""" Merge explicit MatrixBase arguments
>>> from diofant import MatrixSymbol, eye, Matrix, MatAdd, pprint
>>> from diofant.matrices.expressions.matadd import merge_explicit
>>> A = MatrixSymbol('A', 2, 2)
>>> B = eye(2)
>>> C = Matrix([[1, 2], [3, 4]])
>>> X = MatAdd(A, B, C)
>>> pprint(X, use_unicode=False)
A + [1 0] + [1 2]
[ ] [ ]
[0 1] [3 4]
>>> pprint(merge_explicit(X), use_unicode=False)
A + [2 2]
[ ]
[3 5]
"""
groups = sift(matadd.args, lambda arg: isinstance(arg, MatrixBase))
if len(groups[True]) > 1:
return MatAdd(*(groups[False] + [reduce(add, groups[True])]))
else:
return matadd
rules = (rm_id(lambda x: x == 0 or isinstance(x, ZeroMatrix)), unpack, flatten,
glom(matrix_of, factor_of,
combine), merge_explicit, sort(default_sort_key))
canonicalize = exhaust(
condition(lambda x: isinstance(x, MatAdd), do_one(rules)))
def test_sort():
assert sort(str)(Basic(3, 1, 2)) == Basic(1, 2, 3)
def test_sort():
assert sort(str)(Basic(3, 1, 2)) == Basic(1, 2, 3)