Do something / nothing when max retries run out.

[ubehera]

I'm doing a broad except to catch everything and then not raising it. To make retrying work, I had to catch and raise the IOError specifically. But if the max retries run out, I don't wan't it to raise and fail. Is there a way to do this?

[PegasusWang]

Can we add a default return value when reach max retries ?
add a default_return_value to Retrying constructor, if default_return_value is not None and reach max retry times just return this default value and do nothing.

or

def f():
    @retry(retry_on_result=retry_if_result_none, stop_max_attempt_number=7,
        after_attempts=after_attempts, wrap_exception=True)
    def might_return_none():
        print "Retry forever ignoring Exceptions with no wait if return value is None"
        return None
        # return 1
    try:
        might_return_none()
    except RetryError as e:
        print(e)

then just call f() instead of might_reutrn_none()

[gulducat]

Hey there @ubehera and @PegasusWang -- I had need of a similar thing and ended up writing #78

If you're still around and have thoughts, it'd be pretty nifty if you wanted to chime in on that PR.

[gulducat]

Just in case someone stumbles across this (like I did), I made a change to tenacity (after seeing #65) that covers this.

from tenacity import retry, stop_after_attempt

Do nothing (return None):

def do_nothing(eh):
    return

@retry(stop=stop_after_attempt(3), retry_error_callback=do_nothing)
def is_ok_to_fail():
    raise Exception('aw dang')

or, to return a default value (using lambda here because why not)

@retry(stop=stop_after_attempt(3), retry_error_callback=lambda _: True)
def return_true_on_exception():
    raise Exception('aw shucks')