Convert namedtuples to class syntax (#3321)

third_party/2/tornado/gen.pyi

@@ -1,5 +1,4 @@
-from typing import Any
-from collections import namedtuple
+from typing import Any, Dict, NamedTuple, Tuple
 
 singledispatch: Any
 
@@ -104,6 +103,8 @@ class Runner:
     def result_callback(self, key): ...
     def handle_exception(self, typ, value, tb): ...
 
-Arguments = namedtuple('Arguments', ['args', 'kwargs'])
+class Arguments(NamedTuple):
+    args: Tuple[str, ...]
+    kwargs: Dict[str, Any]
 
 def convert_yielded(yielded): ...

third_party/2/tornado/httputil.pyi

@@ -1,6 +1,6 @@
-from typing import Any, Dict
+from typing import Any, Dict, NamedTuple
+
 from tornado.util import ObjectDict
-from collections import namedtuple
 
 class SSLError(Exception): ...
 
@@ -79,11 +79,17 @@ def parse_body_arguments(content_type, body, arguments, files, headers=...): ...
 def parse_multipart_form_data(boundary, data, arguments, files): ...
 def format_timestamp(ts): ...
 
-RequestStartLine = namedtuple('RequestStartLine', ['method', 'path', 'version'])
+class RequestStartLine(NamedTuple):
+    method: str
+    path: str
+    version: str
 
 def parse_request_start_line(line): ...
 
-ResponseStartLine = namedtuple('ResponseStartLine', ['version', 'code', 'reason'])
+class ResponseStartLine(NamedTuple):
+    version: str
+    code: str
+    reason: str
 
 def parse_response_start_line(line): ...
 def doctests(): ...

third_party/2and3/decorator.pyi

@@ -11,14 +11,14 @@ if sys.version_info >= (3,):
     from inspect import iscoroutinefunction as iscoroutinefunction
     from inspect import getfullargspec as getfullargspec
 else:
-    FullArgSpec = NamedTuple('FullArgSpec', [('args', List[str]),
-                                             ('varargs', Optional[str]),
-                                             ('varkw', Optional[str]),
-                                             ('defaults', Tuple[Any, ...]),
-                                             ('kwonlyargs', List[str]),
-                                             ('kwonlydefaults', Dict[str, Any]),
-                                             ('annotations', Dict[str, Any]),
-                                             ])
+    class FullArgSpec(NamedTuple):
+        args: List[str]
+        varargs: Optional[str]
+        varkw: Optional[str]
+        defaults: Tuple[Any, ...]
+        kwonlyargs: List[str]
+        kwonlydefaults: Dict[str, Any]
+        annotations: Dict[str, Any]
     def iscoroutinefunction(f: Callable[..., Any]) -> bool: ...
     def getfullargspec(func: Any) -> FullArgSpec: ...
 

third_party/2and3/jinja2/filters.pyi

@@ -37,7 +37,9 @@ def do_batch(value, linecount, fill_with: Optional[Any] = ...): ...
 def do_round(value, precision: int = ..., method: str = ...): ...
 def do_groupby(environment, value, attribute): ...
 
-_GroupTuple = NamedTuple("_GroupTuple", [("grouper", Any), ("list", Any)])
+class _GroupTuple(NamedTuple):
+    grouper: Any
+    list: Any
 
 def do_sum(environment, iterable, attribute: Optional[Any] = ..., start: int = ...): ...
 def do_list(value): ...

third_party/2and3/werkzeug/urls.pyi

@@ -1,12 +1,11 @@
-from collections import namedtuple
-from typing import Any, Optional, Text
-
-
-_URLTuple = namedtuple(
-    '_URLTuple',
-    ['scheme', 'netloc', 'path', 'query', 'fragment']
-)
+from typing import Any, NamedTuple, Optional, Text
 
+class _URLTuple(NamedTuple):
+    scheme: Any
+    netloc: Any
+    path: Any
+    query: Any
+    fragment: Any
 
 class BaseURL(_URLTuple):
     def replace(self, **kwargs): ...