Add pre-commit tool to repository, and run on all files.

.gitignore

@@ -46,6 +46,7 @@ htmlcov/
 nosetests.xml
 coverage.xml
 *,cover
+.pytest_cache/
 
 # Translations
 *.mo

.pre-commit-config.yaml

@@ -0,0 +1,18 @@
+-   repo: git://github.com/pre-commit/pre-commit-hooks
+    sha: v0.8.0
+    hooks:
+    -   id: autopep8-wrapper
+        args:
+        - -i
+        - --ignore=E128,E309,E501
+        exclude: ^docs/.*$
+    -   id: check-json
+    -   id: check-yaml
+    -   id: debug-statements
+    -   id: end-of-file-fixer
+        exclude: ^docs/.*$
+    -   id: trailing-whitespace
+    -   id: pretty-format-json
+        args:
+        - --autofix
+        - --indent=4

README.md

@@ -17,13 +17,13 @@ For questions, ask [Stack Overflow](http://stackoverflow.com/questions/tagged/gr
 
 ## Getting Started
 
-An overview of the GraphQL language is available in the 
+An overview of the GraphQL language is available in the
 [README](https://github.com/facebook/graphql/blob/master/README.md) for the
-[Specification for GraphQL](https://github.com/facebook/graphql). 
+[Specification for GraphQL](https://github.com/facebook/graphql).
 
 The overview describes a simple set of GraphQL examples that exist as [tests](https://github.com/graphql-python/graphql-core/tree/master/tests/)
 in this repository. A good way to get started is to walk through that README and the corresponding tests
-in parallel. 
+in parallel.
 
 ### Using graphql-core
 

graphql/error/tests/test_base.py

@@ -39,7 +39,7 @@ def resolver(context, *_):
     formatted_tb = [row[2:] for row in extracted]
     if formatted_tb[2][0] == 'reraise':
         formatted_tb[2:] = formatted_tb[3:]
-    
+
     assert formatted_tb == [
         ('test_reraise', 'result.errors[0].reraise()'),
         ('reraise', 'six.reraise(type(self), self, self.stack)'),

graphql/execution/executor.py

@@ -233,7 +233,7 @@ def resolve_field(exe_context, parent_type, source, field_asts, parent_info):
         operation=exe_context.operation,
         variable_values=exe_context.variable_values,
         context=context,
-        path=parent_info.path+[field_name] if parent_info else [field_name]
+        path=parent_info.path + [field_name] if parent_info else [field_name]
     )
 
     executor = exe_context.executor

graphql/execution/tests/test_abstract.py

@@ -25,7 +25,7 @@ def __init__(self, name):
         self.name = name
 
 
-is_type_of = lambda type: lambda obj, info: isinstance(obj, type)
+def is_type_of(type): return lambda obj, info: isinstance(obj, type)
 
 
 def make_type_resolver(types):

graphql/execution/tests/test_dataloader.py

@@ -28,7 +28,6 @@ def test_batches_correctly(executor):
 
     schema = GraphQLSchema(query=Query)
 
-
     doc = '''
 {
     business1: getBusiness(id: "1") {
@@ -41,9 +40,8 @@ def test_batches_correctly(executor):
     '''
     doc_ast = parse(doc)
 
-
     load_calls = []
-    
+
     class BusinessDataLoader(DataLoader):
         def batch_load_fn(self, keys):
             load_calls.append(keys)
@@ -52,7 +50,6 @@ def batch_load_fn(self, keys):
     class Context(object):
         business_data_loader = BusinessDataLoader()
 
-
     result = execute(schema, doc_ast, None, context_value=Context(), executor=executor)
     assert not result.errors
     assert result.data == {
@@ -63,7 +60,7 @@ class Context(object):
             'id': '2'
         },
     }
-    assert load_calls == [['1','2']]
+    assert load_calls == [['1', '2']]
 
 
 @pytest.mark.parametrize("executor", [
@@ -78,8 +75,11 @@ def test_batches_multiple_together(executor):
 
     Business = GraphQLObjectType('Business', lambda: {
         'id': GraphQLField(GraphQLID, resolver=lambda root, info, **args: root),
-        'location': GraphQLField(Location,
-            resolver=lambda root, info, **args: info.context.location_data_loader.load('location-{}'.format(root))
+        'location': GraphQLField(
+            Location,
+            resolver=lambda root, info, **args: info.context.location_data_loader.load(
+                'location-{}'.format(root)
+            )
         ),
     })
 
@@ -94,7 +94,6 @@ def test_batches_multiple_together(executor):
 
     schema = GraphQLSchema(query=Query)
 
