The problem is that this returns an Eq instead of False when it is not equal: ``` >>> f = lambda x: x == 1 >>> F = Lambda(x, f(SymbolicEquality(x))) >>> F(1) True >>> F(x) Eq(x, 1) >>> f(x) False ```
On Tuesday, September 28, 2021 at 1:42:27 AM UTC-5 Oscar wrote: > On Tue, 28 Sept 2021 at 04:13, Chris Smith <[email protected]> wrote: > >> I would like to emulate something like this with Basic objects. I am >> drawing a blank on how that might be done. Does anyone have any ideas? >> >>> f=lambda x: x==1 >> >>> f(1) >> True >> >>> Lambda(x, f(x))(1) # doesn't work >> False >> > > Something like this: > > In [7]: cat w.py > class SymbolicEquality: > def __init__(self, sym): > self.sym = sym > def __eq__(self, other): > return Equality(self.sym, other) > > In [8]: f = lambda x: x == 1 > > In [9]: y = Dummy('y') > > In [10]: F = Lambda(y, f(SymbolicEquality(y))) > > In [11]: F > Out[11]: y ↦ y = 1 > > -- > Oscar > -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/13d15197-0d82-4312-b94a-ec59df616aedn%40googlegroups.com.
