ConsoleWidget(): `RuntimeError: You can't initialize an object twice!` with traitlets master
See original GitHub issuefrom qtconsole.qt import QtGui
from qtconsole.console_widget import ConsoleWidget
QtGui.QApplication.instance() or QtGui.QApplication([])
cw = ConsoleWidget()
Results in
Traceback (most recent call last):
File "../../canopy-jupyter/scratch.py", line 4, in <module>
cw = ConsoleWidget()
File "/home/pankaj/work/enthought/jupyter/qtconsole/qtconsole/console_widget.py", line 214, in __init__
LoggingConfigurable.__init__(self, **kw)
File "/home/pankaj/work/enthought/jupyter/traitlets/traitlets/config/configurable.py", line 74, in __init__
super(Configurable, self).__init__(**kwargs)
File "/home/pankaj/work/enthought/jupyter/traitlets/traitlets/traitlets.py", line 946, in __init__
super(HasTraits, self).__init__()
RuntimeError: You can't initialize an object twice!
with traitlets master. This is because of mixing old-style and __init__
call and super
__init__
call.
Simple git bisect
indicated the causal commit to be: https://github.com/ipython/traitlets/pull/174
A solution would be to do things similar to SuperQObject
https://github.com/jupyter/qtconsole/blob/master/qtconsole/util.py#L48 , i.e. a SuperQWidget
, and probably any other Super
qobject subclass which needs to be used in multiple inheritance with HasTraits.
Issue Analytics
- State:
- Created 8 years ago
- Comments:7 (3 by maintainers)
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Downgrading traitlets to traitlets==4.1.0 solves the issue.
I opened #114, which seems to fix this.