/usr/lib/python2.7/dist-packages/gevent/util.py is in python-gevent 1.0-1ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | # Copyright (c) 2009 Denis Bilenko. See LICENSE for details.
__all__ = ['wrap_errors']
import sys
class wrap_errors(object):
"""Helper to make function return an exception, rather than raise it.
Because every exception that is unhandled by greenlet will be logged,
it is desirable to prevent non-error exceptions from leaving a greenlet.
This can done with simple ``try``/``except`` construct::
def wrapped_func(*args, **kwargs):
try:
return func(*args, **kwargs)
except (A, B, C), ex:
return ex
:class:`wrap_errors` provides a shortcut to write that in one line::
wrapped_func = wrap_errors((A, B, C), func)
It also preserves ``__str__`` and ``__repr__`` of the original function.
"""
# QQQ could also support using wrap_errors as a decorator
def __init__(self, errors, func):
"""Make a new function from `func', such that it catches `errors' (an
Exception subclass, or a tuple of Exception subclasses) and return
it as a value.
"""
self.errors = errors
self.func = func
def __call__(self, *args, **kwargs):
func = self.func
try:
return func(*args, **kwargs)
except self.errors:
return sys.exc_info()[1]
def __str__(self):
return str(self.func)
def __repr__(self):
return repr(self.func)
def __getattr__(self, item):
return getattr(self.func, item)
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