def test_merge_outputs(self):
x, y, z = inputs()
e1 = op3(op2(x, y))
e2 = op3(op2(x, y))
g = FunctionGraph([x, y, z], [e1, e2])
MergeOptimizer().optimize(g)
assert str(g) == "FunctionGraph(*1 -> Op3(Op2(x, y)), *1)"
def test_replace(self):
var1 = MyVariable("var1")
var2 = MyVariable("var2")
var3 = op1(var2, var1)
var4 = op2(var3, var2)
var5 = op3(var4, var2, var2)
fg = FunctionGraph([var1, var2], [var3, var5], clone=False)
with pytest.raises(Exception, match="Cannot replace.*"):
var4.fgraph = object()
# Trigger a `FunctionGraph` ownership error
fg.replace(var4, var1, verbose=True)
var4.fgraph = fg
with pytest.raises(BadOptimization):
var0 = MyVariable2("var0")
# The types don't match and one cannot be converted to the other
fg.replace(var3, var0)
# Test a basic replacement
fg.replace_all([(var3, var1)])
assert var3 not in fg.variables
assert fg.apply_nodes == {var4.owner, var5.owner}
assert var4.owner.inputs == [var1, var2]
def test_change_input(self):
var1 = MyVariable("var1")
var2 = MyVariable("var2")
var3 = op1(var2, var1)
var4 = op2(var3, var2)
var5 = op3(var4, var2, var2)
fg = FunctionGraph([var1, var2], [var3, var5], clone=False)
var6 = MyVariable2("var6")
with pytest.raises(TypeError):
fg.change_input("output", 1, var6)
with pytest.raises(TypeError):
fg.change_input(var5.owner, 1, var6)
old_apply_nodes = set(fg.apply_nodes)
old_variables = set(fg.variables)
old_var5_clients = list(var5.clients)
# We're replacing with the same variable, so nothing should happen
fg.change_input(var5.owner, 1, var2)
assert old_apply_nodes == fg.apply_nodes
assert old_variables == fg.variables
assert old_var5_clients == var5.clients
# Perform a valid `Apply` node input change
fg.change_input(var5.owner, 1, var1)
assert var5.owner.inputs[1] is var1
assert (var5.owner, 1) not in var2.clients
def test_import_var(self):
var1 = MyVariable("var1")
var2 = MyVariable("var2")
var3 = op1(var2, var1)
var4 = op2(var3, var2)
var5 = op3(var4, var2, var2)
fg = FunctionGraph([var1, var2], [var3, var5], clone=False)
with pytest.raises(MissingInputError):
var0 = MyVariable("var0")
# We can't import a new `FunctionGraph` input (i.e. something
# without an owner)
fg.import_var(var0, "testing")
var5 = op2()
# We can import variables with owners
fg.import_var(var5, "testing")
assert var5 in fg.variables
assert var5.owner in fg.apply_nodes
with pytest.raises(TypeError, match="Computation graph contains.*"):
from theano.gof.null_type import NullType
fg.import_var(NullType()(), "testing")
def test_check_integrity(self):
var1 = MyVariable("var1")
var2 = MyVariable("var2")
var3 = op1(var2, var1)
var4 = op2(var3, var2)
var5 = op3(var4, var2, var2)
fg = FunctionGraph([var1, var2], [var3, var5], clone=False)
with pytest.raises(Exception, match="The nodes are .*"):
fg.apply_nodes.remove(var5.owner)
fg.check_integrity()
with pytest.raises(Exception, match="Inconsistent clients.*"):
fg.apply_nodes.add(var5.owner)
fg.remove_client(var2, (var5.owner, 1))
fg.check_integrity()
fg.add_client(var2, (var5.owner, 1))
with pytest.raises(Exception, match="The variables are.*"):
fg.variables.remove(var4)
fg.check_integrity()
fg.variables.add(var4)
with pytest.raises(Exception, match="Undeclared input.*"):
var6 = MyVariable2("var6")
fg.clients[var6] = [(var5.owner, 3)]
fg.variables.add(var6)
var5.owner.inputs.append(var6)
fg.check_integrity()
fg.variables.remove(var6)
var5.owner.inputs.remove(var6)
