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USBMS: books emthod should always returna n object of type BookList

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Kovid Goyal 2010-05-16 21:55:09 -06:00
parent f4a02e09d6
commit feb5a6f059
1 changed files with 5 additions and 3 deletions
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8
src/calibre/devices/usbms/driver.py
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@ -45,15 +45,17 @@ class USBMS(CLI, Device):
def books(self, oncard=None, end_session=True): def books(self, oncard=None, end_session=True):
from calibre.ebooks.metadata.meta import path_to_ext from calibre.ebooks.metadata.meta import path_to_ext
dummy_bl = BookList(None, None, None)
if oncard == 'carda' and not self._card_a_prefix: if oncard == 'carda' and not self._card_a_prefix:
self.report_progress(1.0, _('Getting list of books on device...')) self.report_progress(1.0, _('Getting list of books on device...'))
return [] return dummy_bl
elif oncard == 'cardb' and not self._card_b_prefix: elif oncard == 'cardb' and not self._card_b_prefix:
self.report_progress(1.0, _('Getting list of books on device...')) self.report_progress(1.0, _('Getting list of books on device...'))
return [] return dummy_bl
elif oncard and oncard != 'carda' and oncard != 'cardb': elif oncard and oncard != 'carda' and oncard != 'cardb':
self.report_progress(1.0, _('Getting list of books on device...')) self.report_progress(1.0, _('Getting list of books on device...'))
return [] return dummy_bl
prefix = self._card_a_prefix if oncard == 'carda' else \ prefix = self._card_a_prefix if oncard == 'carda' else \
self._card_b_prefix if oncard == 'cardb' \ self._card_b_prefix if oncard == 'cardb' \