def test_block_attr_regular():
b = gluon.Block()
# set block attribute also sets _children
b.c = gluon.Block()
c2 = gluon.Block()
b.c = c2
assert b.c is c2 and list(b._children.values())[0] is c2
def test_block_attr_param():
b = gluon.Block()
# regular variables can't change types
b.b = gluon.Parameter()
b.b = (2,)
def test_block_attr_hidden():
b = gluon.Block()
# regular attributes can change types
b.a = None
b.a = 1
