I understand how to add new methods to a class at creation time. For Sage's
"standard" class, this implies recompiling (part of) Sage.
I wonder if it is possible to patch a new method in an existing class. For
example, it might be handy to give SR methods for doing what can be
obtained by Maxima's function demoivre and exponentialize. Those methods
would be wrappers for the (existing) functions maxima.demoivre and
maxima.exponentialize, along the lines of
return(maxima.demoivre(self).sage() (ditto for exponentialize).
Simple "monkey patching" doesn't work :
def demoivre( self ):
return(maxima.demoivre(self).sage())
def exponentialize( self ):
return(maxima.exponentialize(self).sage())
sage.symbolic.expression.Expression.demoivre=demoivre
TypeError Traceback (most recent call
last)<ipython-input-98-2d6b16877da1> in <module>() 3 def exponentialize(
self ): 4 return(maxima.exponentialize(self).sage())----> 5
sage.symbolic.expression.Expression.demoivre=demoivre
TypeError: can't set attributes of built-in/extension type
'sage.symbolic.expression.Expression'
What could work ?
--
Emmanuel Charpentier
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