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Comparing Directory Authority Flags
===================================
.. image:: /_static/buttons/back.png
:target: ../double_double_toil_and_trouble.html
Compares the votes of two directory authorities, in this case moria1 and
maatuska, with a special interest in the 'Running' flag.
::
from stem.descriptor import DocumentHandler, remote
# Query all authority votes asynchronously.
downloader = remote.DescriptorDownloader(document_handler = DocumentHandler.DOCUMENT)
queries = {}
for name, authority in remote.get_authorities().items():
if authority.v3ident is None:
continue # authority doens't vote if it lacks a v3ident
queries[name] = downloader.get_vote(authority)
# Wait for the votes to finish being downloaded, this produces a dictionary of
# authority nicknames to their vote.
votes = dict((name, query.run()[0]) for (name, query) in queries.items())
# Get a superset of all the fingerprints in all the votes.
all_fingerprints = set()
for vote in votes.values():
all_fingerprints.update(vote.routers.keys())
# Finally, compare moria1's votes to maatuska.
for fingerprint in all_fingerprints:
moria1_vote = votes['moria1'].routers.get(fingerprint)
maatuska_vote = votes['maatuska'].routers.get(fingerprint)
if not moria1_vote and not maatuska_vote:
print "both moria1 and maatuska haven't voted about %s" % fingerprint
elif not moria1_vote:
print "moria1 hasn't voted about %s" % fingerprint
elif not maatuska_vote:
print "maatuska hasn't voted about %s" % fingerprint
elif 'Running' in moria1_vote.flags and 'Running' not in maatuska_vote.flags:
print "moria1 has the Running flag but maatuska doesn't: %s" % fingerprint
elif 'Running' in maatuska_vote.flags and 'Running' not in moria1_vote.flags:
print "maatuska has the Running flag but moria1 doesn't: %s" % fingerprint
::
% python compare_flags.py
maatuska has the Running flag but moria1 doesn't: 92FCB6748A40E6088E22FBAB943AB2DD743EA818
maatuska has the Running flag but moria1 doesn't: 6871F682350BA931838C0EC1E4A23044DAE06A73
maatuska has the Running flag but moria1 doesn't: E2BB13AA2F6960CD93ABE5257A825687F3973C62
moria1 has the Running flag but maatuska doesn't: 546C54E2A89D88E0794D04AECBF1AC8AC9DA81DE
moria1 has the Running flag but maatuska doesn't: DCAEC3D069DC39AAE43D13C8AF31B5645E05ED61
...
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