Is there a way to get the actual expression once the ufunc is complied?
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Tanu Hari Dixit
Dec 25, 2015, 7:41:34 AM12/25/15
to sympy
I tried out this to get the expression
>>> from sympy import symbols
>>> from sympy.utilities.autowrap import ufuncify
>>> x=symbols('x')
>>> expr=x**2 +x**4 +1
>>> binary_fu=ufuncify(x, expr)
>>> binary_fu(x)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: ufunc 'wrapper_module_0' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe''
This is expected because a ufunc will expect an array. Is there a way to get the expression once one has ufuncified it?
(This is trivial in case of lambify)
>>> lambdified_poly=lambdify(x,expr)
>>> lambdified_poly(x)
x**4 + x**2 + 1
Please help me.
>>> from sympy import symbols
>>> from sympy.utilities.autowrap import ufuncify
>>> x=symbols('x')
>>> expr=x**2 +x**4 +1
>>> binary_fu=ufuncify(x, expr)
>>> binary_fu(x)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: ufunc 'wrapper_module_0' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe''
This is expected because a ufunc will expect an array. Is there a way to get the expression once one has ufuncified it?
(This is trivial in case of lambify)
>>> lambdified_poly=lambdify(x,expr)
>>> lambdified_poly(x)
x**4 + x**2 + 1
Please help me.
Jason Moore
Dec 25, 2015, 12:07:05 PM12/25/15
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lambdify works in this case because it, by default, generates sympy expressions. Lambdify is unique in this case. All of the others based on autowrap will not accept sympy types.
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Tanu Hari Dixit
Dec 25, 2015, 12:14:26 PM12/25/15
to sympy
Thank you!
Aaron Meurer
Dec 25, 2015, 4:41:07 PM12/25/15
to sy...@googlegroups.com
lambdify generates numpy functions by default. This only works because
there are no functions in the expression (just multiplication,
addition, and powers).
To answer the original question, as far as I can tell, the original
expression is not saved anywhere in the ufuncified function.
Aaron Meurer
> https://groups.google.com/d/msgid/sympy/CAP7f1AhRxHHxr%2B6H%2BO1iv5fQJVhnOW%3D8%2BRDahzEQdAGP_%2BCWEQ%40mail.gmail.com.
there are no functions in the expression (just multiplication,
addition, and powers).
To answer the original question, as far as I can tell, the original
expression is not saved anywhere in the ufuncified function.
Aaron Meurer
Tanu Hari Dixit
Dec 26, 2015, 6:28:18 AM12/26/15
to sympy
Thank you!
On Friday, December 25, 2015 at 6:11:34 PM UTC+5:30, Tanu Hari Dixit wrote:
On Friday, December 25, 2015 at 6:11:34 PM UTC+5:30, Tanu Hari Dixit wrote:
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