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Micro-optimization for get_categories()

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Kovid Goyal 2013-07-23 08:47:01 +05:30
parent a1581e1433
commit e1ed5f679f
1 changed files with 2 additions and 1 deletions
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src/calibre/db/fields.py
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@ -114,6 +114,7 @@ class Field(object):
if not self.is_many: if not self.is_many:
return ans return ans
id_map = self.table.id_map
special_sort = hasattr(self, 'category_sort_value') special_sort = hasattr(self, 'category_sort_value')
for item_id, item_book_ids in self.table.col_book_map.iteritems(): for item_id, item_book_ids in self.table.col_book_map.iteritems():
if book_ids is not None: if book_ids is not None:
@ -122,7 +123,7 @@ class Field(object):
ratings = tuple(r for r in (book_rating_map.get(book_id, 0) for ratings = tuple(r for r in (book_rating_map.get(book_id, 0) for
book_id in item_book_ids) if r > 0) book_id in item_book_ids) if r > 0)
avg = sum(ratings)/len(ratings) if ratings else 0 avg = sum(ratings)/len(ratings) if ratings else 0
name = self.category_formatter(self.table.id_map[item_id]) name = self.category_formatter(id_map[item_id])
sval = (self.category_sort_value(item_id, item_book_ids, lang_map) sval = (self.category_sort_value(item_id, item_book_ids, lang_map)
if special_sort else name) if special_sort else name)
c = tag_class(name, id=item_id, sort=sval, avg=avg, c = tag_class(name, id=item_id, sort=sval, avg=avg,