# TODO: What if the index value is greater than 1? It will throw an
# `IndexError`, but that doesn't sound like anything we'd want.
with pytest.raises(Exception, match="Inconsistent clients list.*"):
fg.add_client(var4, ("output", 1))
fg.check_integrity()
fg.remove_client(var4, ("output", 1))
with pytest.raises(Exception, match="Client not in FunctionGraph.*"):
fg.add_client(var4, (var6.owner, 0))
fg.check_integrity()
fg.remove_client(var4, (var6.owner, 0))
with pytest.raises(Exception, match="Inconsistent clients list.*"):
fg.add_client(var4, (var3.owner, 0))
fg.check_integrity()
def test_multi(self):
x, y, z = inputs()
e0 = op1(x, y)
e = op3(op4(e0), e0)
g = FunctionGraph([x, y, z], [e])
PatternOptimizer((op4, (op1, "x", "y")), (op3, "x", "y")).optimize(g)
assert str(g) == "FunctionGraph(Op3(Op4(*1 -> Op1(x, y)), *1))"
def test_replace_test_value(self):
var1 = MyVariable("var1")
var1.tag.test_value = 1
var2 = MyVariable("var2")
var2.tag.test_value = 2
var3 = op1(var2, var1)
var4 = op2(var3, var2)
var4.tag.test_value = np.array([1, 2])
var5 = op3(var4, var2, var2)
fg = FunctionGraph([var1, var2], [var3, var5], clone=False)
var6 = op3()
var6.tag.test_value = np.array(0)
assert var6.tag.test_value.shape != var4.tag.test_value.shape
with pytest.raises(AssertionError, match="The replacement.*"):
fg.replace(var4, var6)
def test_contains(self):
var1 = MyVariable("var1")
var2 = MyVariable("var2")
var3 = op1(var2, var1)
var4 = op2(var3, var2)
var5 = op3(var4, var2, var2)
fg = FunctionGraph([var1, var2], [var3, var5], clone=False)
assert var1 in fg
assert var3 in fg
assert var3.owner in fg
assert var5 in fg
assert var5.owner in fg
def test_replace_bad_state(self):
var1 = MyVariable("var1")
var2 = MyVariable("var2")
var3 = op1(var2, var1)
var4 = op2(var3, var2)
var5 = op3(var4, var2, var2)
fg = FunctionGraph([var1, var2], [var3, var5], clone=False)
with pytest.raises(MissingInputError):
var0 = MyVariable("var0")
# FIXME TODO XXX: This breaks the state of the `FunctionGraph`,
# because it doesn't check for validity of the replacement *first*.
fg.replace(var1, var0, verbose=True)
def test_multiple_merges(self):
x, y, z = inputs()
e1 = op1(x, y)
e2 = op2(op3(x), y, z)
e = op1(e1, op4(e2, e1), op1(e2))
g = FunctionGraph([x, y, z], [e])
MergeOptimizer().optimize(g)
strg = str(g)
# note: graph.as_string can only produce the following two possibilities, but if
# the implementation was to change there are 6 other acceptable answers.
assert (
strg == "[Op1(*1 -> Op1(x, y), Op4(*2 -> Op2(Op3(x), y, z), *1), Op1(*2))]"
or strg
== "[Op1(*2 -> Op1(x, y), Op4(*1 -> Op2(Op3(x), y, z), *2), Op1(*1))]"
)
def test_replace_circular(self):
"""`FunctionGraph` allows cycles--for better or worse."""
