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detag handle None

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This commit is contained in:
James Ralston 2010-03-07 23:18:26 -08:00
parent 43d6a53d7b
commit 450e9ef176
1 changed files with 2 additions and 0 deletions
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2
src/calibre/ebooks/chm/metadata.py
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@ -19,6 +19,8 @@ def _clean(s):
def _detag(tag):
str = u""
if tag is None:
return str
for elem in tag:
if hasattr(elem, "contents"):
str += _detag(elem)