Remove 'dummy_contextvars'. No longer needed after dropping Python 3.6.

Author: jonathanslenders

src/prompt_toolkit/application/application.py

@@ -1,4 +1,5 @@
 import asyncio
+import contextvars
 import os
 import re
 import signal
@@ -92,12 +93,6 @@
 from .current import get_app_session, set_app
 from .run_in_terminal import in_terminal, run_in_terminal
 
-try:
-    import contextvars
-except ImportError:
-    import prompt_toolkit.eventloop.dummy_contextvars as contextvars  # type: ignore
-
-
 __all__ = [
     "Application",
 ]

src/prompt_toolkit/application/current.py

@@ -1,12 +1,8 @@
 import sys
 from contextlib import contextmanager
+from contextvars import ContextVar
 from typing import TYPE_CHECKING, Any, Generator, Optional
 
-try:
-    from contextvars import ContextVar
-except ImportError:
-    from prompt_toolkit.eventloop.dummy_contextvars import ContextVar  # type: ignore
-
 if TYPE_CHECKING:
     from prompt_toolkit.input.base import Input
     from prompt_toolkit.output.base import Output

src/prompt_toolkit/eventloop/dummy_contextvars.py

@@ -1,15 +1,11 @@
 import asyncio
+import contextvars
 import sys
 import time
 from asyncio import get_running_loop
 from types import TracebackType
 from typing import Any, Awaitable, Callable, Dict, Optional, TypeVar, cast
 
-try:
-    import contextvars
-except ImportError:
-    from . import dummy_contextvars as contextvars  # type: ignore
-
 __all__ = [
     "run_in_executor_with_context",
     "call_soon_threadsafe",

src/prompt_toolkit/eventloop/utils.py

@@ -7,6 +7,7 @@
         for item in pb(data):
             ...
 """
+import contextvars
 import datetime
 import functools
 import os
@@ -55,14 +56,6 @@
 
 from .formatters import Formatter, create_default_formatters
 
-try:
-    import contextvars
-except ImportError:
-    from prompt_toolkit.eventloop import dummy_contextvars
-
-    contextvars = dummy_contextvars  # type: ignore
-
-
 __all__ = ["ProgressBar"]
 
 E = KeyPressEvent