Added __traceback_hide__ to skip frames in tracebacks (#383)

Author: bigfootjon

asgiref/current_thread_executor.py

@@ -16,6 +16,7 @@ def __init__(self, future, fn, args, kwargs):
         self.kwargs = kwargs
 
     def run(self):
+        __traceback_hide__ = True  # noqa: F841
         if not self.future.set_running_or_notify_cancel():
             return
         try:

asgiref/sync.py

@@ -167,6 +167,8 @@ def __init__(self, awaitable, force_new_loop=False):
                     self.main_event_loop = None
 
     def __call__(self, *args, **kwargs):
+        __traceback_hide__ = True  # noqa: F841
+
         # You can't call AsyncToSync from a thread with a running event loop
         try:
             event_loop = asyncio.get_running_loop()
@@ -289,6 +291,9 @@ async def main_wrap(
         Wraps the awaitable with something that puts the result into the
         result/exception future.
         """
+
+        __traceback_hide__ = True  # noqa: F841
+
         if context is not None:
             _restore_context(context[0])
 
@@ -388,6 +393,7 @@ def __init__(
             pass
 
     async def __call__(self, *args, **kwargs):
+        __traceback_hide__ = True  # noqa: F841
         loop = asyncio.get_running_loop()
 
         # Work out what thread to run the code in
@@ -461,6 +467,9 @@ def thread_handler(self, loop, source_task, exc_info, func, *args, **kwargs):
         """
         Wraps the sync application with exception handling.
         """
+
+        __traceback_hide__ = True  # noqa: F841
+
         # Set the threadlocal for AsyncToSync
         self.threadlocal.main_event_loop = loop
         self.threadlocal.main_event_loop_pid = os.getpid()