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 = """
def score(input):
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 = PythonInterpreter()
utils.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 = """
def score(input):
if (1.0) == (1.0):
var1 = 1.0
else:
var1 = 2.0
if (1.0) == ((var1) + (2.0)):
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 = PythonInterpreter()
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
def test_raw_array():
expr = ast.VectorVal([ast.NumVal(3), ast.NumVal(4)])
expected_code = """
def score(input):
return [3.0, 4.0]
"""
interpreter = PythonInterpreter()
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
def test_abs_expr():
expr = ast.AbsExpr(ast.NumVal(-1.0))
expected_code = """
def score(input):
return abs(-1.0)
"""
interpreter = PythonInterpreter()
assert_code_equal(interpreter.interpret(expr), expected_code)
def test_atan_expr():
expr = ast.AtanExpr(ast.NumVal(2.0))
expected_code = """
import math
def score(input):
return math.atan(2.0)
"""
interpreter = PythonInterpreter()
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
def score(input):
return math.pow(2.0, 3.0)
"""
interpreter = PythonInterpreter()
assert_code_equal(interpreter.interpret(expr), expected_code)
def test_log1p_expr():
expr = ast.Log1pExpr(ast.NumVal(2.0))
interpreter = PythonInterpreter()
expected_code = """
import math
def score(input):
return math.log1p(2.0)
"""
utils.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)
expected_code = """
def score(input):
return ((input[0]) / (-2.0)) * (2.0)
"""
interpreter = PythonInterpreter()
assert_code_equal(interpreter.interpret(expr), expected_code)
def test_sqrt_fallback_expr():
expr = ast.SqrtExpr(ast.NumVal(2.0))
interpreter = PythonInterpreter()
interpreter.sqrt_function_name = NotImplemented
expected_code = """
import math
def score(input):
return math.pow(2.0, 0.5)
"""
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)
expected_code = """
import math
def score(input):
var0 = math.exp(1.0)
return (var0) / (var0)
"""
interpreter = PythonInterpreter()
assert_code_equal(interpreter.interpret(expr), expected_code)
def test_exp_fallback_expr():
expr = ast.ExpExpr(ast.NumVal(2.0))
interpreter = PythonInterpreter()
interpreter.exponent_function_name = NotImplemented
expected_code = """
import math
def score(input):
return math.pow(2.718281828459045, 2.0)
"""
assert_code_equal(interpreter.interpret(expr), expected_code)
def test_deep_expression():
expr = ast.NumVal(1)
for _ in range(120):
expr = ast.BinNumExpr(expr, ast.NumVal(1), ast.BinNumOpType.ADD)
interpreter = PythonInterpreter()
result_code = interpreter.interpret(expr)
result_code += """
result = score(None)
"""
scope = {}
exec(result_code, scope)
assert scope["result"] == 121
def test_if_expr():
expr = ast.IfExpr(
ast.CompExpr(ast.NumVal(1), ast.FeatureRef(0), ast.CompOpType.EQ),
ast.NumVal(2), ast.NumVal(3))
expected_code = """
def score(input):
if (1.0) == (input[0]):
var0 = 2.0
else:
var0 = 3.0
return var0
"""
interpreter = PythonInterpreter()
assert_code_equal(interpreter.interpret(expr), expected_code)
def test_sigmoid_expr():
expr = ast.SigmoidExpr(ast.NumVal(2.0))
expected_code = """
import math
def sigmoid(x):
if x < 0.0:
z = math.exp(x)
return z / (1.0 + z)
return 1.0 / (1.0 + math.exp(-x))
def score(input):
return sigmoid(2.0)
"""
interpreter = PythonInterpreter()
