Most logging systems can tell you what happened; Eliot tells you *why* it
happened:
$ python linkcheck.py | eliot-tree
4c42a789-76f5-4f0b-b154-3dd0e3041445
+-- check_links@1/started
`-- urls: [u'http://google.com', u'http://nosuchurl']
+-- download@2,1/started
`-- url: http://google.com
+-- download@2,2/succeeded
+-- download@3,1/started
`-- url: http://nosuchurl
+-- download@3,2/failed
|-- exception: requests.exceptions.ConnectionError
|-- reason: ('Conn aborted', gaierror(-2, 'Name unknown'))
+-- check_links@4/failed
|-- exception: exceptions.ValueError
|-- reason: ('Conn aborted.', gaierror(-2, 'Name unknown'))
And here's the code that generated these logs (eliot-tree
<https://warehouse.python.org/project/eliot-tree/> was used to render the
output):
import sys
from eliot import start_action, to_file
import requests
to_file(sys.stdout)
def check_links(urls):
with start_action(action_type="check_links", urls=urls):
for url in urls:
try:
with start_action(action_type="download", url=url):
response = requests.get(url)
response.raise_for_status()
except Exception as e:
raise ValueError(str(e))
check_links(["http://google.com";], ["http://nosuchurl";])
Interested? Read more at https://eliot.readthedocs.org/.
Eliot is released under the Apache License 2 by ClusterHQ
<https://clusterhq.com>, the Container Data People. We're hiring!
<https://clusterhq.com/careers/>
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