Dear List,
i am writing since i would like to define the output of the derivative of a
function, and i don't have a clue of how to achieve it
to explain what i wish to do, let's consider the following script
from sympy import *
u = symbols('u')
der = symbols('der')
e = symbols('e', cls=Function)(u)
s = symbols('s', cls=Function)(e)
Derivative(e,u) = der #essentially i would like to teach to sympy to use a
symbol for the Derivative
---> but here i get "SyntaxError: can't assign to function call"
print(diff(e,u))
print(diff(s,e))
print(diff(s,u)) #here i would like "der" to be replaced within the chain
rule
any suggestion would be very welcome...
regards
Riccardo
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