-
     doc = '''
 {
     business1: getBusiness(id: "1") {
@@ -113,16 +112,15 @@ def test_batches_multiple_together(executor):
     '''
     doc_ast = parse(doc)
 
-
     business_load_calls = []
-    
+
     class BusinessDataLoader(DataLoader):
         def batch_load_fn(self, keys):
             business_load_calls.append(keys)
             return Promise.resolve(keys)
 
     location_load_calls = []
-    
+
     class LocationDataLoader(DataLoader):
         def batch_load_fn(self, keys):
             location_load_calls.append(keys)
@@ -132,7 +130,6 @@ class Context(object):
         business_data_loader = BusinessDataLoader()
         location_data_loader = LocationDataLoader()
 
-
     result = execute(schema, doc_ast, None, context_value=Context(), executor=executor)
     assert not result.errors
     assert result.data == {
@@ -149,5 +146,5 @@ class Context(object):
             }
         },
     }
-    assert business_load_calls == [['1','2']]
-    assert location_load_calls == [['location-1','location-2']]
+    assert business_load_calls == [['1', '2']]
+    assert location_load_calls == [['location-1', 'location-2']]

graphql/execution/tests/test_executor.py

@@ -812,4 +812,3 @@ def resolve(self, _next, root, info, *args, **kwargs):
         ['feed', 1, 'author', 'id'],
         ['feed', 1, 'author', 'name']
     ]
-

graphql/execution/tests/test_located_error.py

@@ -20,4 +20,4 @@ def resolver(context, *_):
     })
 
     result = execute(GraphQLSchema(Type), ast)
-    assert isinstance(result.errors[0], GraphQLLocatedError)
+    assert isinstance(result.errors[0], GraphQLLocatedError)

graphql/execution/tests/test_resolve.py

@@ -8,6 +8,7 @@
                           GraphQLObjectType, GraphQLSchema, GraphQLString)
 from promise import Promise
 
+
 class CustomPromise(Promise):
     @classmethod
     def fulfilled(cls, x):
@@ -150,7 +151,6 @@ def test_maps_argument_out_names_well_with_input():
     def resolver(source, info, **args):
         return json.dumps([source, args], separators=(',', ':'))
 
-
     TestInputObject = GraphQLInputObjectType('TestInputObject', lambda: OrderedDict([
         ('inputOne', GraphQLInputObjectField(GraphQLString, out_name="input_one")),
         ('inputRecursive', GraphQLInputObjectField(TestInputObject, out_name="input_recursive")),

graphql/execution/tests/test_variables.py

@@ -35,7 +35,8 @@ class my_special_dict(dict):
     ('a', GraphQLInputObjectField(GraphQLString)),
 ]), container_type=my_special_dict)
 
-stringify = lambda obj: json.dumps(obj, sort_keys=True)
+
+def stringify(obj): return json.dumps(obj, sort_keys=True)
 
 
 def input_to_json(obj, info, **args):

graphql/language/printer.py

@@ -116,7 +116,7 @@ def leave_SchemaDefinition(self, node, *args):
             'schema',
             join(node.directives, ' '),
             block(node.operation_types),
-            ], ' ')
+        ], ' ')
 
     def leave_OperationTypeDefinition(self, node, *args):
         return '{}: {}'.format(node.operation, node.type)

graphql/type/definition.py

@@ -161,6 +161,7 @@ class GraphQLObjectType(GraphQLType):
             'bestFriend': GraphQLField(PersonType)
         })
     """
+
     def __init__(self, name, fields, interfaces=None, is_type_of=None, description=None):
         assert name, 'Type must be named.'
         assert_valid_name(name)
@@ -513,6 +514,7 @@ class GeoPoint(GraphQLInputObjectType):
                     default_value=0)
             }
     """
+
     def __init__(self, name, fields, description=None, container_type=None):
         assert name, 'Type must be named.'
         self.name = name

graphql/type/tests/test_schema.py

@@ -9,7 +9,7 @@
         'field_name': GraphQLField(
             type=GraphQLString,
             resolver=lambda *_: implementing_type
-            )
+        )
     }
 )
 
@@ -31,6 +31,7 @@
     )
 )
 
