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"""Helper functinos for working with signals"""
from scrapy.xlib.pydispatch import dispatcher
from scrapy.xlib.pydispatch.robust import sendRobust
from scrapy import log
def send_catch_log(*args, **kwargs):
"""Same as dispatcher.robust.sendRobust but logs any exceptions raised by
the signal handlers
"""
results = sendRobust(*args, **kwargs)
for receiver, response in results:
if isinstance(response, Exception):
log.msg("Exception caught on signal dispatch: receiver=%r, " \
" exception=%r" % (receiver, response), level=log.ERROR)
return results
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