Can't use decorators without "@" syntax

[martinvol]

>>> backoff.on_exception(print, backoff.expo, Exception, max_tries=8)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: on_exception() got multiple values for argument 'max_tries'

[bgreen-litl]

I'm not sure if you mean this as a feature request, but the above fails because you are passing on_exception an extra argument. Take print out and the above will work.

You can actually use them without the decorator syntax if you want:

>>> retry = backoff.on_exception(backoff.expo, Exception, max_tries=8)
>>> retry(print)
<function print>
>>> retry(print)("foo")
foo

[martinvol]

Sorry I messed up with the syntax.