blob: e5eb9caa60f7ac893732f79fa9c1fbf1c13961c0 [file] [log] [blame]
import time
from functools import wraps
def retry(ExceptionToCheck, tries=4, delay=3, backoff=2, logger=None):
"""Retry calling the decorated function using an exponential backoff.
original from:
:param ExceptionToCheck: the exception to check. may be a tuple of
exceptions to check
:type ExceptionToCheck: Exception or tuple
:param tries: number of times to try (not retry) before giving up
:type tries: int
:param delay: initial delay between retries in seconds
:type delay: int
:param backoff: backoff multiplier e.g. value of 2 will double the delay
each retry
:type backoff: int
:param logger: logger to use. If None, print
:type logger: logging.Logger instance
def deco_retry(f):
def f_retry(*args, **kwargs):
mtries, mdelay = tries, delay
while mtries > 1:
return f(*args, **kwargs)
except ExceptionToCheck, e:
msg = "%s, Retrying in %d seconds..." % (str(e), mdelay)
if logger:
print msg
mtries -= 1
mdelay *= backoff
return f(*args, **kwargs)
return f_retry # true decorator
return deco_retry