I want to equip an Symbol with an additional attribute to store some
specific information right in place.
For 'normal' Python classes it is no problem to dynamically create an
additional attribute for an already existing instance.
However, for sympy Symbols if I try
x = Symbol('x')
x.k = 0
I get the error
AttributeError: 'Symbol' object has no attribute 'k'
Is there any possibility to equip the Symbol x with this attribute?
I already tried this workarround:
class ExtendedSymbol(sp.Symbol):
pass
x = ExtendendSymbol('x')
x.k = 0 # no problem here
However then I have the following unwanted behavior:
x2 = sp.Symbol('x')
x2 == x # -> False
Any ideas?
Best regards,
Carsten.
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