[PyQt] A error in the examples??

[levinie]

The examples is really great, it tell me how to use PyQt5.When i run the  examples/layouts/flowlayout.py, it throw a exception ,as follow.


    size += QSize(2 * self.margin(), 2 * self.margin())
AttributeError: 'Flow_Layout' object has no attribute 'margin'.



Same error is in borderlayout.py, and basiclayouts.py is OK.
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