| __init__.py |
A generator function that sleeps between retries, handles exponential
backoff and jitter. The action you are retrying is meant to run after
retrier yields.
At each iteration, we sleep for sleeptime + random.uniform(-jitter, jitter).
Afterwards sleeptime is multiplied by sleepscale for the next iteration.
Args:
attempts (int): maximum number of times to try; defaults to 5
sleeptime (float): how many seconds to sleep between tries; defaults to
10 seconds
max_sleeptime (float): the longest we'll sleep, in seconds; defaults to
300s (five minutes)
sleepscale (float): how much to multiply the sleep time by each
iteration; defaults to 1.5
jitter (float): random jitter to introduce to sleep time each iteration.
the amount is chosen at random between [-jitter, +jitter]
defaults to 1
Yields:
None, a maximum of `attempts` number of times
Example:
>>> n = 0
>>> for _ in retrier(sleeptime=0, jitter=0):
... if n == 3:
... # We did the thing!
... break
... n += 1
>>> n
3
>>> n = 0
>>> for _ in retrier(sleeptime=0, jitter=0):
... if n == 6:
... # We did the thing!
... break
... n += 1
... else:
... print("max tries hit")
max tries hit
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