Add typestubs for the warnings module (#3543)

stdlib/2and3/_warnings.pyi

@@ -7,28 +7,58 @@ if sys.version_info >= (3, 0):
 else:
     default_action: str
     once_registry: Dict[Any, Any]
+
 filters: List[Tuple[Any, ...]]
-@overload
-def warn(message: str, category: Optional[Type[Warning]] = ..., stacklevel: int = ...) -> None: ...
-@overload
-def warn(message: Warning, category: Any = ..., stacklevel: int = ...) -> None: ...
-@overload
-def warn_explicit(
-    message: str,
-    category: Type[Warning],
-    filename: str,
-    lineno: int,
-    module: Optional[str] = ...,
-    registry: Optional[Dict[Union[str, Tuple[str, Type[Warning], int]], int]] = ...,
-    module_globals: Optional[Dict[str, Any]] = ...,
-) -> None: ...
-@overload
-def warn_explicit(
-    message: Warning,
-    category: Any,
-    filename: str,
-    lineno: int,
-    module: Optional[str] = ...,
-    registry: Optional[Dict[Union[str, Tuple[str, Type[Warning], int]], int]] = ...,
-    module_globals: Optional[Dict[str, Any]] = ...,
-) -> None: ...
+
+if sys.version_info >= (3, 6):
+    @overload
+    def warn(message: str, category: Optional[Type[Warning]] = ..., stacklevel: int = ..., source: Optional[Any] = ...) -> None: ...
+    @overload
+    def warn(message: Warning, category: Any = ..., stacklevel: int = ..., source: Optional[Any] = ...) -> None: ...
+    @overload
+    def warn_explicit(
+        message: str,
+        category: Type[Warning],
+        filename: str,
+        lineno: int,
+        module: Optional[str] = ...,
+        registry: Optional[Dict[Union[str, Tuple[str, Type[Warning], int]], int]] = ...,
+        module_globals: Optional[Dict[str, Any]] = ...,
+        source: Optional[Any] = ...,
+    ) -> None: ...
+    @overload
+    def warn_explicit(
+        message: Warning,
+        category: Any,
+        filename: str,
+        lineno: int,
+        module: Optional[str] = ...,
+        registry: Optional[Dict[Union[str, Tuple[str, Type[Warning], int]], int]] = ...,
+        module_globals: Optional[Dict[str, Any]] = ...,
+        source: Optional[Any] = ...,
+    ) -> None: ...
+else:
+    @overload
+    def warn(message: str, category: Optional[Type[Warning]] = ..., stacklevel: int = ...) -> None: ...
+    @overload
+    def warn(message: Warning, category: Any = ..., stacklevel: int = ...) -> None: ...
+    @overload
+    def warn_explicit(
+        message: str,
+        category: Type[Warning],
+        filename: str,
+        lineno: int,
+        module: Optional[str] = ...,
+        registry: Optional[Dict[Union[str, Tuple[str, Type[Warning], int]], int]] = ...,
+        module_globals: Optional[Dict[str, Any]] = ...,
+    ) -> None: ...
+    @overload
+    def warn_explicit(
+        message: Warning,
+        category: Any,
+        filename: str,
+        lineno: int,
+        module: Optional[str] = ...,
+        registry: Optional[Dict[Union[str, Tuple[str, Type[Warning], int]], int]] = ...,
+        module_globals: Optional[Dict[str, Any]] = ...,
+    ) -> None: ...

stdlib/2and3/warnings.pyi

@@ -1,4 +1,5 @@
-from typing import List, NamedTuple, Optional, overload, TextIO, Type
+import sys
+from typing import Any, List, NamedTuple, Optional, overload, TextIO, Type
 from types import ModuleType, TracebackType
 from typing_extensions import Literal
 
@@ -14,13 +15,20 @@ def filterwarnings(
 def simplefilter(action: str, category: Type[Warning] = ..., lineno: int = ..., append: bool = ...) -> None: ...
 def resetwarnings() -> None: ...
 
-class _Record(NamedTuple):
-    message: str
+class _OptionError(Exception): ...
+
+class WarningMessage:
+    message: Warning
     category: Type[Warning]
-    filename: str
-    lineno: int
-    file: Optional[TextIO]
-    line: Optional[str]
+    filename: Any
+    lineno: Any
+    file: Optional[Any]
+    line: Optional[Any]
+    if sys.version_info >= (3, 6):
+        source: Optional[Any]
+        def __init__(self, message: Warning, category: Type[Warning], filename: Any, lineno: Any, file: Optional[Any] = ..., line: Optional[Any] = ..., source: Optional[Any] = ...) -> None: ...
+    else:
+        def __init__(self, message: Warning, category: Type[Warning], filename: Any, lineno: Any, file: Optional[Any] = ..., line: Optional[Any] = ...) -> None: ...
 
 class catch_warnings:
     @overload
@@ -29,7 +37,7 @@ class catch_warnings:
     def __new__(cls, *, record: Literal[True], module: Optional[ModuleType] = ...) -> _catch_warnings_with_records: ...
     @overload
     def __new__(cls, *, record: bool, module: Optional[ModuleType] = ...) -> catch_warnings: ...
-    def __enter__(self) -> Optional[List[_Record]]: ...
+    def __enter__(self) -> Optional[List[WarningMessage]]: ...
     def __exit__(
         self, exc_type: Optional[Type[BaseException]], exc_val: Optional[BaseException], exc_tb: Optional[TracebackType]
     ) -> None: ...
@@ -38,4 +46,4 @@ class _catch_warnings_without_records(catch_warnings):
     def __enter__(self) -> None: ...
 
 class _catch_warnings_with_records(catch_warnings):
-    def __enter__(self) -> List[_Record]: ...
+    def __enter__(self) -> List[WarningMessage]: ...

stdlib/3/unittest/case.pyi

@@ -2,6 +2,7 @@ import datetime
 import logging
 import sys
 import unittest.result
+import warnings
 from types import TracebackType
 from typing import (
     Any, AnyStr, Callable, Container, ContextManager, Dict, FrozenSet, Generic,
@@ -233,9 +234,10 @@ class _AssertRaisesContext(Generic[_E]):
                  exc_tb: Optional[TracebackType]) -> bool: ...
 
 class _AssertWarnsContext:
-    warning: Warning
+    warning: warnings.WarningMessage
     filename: str
     lineno: int
+    warnings: List[warnings.WarningMessage]
     def __enter__(self) -> _AssertWarnsContext: ...
     def __exit__(self, exc_type: Optional[Type[BaseException]], exc_val: Optional[BaseException],
                  exc_tb: Optional[TracebackType]) -> None: ...