Message8794

Observe:

Jython 2.7b3+ (default:68cf3c217269+, Jun 23 2014, 08:17:03) 
[Java HotSpot(TM) 64-Bit Server VM (Oracle Corporation)] on java1.7.0_60
Type "help", "copyright", "credits" or "license" for more information.
>>> (10).__pow__(10L)
NotImplemented
>>> (10).__add__(10L)
NotImplemented


This is caused by `canCoerce()` guards peppered throughout PyInteger method implementation, which simply test if the argument is an instance of PyInteger, which PyLong is not.