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mediumsympy/sympy · v1.0

`Permutation` constructor fails with non-disjoint cycles

mathsymbolicbase c807dfe756
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Problem statement

Calling Permutation([[0,1],[0,1]]) raises a ValueError instead of constructing the identity permutation. If the cycles passed in are non-disjoint, they should be applied in left-to-right order and the resulting permutation should be returned.

This should be easy to compute. I don't see a reason why non-disjoint cycles should be forbidden.

The environment starts at commit c807dfe75696 (sympy/sympy 1.0), dependencies installed and tests runnable from the first minute. You are graded by hidden tests taken from the fix that was actually merged upstream.