code style: sympy/assumptions
code style: sympy/combinatorics
code style: sympy/concrete
code style: sympy/conftest
code style: sympy/core
code style: sympy/diffgeom
code style: sympy/external
code style: sympy/functions
code style: sympy/galgebra
code style: sympy/geometry
code style: sympy/integrals
code style: sympy/interactive
code style: sympy/logic
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