+
 def test_throws_human_readable_error_if_schematypes_not_defined():
     with raises(AssertionError) as exci:
         schema.is_possible_type(interface_type, implementing_type)

graphql/type/typemap.py

@@ -41,7 +41,7 @@ def is_possible_type(self, abstract_type, possible_type):
             'Could not find possible implementing types for ${} in ' +
             'schema. Check that schema.types is defined and is an array of' +
             'all possible types in the schema.'
-            ).format(abstract_type)
+        ).format(abstract_type)
 
         if not self._possible_type_map[abstract_type.name]:
             self._possible_type_map[abstract_type.name].update([p.name for p in possible_types])

graphql/utils/tests/test_ast_to_code.py

@@ -10,7 +10,8 @@ def test_ast_to_code_using_kitchen_sink():
     doc = parse(fixtures.KITCHEN_SINK)
     code_ast = ast_to_code(doc)
     source = Source(fixtures.KITCHEN_SINK)
-    loc = lambda start, end: Loc(start, end, source)
+
+    def loc(start, end): return Loc(start, end, source)
 
     parsed_code_ast = eval(code_ast, {}, {'ast': ast, 'loc': loc})
     assert doc == parsed_code_ast

graphql/utils/tests/test_build_client_schema.py

@@ -619,7 +619,7 @@ def test_succeds_on_smaller_equals_than_7_deep_lists():
                         GraphQLNonNull(GraphQLList(GraphQLNonNull(
                             GraphQLList(GraphQLNonNull(GraphQLString))
                         ))
-                    )))
+                        )))
                 )
             }
         )

graphql/utils/tests/test_quoted_or_list.py

@@ -7,14 +7,18 @@ def test_does_not_accept_an_empty_list():
     with raises(StopIteration):
         quoted_or_list([])
 
+
 def test_returns_single_quoted_item():
     assert quoted_or_list(['A']) == '"A"'
 
+
 def test_returns_two_item_list():
     assert quoted_or_list(['A', 'B']) == '"A" or "B"'
 
+
 def test_returns_comma_separated_many_item_list():
     assert quoted_or_list(['A', 'B', 'C']) == '"A", "B" or "C"'
 
+
 def test_limits_to_five_items():
     assert quoted_or_list(['A', 'B', 'C', 'D', 'E', 'F']) == '"A", "B", "C", "D" or "E"'

graphql/validation/rules/overlapping_fields_can_be_merged.py

@@ -161,7 +161,7 @@ def _find_conflicts_within_selection_set(context, cached_fields_and_fragment_nam
         # selection set to collect conflicts within fragments spread together.
         # This compares each item in the list of fragment names to every other item
         # in that same list (except for itself).
-        for other_fragment_name in fragment_names[i+1:]:
+        for other_fragment_name in fragment_names[i + 1:]:
             _collect_conflicts_between_fragments(
                 context,
                 conflicts,
@@ -304,7 +304,7 @@ def _collect_conflicts_within(context, conflicts, cached_fields_and_fragment_nam
         # (except to itself). If the list only has one item, nothing needs to
         # be compared.
         for i, field in enumerate(fields):
-            for other_field in fields[i+1:]:
+            for other_field in fields[i + 1:]:
                 # within one collection is never mutually exclusive
                 conflict = _find_conflict(context, cached_fields_and_fragment_names, compared_fragments, False,
                                           response_name, field, other_field)

scripts/casing.py

@@ -5,6 +5,7 @@
 # LICENSE file in the root directory of this source tree. An additional grant
 # of patent rights can be found in the PATENTS file in the same directory.
 
+
 def title(s):
     '''Capitalize the first character of s.'''
     return s[0].capitalize() + s[1:]

scripts/generate_ast.py

@@ -20,6 +20,7 @@
     'ArrayValue': 'ListValue',
 }
 
+
 def remap_type(typename):
     return REMAP_TYPES.get(typename, typename)
 
@@ -101,7 +102,7 @@ def _print_copy(self, typename):
             [field for field in self._fields if not field[2]] +
             [field for field in self._fields if field[2]])
         args = '\n'.join('''            self.{},'''.format(snake(name)) for (type, name, nullable, plural) in fields)
-        print ('''
+        print('''
     def __copy__(self):
         return type(self)(
 {}
@@ -139,4 +140,3 @@ def union_option(self, option):
 
     def end_union(self, name):
         self._current_union = None
-

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = flake8,isort,py27,py33,py34,py35,pypy,docs
+envlist = flake8,isort,py27,py33,py34,py35,pre-commit,pypy,docs
 
 [testenv]
 deps =
@@ -13,6 +13,14 @@ commands =
     py{27,33,34,py}: py.test graphql tests {posargs}
     py35: py.test graphql tests tests_py35 {posargs}
 
+[testenv:pre-commit]
+basepython=python3.6
+deps =
+    pre-commit>0.12.0
+setenv =
+    LC_CTYPE=en_US.UTF-8
+commands =
+    pre-commit {posargs:run --all-files}
 
 [testenv:flake8]
 deps = flake8