Skip _pb2.pyi from flake8,black,isort,pytype

Author: nipunn1313

.flake8

@@ -22,5 +22,5 @@ per-file-ignores =
 
 # We are checking with Python 3 but many of the stubs are Python 2 stubs.
 builtins = StandardError,apply,basestring,buffer,cmp,coerce,execfile,file,intern,long,raw_input,reduce,reload,unichr,unicode,xrange
-exclude = .venv*,@*,.git
+exclude = .venv*,@*,.git,*_pb2.pyi
 max-line-length = 130

pyproject.toml

@@ -1,11 +1,13 @@
 [tool.black]
 line_length = 130
 target_version = ["py37"]
+exclude = ".*_pb2.pyi"
 
 [tool.isort]
 profile = "black"
 combine_as_imports = true
 line_length = 130
+skip_glob = "*_pb2.pyi"
 extra_standard_library = [
     "typing_extensions",
     "_typeshed",

tests/pytype_exclude_list.txt

@@ -16,3 +16,31 @@ third_party/2and3/attr/converters.pyi
 third_party/2and3/attr/filters.pyi
 third_party/2and3/attr/validators.pyi
 third_party/2and3/pynamodb/models.pyi
+
+# _pb2.pyi have some constructs that break pytype
+# Eg
+# pytype.pyi.parser.ParseError:   File: "/Users/nipunn/src/typeshed/third_party/2and3/google/protobuf/descriptor_pb2.pyi", line 195
+# b"TypeValue = typing___NewType('TypeValue', builtin___int)"
+third_party/2and3/google/protobuf/any_pb2.pyi
+third_party/2and3/google/protobuf/api_pb2.pyi
+third_party/2and3/google/protobuf/compiler/plugin_pb2.pyi
+third_party/2and3/google/protobuf/descriptor.pyi
+third_party/2and3/google/protobuf/descriptor_pb2.pyi
+third_party/2and3/google/protobuf/duration_pb2.pyi
+third_party/2and3/google/protobuf/empty_pb2.pyi
+third_party/2and3/google/protobuf/field_mask_pb2.pyi
+third_party/2and3/google/protobuf/internal/containers.pyi
+third_party/2and3/google/protobuf/internal/enum_type_wrapper.pyi
+third_party/2and3/google/protobuf/internal/extension_dict.pyi
+third_party/2and3/google/protobuf/json_format.pyi
+third_party/2and3/google/protobuf/message.pyi
+third_party/2and3/google/protobuf/message_factory.pyi
+third_party/2and3/google/protobuf/service.pyi
+third_party/2and3/google/protobuf/source_context_pb2.pyi
+third_party/2and3/google/protobuf/struct_pb2.pyi
+third_party/2and3/google/protobuf/symbol_database.pyi
+third_party/2and3/google/protobuf/timestamp_pb2.pyi
+third_party/2and3/google/protobuf/type_pb2.pyi
+third_party/2and3/google/protobuf/util/json_format_pb2.pyi
+third_party/2and3/google/protobuf/util/json_format_proto3_pb2.pyi
+third_party/2and3/google/protobuf/wrappers_pb2.pyi