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py3: fix for sort_func returning None as None cannot be ordered in py3

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Kovid Goyal 2019-04-10 21:02:08 +05:30
parent eced0f25b3
commit edfff91424
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GPG Key ID: 06BC317B515ACE7C
1 changed files with 2 additions and 2 deletions
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src/calibre/gui2/widgets2.py
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@ -65,14 +65,14 @@ class HistoryMixin(object):
class HistoryLineEdit2(LineEdit, HistoryMixin):
def __init__(self, parent=None, completer_widget=None, sort_func=lambda x:None):
def __init__(self, parent=None, completer_widget=None, sort_func=lambda x:b''):
LineEdit.__init__(self, parent=parent, completer_widget=completer_widget, sort_func=sort_func)
class HistoryComboBox(EditWithComplete, HistoryMixin):
def __init__(self, parent=None):
EditWithComplete.__init__(self, parent, sort_func=lambda x:None)
EditWithComplete.__init__(self, parent, sort_func=lambda x:b'')
class ColorButton(QPushButton):