asyncio, Tulip issue #136: Add get/set_debug() methods to BaseEventLoopTests.
Add also a PYTHONASYNCIODEBUG environment variable to debug coroutines since
Python startup, to be able to debug coroutines defined directly in the asyncio
module.
diff --git a/Lib/asyncio/base_events.py b/Lib/asyncio/base_events.py
index b94ba07..69caa4d 100644
--- a/Lib/asyncio/base_events.py
+++ b/Lib/asyncio/base_events.py
@@ -123,6 +123,7 @@
self._running = False
self._clock_resolution = time.get_clock_info('monotonic').resolution
self._exception_handler = None
+ self._debug = False
def _make_socket_transport(self, sock, protocol, waiter=None, *,
extra=None, server=None):
@@ -795,3 +796,9 @@
if not handle._cancelled:
handle._run()
handle = None # Needed to break cycles when an exception occurs.
+
+ def get_debug(self):
+ return self._debug
+
+ def set_debug(self, enabled):
+ self._debug = enabled
diff --git a/Lib/asyncio/events.py b/Lib/asyncio/events.py
index 1030c04..5362f05 100644
--- a/Lib/asyncio/events.py
+++ b/Lib/asyncio/events.py
@@ -345,6 +345,14 @@
def call_exception_handler(self, context):
raise NotImplementedError
+ # Debug flag management.
+
+ def get_debug(self):
+ raise NotImplementedError
+
+ def set_debug(self, enabled):
+ raise NotImplementedError
+
class AbstractEventLoopPolicy:
"""Abstract policy for accessing the event loop."""
diff --git a/Lib/asyncio/tasks.py b/Lib/asyncio/tasks.py
index a3e7cdf..cf7b540 100644
--- a/Lib/asyncio/tasks.py
+++ b/Lib/asyncio/tasks.py
@@ -12,6 +12,8 @@
import functools
import inspect
import linecache
+import os
+import sys
import traceback
import weakref
@@ -28,7 +30,8 @@
# before you define your coroutines. A downside of using this feature
# is that tracebacks show entries for the CoroWrapper.__next__ method
# when _DEBUG is true.
-_DEBUG = False
+_DEBUG = (not sys.flags.ignore_environment
+ and bool(os.environ.get('PYTHONASYNCIODEBUG')))
class CoroWrapper: