def test_softmax_expr():
expr = ast.SoftmaxExpr([ast.NumVal(2.0), ast.NumVal(3.0)])
expected_code = """
import "math"
func score(input []float64) []float64 {
return softmax([]float64{2.0, 3.0})
}
func softmax(x []float64) []float64 {
size := len(x)
result := make([]float64, size)
max := x[0]
for _, v := range x {
if (v > max) {
max = v
}
}
sum := 0.0
for i := 0; i < size; i++ {
result[i] = math.Exp(x[i] - max)
sum += result[i]
}
for i := 0; i < size; i++ {
result[i] /= sum
}
return result
}
"""
interpreter = GoInterpreter()
assert_code_equal(interpreter.interpret(expr), expected_code)
def test_dependable_condition():
left = ast.BinNumExpr(
ast.IfExpr(
ast.CompExpr(ast.NumVal(1), ast.NumVal(1), ast.CompOpType.EQ),
ast.NumVal(1), ast.NumVal(2)), ast.NumVal(2), ast.BinNumOpType.ADD)
right = ast.BinNumExpr(ast.NumVal(1), ast.NumVal(2), ast.BinNumOpType.DIV)
bool_test = ast.CompExpr(left, right, ast.CompOpType.GTE)
expr = ast.IfExpr(bool_test, ast.NumVal(1), ast.FeatureRef(0))
expected_code = """
func score(input []float64) float64 {
var var0 float64
var var1 float64
if (1.0) == (1.0) {
var1 = 1.0
} else {
var1 = 2.0
}
if ((var1) + (2.0)) >= ((1.0) / (2.0)) {
var0 = 1.0
} else {
var0 = input[0]
}
return var0
}"""
interpreter = GoInterpreter()
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
def test_bin_vector_num_expr():
expr = ast.BinVectorNumExpr(ast.VectorVal([ast.NumVal(1),
ast.NumVal(2)]), ast.NumVal(1),
ast.BinNumOpType.MUL)
interpreter = GoInterpreter()
expected_code = """
func addVectors(v1, v2 []float64) []float64 {
result := make([]float64, len(v1))
for i := 0; i < len(v1); i++ {
result[i] = v1[i] + v2[i]
}
return result
}
func mulVectorNumber(v1 []float64, num float64) []float64 {
result := make([]float64, len(v1))
for i := 0; i < len(v1); i++ {
result[i] = v1[i] * num
}
return result
}
func score(input []float64) []float64 {
return mulVectorNumber([]float64{1.0, 2.0}, 1.0)
}"""
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
def test_raw_array():
expr = ast.VectorVal([ast.NumVal(3), ast.NumVal(4)])
expected_code = """
func score(input []float64) []float64 {
return []float64{3.0, 4.0}
}"""
interpreter = GoInterpreter()
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
def __init__(self, model):
self.model_name = "score"
self.model = model
self.interpreter = GoInterpreter()
assembler_cls = get_assembler_cls(model)
self.model_ast = assembler_cls(model).assemble()
self.exec_path = None
def test_atan_expr():
expr = ast.AtanExpr(ast.NumVal(2.0))
interpreter = GoInterpreter()
expected_code = """
import "math"
func score(input []float64) float64 {
return math.Atan(2.0)
}"""
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
def test_log1p_expr():
expr = ast.Log1pExpr(ast.NumVal(2.0))
expected_code = """
import "math"
func score(input []float64) float64 {
return math.Log1p(2.0)
}
"""
interpreter = GoInterpreter()
assert_code_equal(interpreter.interpret(expr), expected_code)
def test_pow_expr():
expr = ast.PowExpr(ast.NumVal(2.0), ast.NumVal(3.0))
expected_code = """
import "math"
func score(input []float64) float64 {
return math.Pow(2.0, 3.0)
}
"""
interpreter = GoInterpreter()
assert_code_equal(interpreter.interpret(expr), expected_code)
def test_bin_num_expr():
expr = ast.BinNumExpr(
ast.BinNumExpr(ast.FeatureRef(0), ast.NumVal(-2),
ast.BinNumOpType.DIV), ast.NumVal(2),
ast.BinNumOpType.MUL)
interpreter = GoInterpreter()
expected_code = """
func score(input []float64) float64 {
return ((input[0]) / (-2.0)) * (2.0)
}"""
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
def test_reused_expr():
reused_expr = ast.ExpExpr(ast.NumVal(1.0), to_reuse=True)
expr = ast.BinNumExpr(reused_expr, reused_expr, ast.BinNumOpType.DIV)
interpreter = GoInterpreter()
expected_code = """
import "math"
func score(input []float64) float64 {
var var0 float64
var0 = math.Exp(1.0)
return (var0) / (var0)
}"""
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
def test_if_expr():
expr = ast.IfExpr(
ast.CompExpr(ast.NumVal(1), ast.FeatureRef(0), ast.CompOpType.EQ),
ast.NumVal(2), ast.NumVal(3))
interpreter = GoInterpreter()
expected_code = """
func score(input []float64) float64 {
var var0 float64
if (1.0) == (input[0]) {
var0 = 2.0
} else {
var0 = 3.0
}
return var0
}"""
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
def test_multi_output():
expr = ast.IfExpr(
ast.CompExpr(ast.NumVal(1), ast.NumVal(1), ast.CompOpType.EQ),
ast.VectorVal([ast.NumVal(1), ast.NumVal(2)]),
ast.VectorVal([ast.NumVal(3), ast.NumVal(4)]))
expected_code = """
func score(input []float64) []float64 {
var var0 []float64
if (1.0) == (1.0) {
var0 = []float64{1.0, 2.0}
} else {
var0 = []float64{3.0, 4.0}
}
return var0
}"""
interpreter = GoInterpreter()
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
def test_sigmoid_expr():
expr = ast.SigmoidExpr(ast.NumVal(2.0))
expected_code = """
import "math"
func score(input []float64) float64 {
return sigmoid(2.0)
}
func sigmoid(x float64) float64 {
if (x < 0.0) {
z := math.Exp(x)
return z / (1.0 + z)
}
return 1.0 / (1.0 + math.Exp(-x))
}
"""
interpreter = GoInterpreter()
assert_code_equal(interpreter.interpret(expr), expected_code)
def test_nested_condition():
left = ast.BinNumExpr(
ast.IfExpr(
ast.CompExpr(ast.NumVal(1), ast.NumVal(1), ast.CompOpType.EQ),
ast.NumVal(1), ast.NumVal(2)), ast.NumVal(2), ast.BinNumOpType.ADD)
bool_test = ast.CompExpr(ast.NumVal(1), left, ast.CompOpType.EQ)
expr_nested = ast.IfExpr(bool_test, ast.FeatureRef(2), ast.NumVal(2))
expr = ast.IfExpr(bool_test, expr_nested, ast.NumVal(2))
expected_code = """
func score(input []float64) float64 {
var var0 float64
var var1 float64
if (1.0) == (1.0) {
var1 = 1.0
} else {
var1 = 2.0
}
if (1.0) == ((var1) + (2.0)) {
var var2 float64
if (1.0) == (1.0) {
var2 = 1.0
} else {
var2 = 2.0
}
if (1.0) == ((var2) + (2.0)) {
var0 = input[2]
} else {
var0 = 2.0
}
} else {
var0 = 2.0
}
return var0
}"""
interpreter = GoInterpreter()
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
class GoExecutor(BaseExecutor):
def __init__(self, model):
self.model_name = "score"
self.model = model
self.interpreter = GoInterpreter()
assembler_cls = get_assembler_cls(model)
self.model_ast = assembler_cls(model).assemble()
self.exec_path = None
def predict(self, X):
exec_args = [str(self.exec_path), *map(utils.format_arg, X)]
return utils.predict_from_commandline(exec_args)
def prepare(self):
if self.model_ast.output_size > 1:
print_code = EXECUTE_AND_PRINT_VECTOR
else:
print_code = EXECUTE_AND_PRINT_SCALAR
executor_code = EXECUTOR_CODE_TPL.format(
model_code=self.interpreter.interpret(self.model_ast),
print_code=print_code)
file_name = self._resource_tmp_dir / f"{self.model_name}.go"
utils.write_content_to_file(executor_code, file_name)
self.exec_path = self._resource_tmp_dir / self.model_name
subprocess.call([
"go",
"build",
"-o",
str(self.exec_path),
str(file_name)
])