Some of these are from the use of a matrix norm, which # needs scipy.

Also a norm-related change in sage.modules.free_module_integer - avoiding use of norm, which send us into symbolics land, in favor of just comparing norm squares

• Cherry-picked from Modularization of sagelib: Distributions sagemath-{brial,combinat,eclib,flint,gap,giac,glpk,graphs,groups,homfly,lcalc,libbraiding,libecm,linbox,modules,mpmath,ntl,pari,plot,polyhedra,schemes,singular,standard-no-symbolics,symbolics} #35095.

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