Avell Diroll:
keys = [key for key in sampledict if sampledict[key] == '1974']
Or better, given:
sampledict = {'the Holy Grail':1975, 'Life of Brian':1979,
'Party Political Broadcast':1974,'Mr. Neutron':1974,
'Hamlet':1974, 'Light Entertainment War':1974}
keys = [key for key,year in sampledict.iteritems() if year == 1974]
print keys
Another solution is a two-way (bidirectional) dict:
http://cheeseshop.python.org/pypi/two_way_dict/0.2
Bye,
bearophile
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