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)
expected_code = """
def add_vectors(v1, v2):
return [sum(i) for i in zip(v1, v2)]
def mul_vector_number(v1, num):
return [i * num for i in v1]
def score(input):
return mul_vector_number([1.0, 2.0], 1.0)
"""
interpreter = PythonInterpreter()
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 = """
def score(input):
if (1.0) == (1.0):
var0 = [1.0, 2.0]
else:
var0 = [3.0, 4.0]
return var0
"""
interpreter = PythonInterpreter()
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
def test_atan_fallback_expr():
expr = ast.AtanExpr(ast.NumVal(2.0))
interpreter = PythonInterpreter()
interpreter.atan_function_name = NotImplemented
expected_code = (
"""
def score(input):
var1 = 2.0
var2 = abs(var1)
if (var2) > (2.414213562373095):
var0 = (1.0) / (var2)
else:
if (var2) > (0.66):
var0 = ((var2) - (1.0)) / ((var2) + (1.0))
else:
var0 = var2
var3 = var0
var4 = (var3) * (var3)
if (var2) > (2.414213562373095):
var5 = -1.0
else:
var5 = 1.0
if (var2) <= (0.66):
var6 = 0.0
else:
if (var2) > (2.414213562373095):
var6 = 1.5707963267948968
else:
var6 = 0.7853981633974484
if (var1) < (0.0):
var7 = -1.0
else:
var7 = 1.0
return (((((var3) * ((var4) * ((((var4) * (((var4) * (((var4) * """
"""(((var4) * (-0.8750608600031904)) - (16.157537187333652))) - """
"""(75.00855792314705))) - (122.88666844901361))) - """
"""(64.85021904942025)) / ((194.5506571482614) + ((var4) * """
"""((485.3903996359137) + ((var4) * ((432.88106049129027) + """
"""((var4) * ((165.02700983169885) + ((var4) * """
"""((24.858464901423062) + (var4))))))))))))) + (var3)) * """
"""(var5)) + (var6)) * (var7)""")
assert_code_equal(interpreter.interpret(expr), expected_code)
def test_softmax_expr():
expr = ast.SoftmaxExpr([ast.NumVal(2.0), ast.NumVal(3.0)])
expected_code = """
import math
def softmax(x):
m = max(x)
exps = [math.exp(i - m) for i in x]
s = sum(exps)
for idx, _ in enumerate(exps):
exps[idx] /= s
return exps
def score(input):
return softmax([2.0, 3.0])
"""
interpreter = PythonInterpreter()
assert_code_equal(interpreter.interpret(expr), expected_code)
def test_bin_vector_expr():
expr = ast.BinVectorExpr(
ast.VectorVal([ast.NumVal(1), ast.NumVal(2)]),
ast.VectorVal([ast.NumVal(3), ast.NumVal(4)]),
ast.BinNumOpType.ADD)
interpreter = PythonInterpreter()
expected_code = """
def add_vectors(v1, v2):
return [sum(i) for i in zip(v1, v2)]
def mul_vector_number(v1, num):
return [i * num for i in v1]
def score(input):
return add_vectors([1.0, 2.0], [3.0, 4.0])
"""
utils.assert_code_equal(interpreter.interpret(expr), expected_code)
def test_log1p_fallback_expr():
expr = ast.Log1pExpr(ast.NumVal(2.0))
interpreter = PythonInterpreter()
interpreter.log1p_function_name = NotImplemented
expected_code = """
import math
def score(input):
var1 = 2.0
var2 = (1.0) + (var1)
var3 = (var2) - (1.0)
if (var3) == (0.0):
var0 = var1
else:
var0 = ((var1) * (math.log(var2))) / (var3)
return var0
"""
assert_code_equal(interpreter.interpret(expr), expected_code)
def test_tanh_fallback_expr():
expr = ast.TanhExpr(ast.NumVal(2.0))
interpreter = PythonInterpreter()
interpreter.tanh_function_name = NotImplemented
expected_code = """
import math
def score(input):
var1 = 2.0
if (var1) > (44.0):
var0 = 1.0
else:
if (var1) < (-44.0):
var0 = -1.0
else:
var0 = (1.0) - ((2.0) / ((math.exp((2.0) * (var1))) + (1.0)))
return var0
"""
assert_code_equal(interpreter.interpret(expr), expected_code)