var1 = MyVariable("var1")
var2 = MyVariable("var2")
var3 = op1(var2, var1)
var4 = op2(var3, var2)
var5 = op3(var4, var2, var2)
fg = FunctionGraph([var1, var2], [var3, var5], clone=False)
fg.replace_all([(var3, var4)])
# The following works (and is kind of gross), because `var4` has been
# mutated in-place
assert fg.apply_nodes == {var4.owner, var5.owner}
assert var4.owner.inputs == [var4, var2]
def test_1(self):
x, y, z = map(MyVariable, "xyz")
e = op3(op4(x, y))
g = FunctionGraph([x, y, z], [e])
# print g
opt = EquilibriumOptimizer(
[
PatternSub((op1, "x", "y"), (op2, "x", "y")),
PatternSub((op4, "x", "y"), (op1, "x", "y")),
PatternSub((op3, (op2, "x", "y")), (op4, "x", "y")),
],
max_use_ratio=10,
)
opt.optimize(g)
# print g
assert str(g) == "FunctionGraph(Op2(x, y))"
def test_remove_client(self):
var1 = MyVariable("var1")
var2 = MyVariable("var2")
var3 = op1(var2, var1)
var4 = op2(var3, var2)
var5 = op3(var4, var2, var2)
fg = FunctionGraph([var1, var2], [var3, var5], clone=False)
assert fg.variables == {var1, var2, var3, var4, var5}
assert fg.clients(var2) == [
(var3.owner, 0),
(var4.owner, 1),
(var5.owner, 1),
(var5.owner, 2),
]
fg.remove_client(var2, (var4.owner, 1))
assert fg.clients(var2) == [
(var3.owner, 0),
(var5.owner, 1),
(var5.owner, 2),
]
fg.remove_client(var1, (var3.owner, 1))
assert fg.clients(var1) == []
assert var4.owner in fg.apply_nodes
# This next `remove_client` should trigger a complete removal of `var4`'s
# variables and `Apply` node from the `FunctionGraph`.
#
# Also, notice that we already removed `var4` from `var2`'s client list
# above, so, when we completely remove `var4`, `fg.remove_client` will
# attempt to remove `(var4.owner, 1)` from `var2`'s client list again.
# This attempt would previously raise a `ValueError` exception, because
# the entry was not in the list.
fg.remove_client(var4, (var5.owner, 0), reason="testing")
assert var4.owner not in fg.apply_nodes
assert var4.owner.tag.removed_by == ["testing"]
assert not any(o in fg.variables for o in var4.owner.outputs)
def test_import_node(self):
var1 = MyVariable("var1")
var2 = MyVariable("var2")
var3 = op1(var2, var1)
var4 = op2(var3, var2)
var5 = op3(var4, var2, var2)
fg = FunctionGraph([var1, var2], [var3, var5], clone=False)
var5 = MyVariable("var5")
var6 = op2(var5)
with pytest.raises(MissingInputError):
fg.import_node(var6.owner)
var6 = op2(var2)
assert not hasattr(var6.owner.tag, "imported_by")
fg.import_node(var6.owner)
assert hasattr(var6.owner.tag, "imported_by")
assert var6 in fg.variables
assert var6.owner in fg.apply_nodes
assert (var6.owner, 0) in var2.clients
def test_low_use_ratio(self):
x, y, z = map(MyVariable, "xyz")
e = op3(op4(x, y))
g = FunctionGraph([x, y, z], [e])
# print 'before', g
# display pesky warnings along with stdout
# also silence logger for 'theano.gof.opt'
_logger = logging.getLogger("theano.gof.opt")
oldlevel = _logger.level
_logger.setLevel(logging.CRITICAL)
try:
opt = EquilibriumOptimizer(
[
PatternSub((op1, "x", "y"), (op2, "x", "y")),
PatternSub((op4, "x", "y"), (op1, "x", "y")),
PatternSub((op3, (op2, "x", "y")), (op4, "x", "y")),
],
max_use_ratio=1.0 / len(g.apply_nodes),
) # each opt can only be applied once
opt.optimize(g)
finally:
_logger.setLevel(oldlevel)
# print 'after', g
assert str(g) == "FunctionGraph(Op1(x, y))"
def test_no_merge(self):
x, y, z = inputs()
e = op1(op3(op2(x, y)), op3(op2(y, x)))
g = FunctionGraph([x, y, z], [e])
MergeOptimizer().optimize(g)
assert str(g) == "FunctionGraph(Op1(Op3(Op2(x, y)), Op3(Op2(y, x))))"
def test_deep_merge(self):
x, y, z = inputs()
e = op1(op3(op2(x, y), z), op4(op3(op2(x, y), z)))
g = FunctionGraph([x, y, z], [e])
MergeOptimizer().optimize(g)
assert str(g) == "FunctionGraph(Op1(*1 -> Op3(Op2(x, y), z), Op4(*1)))"
def test_straightforward_2(self):
x, y, z = inputs()
e = op1(op2(x), op3(y), op4(z))
g = FunctionGraph([x, y, z], [e])
OpSubOptimizer(op3, op4).optimize(g)
assert str(g) == "FunctionGraph(Op1(Op2(x), Op4(y), Op4(z)))"