easysympy/sympy · v1.9

Wrong Derivative kind attribute

math symbolicbase b4777fdcef

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Problem statement

I'm playing around with the kind attribute.

The following is correct:

from sympy import Integral, Derivative
from sympy import MatrixSymbol
from sympy.abc import x
A = MatrixSymbol('A', 2, 2)
i = Integral(A, x)
i.kind
# MatrixKind(NumberKind)

This one is wrong:

d = Derivative(A, x)
d.kind
# UndefinedKind

The environment starts at commit b4777fdcef46 (sympy/sympy 1.9), dependencies installed and tests runnable from the first minute. You are graded by hidden tests taken from the fix that was actually merged upstream.