code style: sympy/matrices
code style: sympy/ntheory
code style: sympy/parsing
code style: sympy/physics
code style: sympy/plotting
code style: sympy/polys
code style: sympy/printing
code style: sympy/series
code style: sympy/sets
code style: sympy/simplify
code style: sympy/solvers
code style: sympy/statistics
code style: sympy/stats
code style: sympy/strategies
code style: sympy/tensor
code style: sympy/unify
code style: sympy/utilities