return (
             # if they're both named types, see if their names are equivalent
-            (
-                is_named_type(new_type)
-                and cast(GraphQLNamedType, old_type).name
-                == cast(GraphQLNamedType, new_type).name
-            )
-            or
+            is_named_type(new_type)
+            and cast(GraphQLNamedType, old_type).name
+            == cast(GraphQLNamedType, new_type).name
+        ) or (
             # moving from nullable to non-null of same underlying type is safe
-            (
-                is_non_null_type(new_type)
-                and is_change_safe_for_object_or_interface_field(
-                    old_type, cast(GraphQLNonNull, new_type).of_type
-                )
+            is_non_null_type(new_type)
+            and is_change_safe_for_object_or_interface_field(
+                old_type, cast(GraphQLNonNull, new_type).of_type
             )
         )
     elif is_list_type(old_type):
         return (
             # if they're both lists, make sure underlying types are compatible
-            (
-                is_list_type(new_type)
-                and is_change_safe_for_object_or_interface_field(
-                    cast(GraphQLList, old_type).of_type,
-                    cast(GraphQLList, new_type).of_type,
-                )
+            is_list_type(new_type)
+            and is_change_safe_for_object_or_interface_field(
+                cast(GraphQLList, old_type).of_type, cast(GraphQLList, new_type).of_type
             )
-            or
+        ) or (
             # moving from nullable to non-null of same underlying type is safe
-            (
-                is_non_null_type(new_type)
-                and is_change_safe_for_object_or_interface_field(
-                    old_type, cast(GraphQLNonNull, new_type).of_type
-                )
+            is_non_null_type(new_type)
+            and is_change_safe_for_object_or_interface_field(
+                old_type, cast(GraphQLNonNull, new_type).of_type
             )
         )
     elif is_non_null_type(old_type):
@@ -493,36 +484,33 @@ def is_change_safe_for_input_object_field_or_field_arg(
     old_type: GraphQLType, new_type: GraphQLType
 ) -> bool:
     if is_named_type(old_type):
-        # if they're both named types, see if their names are equivalent
         return (
+            # if they're both named types, see if their names are equivalent
             is_named_type(new_type)
             and cast(GraphQLNamedType, old_type).name
             == cast(GraphQLNamedType, new_type).name
         )
     elif is_list_type(old_type):
-        # if they're both lists, make sure underlying types are compatible
+
         return is_list_type(
+            # if they're both lists, make sure underlying types are compatible
             new_type
         ) and is_change_safe_for_input_object_field_or_field_arg(
             cast(GraphQLList, old_type).of_type, cast(GraphQLList, new_type).of_type
         )
     elif is_non_null_type(old_type):
         return (
             # if they're both non-null, make sure the underlying types are compatible
-            (
-                is_non_null_type(new_type)
-                and is_change_safe_for_input_object_field_or_field_arg(
-                    cast(GraphQLNonNull, old_type).of_type,
-                    cast(GraphQLNonNull, new_type).of_type,
-                )
+            is_non_null_type(new_type)
+            and is_change_safe_for_input_object_field_or_field_arg(
+                cast(GraphQLNonNull, old_type).of_type,
+                cast(GraphQLNonNull, new_type).of_type,
             )
-            or
+        ) or (
             # moving from non-null to nullable of same underlying type is safe
-            (
-                not is_non_null_type(new_type)
-                and is_change_safe_for_input_object_field_or_field_arg(
-                    cast(GraphQLNonNull, old_type).of_type, new_type
-                )
+            not is_non_null_type(new_type)
+            and is_change_safe_for_input_object_field_or_field_arg(
+                cast(GraphQLNonNull, old_type).of_type, new_type
             )
         )
     else:

tox.ini

@@ -7,19 +7,19 @@ python =
     3.6: py36
 
 [testenv:black]
-basepython = python
+basepython = python3.6
 deps = black
 commands  =
     black graphql tests --check
 
 [testenv:flake8]
-basepython = python
+basepython = python3.6
 deps = flake8
 commands =
     flake8 graphql tests
 
 [testenv:mypy]
-basepython = python
+basepython = python3.6
 deps = mypy
 commands =
     mypy graphql