Status: New Owner: ---- Labels: Type-Defect Priority-Medium
New issue 3313 by laurence.gonsalves: Function class violates Liskov substitution principle
http://code.google.com/p/sympy/issues/detail?id=3313
import sympy a = sympy.Function('a') a(5)
a(5)
class FooFunction(sympy.Function):
... pass ...
b = FooFunction('b') b(5)
Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: 'FooFunction' object is not callable Why is a callable but b isn't? -- You received this message because you are subscribed to the Google Groups "sympy-issues" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/sympy-issues?hl=en.
