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show traceback in widget handlers

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rather than logging

closes #5064
This commit is contained in:
MinRK 2014-02-07 16:43:49 -08:00
parent 4f53aa2985
commit ddc22152ea
1 changed files with 19 additions and 1 deletions
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20
IPython/html/widgets/widget.py
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@ -14,6 +14,7 @@ in the IPython notebook front-end.
#-----------------------------------------------------------------------------
from contextlib import contextmanager
from IPython.core.getipython import get_ipython
from IPython.kernel.comm import Comm
from IPython.config import LoggingConfigurable
from IPython.utils.traitlets import Unicode, Dict, Instance, Bool, List, Tuple
@ -33,7 +34,11 @@ class CallbackDispatcher(LoggingConfigurable):
try:
local_value = callback(*args, **kwargs)
except Exception as e:
self.log.warn("Exception in callback %s: %s", callback, e)
ip = get_ipython()
if ip is None:
self.log.warn("Exception in callback %s: %s", callback, e, exc_info=True)
else:
ip.showtraceback()
else:
value = local_value if local_value is not None else value
return value
@ -54,6 +59,18 @@ class CallbackDispatcher(LoggingConfigurable):
elif not remove and callback not in self.callbacks:
self.callbacks.append(callback)
def _show_traceback(method):
"""decorator for showing tracebacks in IPython"""
def m(self, *args, **kwargs):
try:
return(method(self, *args, **kwargs))
except Exception as e:
ip = get_ipython()
if ip is None:
self.log.warn("Exception in widget method %s: %s", method, e, exc_info=True)
else:
ip.showtraceback()
return m
class Widget(LoggingConfigurable):
#-------------------------------------------------------------------------
@ -241,6 +258,7 @@ class Widget(LoggingConfigurable):
value != self._property_lock[1]
# Event handlers
@_show_traceback
def _handle_msg(self, msg):
"""Called when a msg is received from the front-end"""
data = msg['content']['data']