fix code style to mypy guidelines

mypy/nodes.py

@@ -137,13 +137,15 @@ def get_column(self) -> int:
 } # type: Final
 
 _nongen_builtins = {'builtins.tuple': 'typing.Tuple',
- 'builtins.enumerate': ''} # type: Final
+  'builtins.enumerate': ''} # type: Final
 _nongen_builtins.update((name, alias) for alias, name in type_aliases.items())
 
-def get_nongen_builtins(python_version):
+
+def get_nongen_builtins(python_version: Tuple[int, int]) -> Dict[str, str]:
  # After 3.9 with pep585 generic builtins are allowed.
  return _nongen_builtins if python_version < (3, 9) else {}
 
+
 RUNTIME_PROTOCOL_DECOS = ('typing.runtime_checkable',
  'typing_extensions.runtime',
  'typing_extensions.runtime_checkable') # type: Final

mypy/typeanal.py

@@ -345,7 +345,8 @@ def try_analyze_special_unbound_type(self, t: UnboundType, fullname: str) -> Opt
 
  def get_omitted_any(self, typ: Type, fullname: Optional[str] = None) -> AnyType:
  disallow_any = not self.is_typeshed_stub and self.options.disallow_any_generics
- return get_omitted_any(disallow_any, self.fail, self.note, typ, self.options.python_version, fullname)
+ return get_omitted_any(disallow_any, self.fail, self.note, typ,
+ self.options.python_version, fullname)
 
  def analyze_type_with_type_info(
  self, info: TypeInfo, args: Sequence[Type], ctx: Context) -> Type:
@@ -1028,7 +1029,8 @@ def fix_instance(t: Instance, fail: MsgCallback, note: MsgCallback,
  fullname = None # type: Optional[str]
  else:
  fullname = t.type.fullname
- any_type = get_omitted_any(disallow_any, fail, note, t, python_version, fullname, unexpanded_type)
+ any_type = get_omitted_any(disallow_any, fail, note, t, python_version, fullname,
+ unexpanded_type)
  t.args = (any_type,) * len(t.type.type_vars)
  return
  # Invalid number of type parameters.
@@ -1287,7 +1289,8 @@ def make_optional_type(t: Type) -> Type:
  return UnionType([t, NoneType()], t.line, t.column)
 
 
-def fix_instance_types(t: Type, fail: MsgCallback, note: MsgCallback, python_version: Tuple[int, int]) -> None:
+def fix_instance_types(t: Type, fail: MsgCallback, note: MsgCallback,
+ python_version: Tuple[int, int]) -> None:
  """Recursively fix all instance types (type argument count) in a given type.
 
  For example 'Union[Dict, List[str, int]]' will be transformed into
@@ -1297,12 +1300,15 @@ def fix_instance_types(t: Type, fail: MsgCallback, note: MsgCallback, python_ver
 
 
 class InstanceFixer(TypeTraverserVisitor):
- def __init__(self, fail: MsgCallback, note: MsgCallback, python_version: Tuple[int, int]) -> None:
+ def __init__(
+ self, fail: MsgCallback, note: MsgCallback, python_version: Tuple[int, int]
+ ) -> None:
  self.fail = fail
  self.note = note
  self.python_version = python_version
 
  def visit_instance(self, typ: Instance) -> None:
  super().visit_instance(typ)
  if len(typ.args) != len(typ.type.type_vars):
- fix_instance(typ, self.fail, self.note, disallow_any=False, python_version=self.python_version, use_generic_error=True)
+ fix_instance(typ, self.fail, self.note, disallow_any=False,
+ python_version=self.python_version, use_generic_error=True)