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| @@ -106,7 +106,10 b' class HistoryAccessor(Configurable):' | |||||
| 106 | db = Any() |
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106 | db = Any() | |
| 107 | def _db_changed(self, name, old, new): |
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107 | def _db_changed(self, name, old, new): | |
| 108 | """validate the db, since it can be an Instance of two different types""" |
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108 | """validate the db, since it can be an Instance of two different types""" | |
| 109 | if not isinstance(new, (sqlite3.Connection, DummyDB)): |
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109 | connection_types = (DummyDB,) | |
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110 | if sqlite3 is not None: | |||
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111 | connection_types = (DummyDB, sqlite3.Connection) | |||
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112 | if not isinstance(new, connection_types): | |||
| 110 | msg = "%s.db must be sqlite3 Connection or DummyDB, not %r" % \ |
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113 | msg = "%s.db must be sqlite3 Connection or DummyDB, not %r" % \ | |
| 111 | (self.__class__.__name__, new) |
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114 | (self.__class__.__name__, new) | |
| 112 | raise TraitError(msg) |
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115 | raise TraitError(msg) | |
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