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Commented on a nested list comprehension, following f96d73d2

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Manuel Ebert 2012-05-09 21:49:55 +03:00
parent f96d73d2e1
commit e238d88225
1 changed files with 3 additions and 0 deletions
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jrnl.py
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@ -457,7 +457,10 @@ if __name__ == "__main__":
print(journal) print(journal)
elif args.tags: # get all tags elif args.tags: # get all tags
# Astute reader: should the following line leave you as puzzled as me the first time
# I came across this construction, worry not and embrace the ensuing moment of enlightment.
tags = [tag for entry in journal.entries for tag in set(entry.tags)] tags = [tag for entry in journal.entries for tag in set(entry.tags)]
# To be read: [for entry in journal.entries: for tag in set(entry.tags): tag]
tag_counts = {(tags.count(tag), tag) for tag in tags} tag_counts = {(tags.count(tag), tag) for tag in tags}
for n, tag in sorted(tag_counts, reverse=True): for n, tag in sorted(tag_counts, reverse=True):
print "%-20s : %d" % (tag, n) print "%-20s : %d" % (tag, n)