gistfile1.txt

#!/usr/bin/env python                                                                                                                                                                                              

from __future__ import print_function, unicode_literals

from sys import argv
from datetime import datetime, timedelta

from twisted.internet.defer import inlineCallbacks
from twisted.internet.task import react

from txaws.service import AWSServiceRegion

@inlineCallbacks
def main(reactor, bucket, age):
    age = int(age)
    starting_time = datetime.utcnow() - timedelta(hours=age)
    marker = starting_time.strftime("/%Y%m%d%H_0.gz")
    region = AWSServiceRegion()
    s3 = region.get_s3_client()
    listing = yield s3.get_bucket(bucket, marker=marker)

    for item in listing.contents:
        obj = yield s3.get_object(bucket, item.key)
        print(obj)

if __name__ == '__main__':
    react(main, argv[1:])

gistfile2.txt

listed
main function encountered error
Traceback (most recent call last):
  File "/home/exarkun/Environments/leastauthority.com/local/lib/python2.7/site-packages/twisted/internet/defer.py", line 459, in callback
    self._startRunCallbacks(result)
  File "/home/exarkun/Environments/leastauthority.com/local/lib/python2.7/site-packages/twisted/internet/defer.py", line 567, in _startRunCallbacks
    self._runCallbacks()
  File "/home/exarkun/Environments/leastauthority.com/local/lib/python2.7/site-packages/twisted/internet/defer.py", line 653, in _runCallbacks
    current.result = callback(current.result, *args, **kw)
  File "/home/exarkun/Environments/leastauthority.com/local/lib/python2.7/site-packages/twisted/internet/defer.py", line 1442, in gotResult
    _inlineCallbacks(r, g, deferred)
--- <exception caught here> ---
  File "/home/exarkun/Environments/leastauthority.com/local/lib/python2.7/site-packages/twisted/internet/defer.py", line 1384, in _inlineCallbacks
    result = result.throwExceptionIntoGenerator(g)
  File "/home/exarkun/Environments/leastauthority.com/local/lib/python2.7/site-packages/twisted/python/failure.py", line 393, in throwExceptionIntoGenerator
    return g.throw(self.type, self.value, self.tb)
  File "./ops/tail-logs", line 24, in main
    obj = yield s3.get_object(bucket, item.key)
  File "/home/exarkun/Environments/leastauthority.com/local/lib/python2.7/site-packages/twisted/internet/defer.py", line 653, in _runCallbacks
    current.result = callback(current.result, *args, **kw)
  File "/home/exarkun/Environments/leastauthority.com/local/lib/python2.7/site-packages/txaws/s3/client.py", line 56, in s3_error_wrapper
    error_wrapper(error, S3Error)
  File "/home/exarkun/Environments/leastauthority.com/local/lib/python2.7/site-packages/txaws/client/base.py", line 75, in error_wrapper
    raise fallback_error
txaws.s3.exception.S3Error: Error Message: The specified key does not exist.