Krastanov

sympy_master --------A---------B----------C-----Merge_commit--------D   <--my_pull_request_branch_1
                         \                       /
                          \-----E---------F-----/
                                          ^--my_pull_request_branch_2

Is it ok to have those two branches as pull requests? Does it matter which one goes in first?

Krastanov

At the moment we have:
======================

<~~~ is for metaclasses
| \ or / is for subclasses

      Basic <~~~~~~~~ WithAssumptions
blah  /   \                    |
   \ /     \                   |
   Expr   Application <~~~ FunctionClass

Krastanov

from itertools import groupby

from sympy.core import S, sympify, Mul, Basic, Expr, Dummy, Symbol, Integer
from sympy.combinatorics import Permutation

from sympy.matrices.expressions import MatMul, MatrixExpr, Trace
from sympy.matrices import MatrixBase, ImmutableMatrix

from sympy.physics.matrices import mgamma