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Also fallback to version 0 regexps for reading metadata from filenames

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Fixes #1898739 [Viewer fail opening books](https://bugs.launchpad.net/calibre/+bug/1898739)
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Kovid Goyal 2020-10-06 20:23:55 +05:30
parent 45f9e9318c
commit 019f1c8fb2
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1 changed files with 4 additions and 1 deletions
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src/calibre/ebooks/metadata/meta.py
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@ -133,7 +133,10 @@ def metadata_from_filename(name, pat=None, fallback_pat=None):
name = name.rpartition('.')[0]
mi = MetaInformation(None, None)
if pat is None:
try:
pat = regex.compile(prefs.get('filename_pattern'), flags=regex.UNICODE | regex.VERSION1 | regex.FULLCASE)
except Exception:
pat = regex.compile(prefs.get('filename_pattern'), flags=regex.UNICODE | regex.VERSION0 | regex.FULLCASE)
name = name.replace('_', ' ')
match = pat.search(name)
if match is None and fallback_pat is not None: