def test_when_function_executor_with_a_child_should_allow_chaining(self):
expression = FunctionExpression(lambda x: x)
child = FunctionExpression(lambda x: list(map(lambda t: t + 1, x)))
expression.append_child(child)
values = [1, 2, 3]
actual = expression.evaluate(values)
expected = [2, 3, 4]
self.assertEqual(expected, actual)
def test_when_function_executor_with_a_child_should_allow_chaining(self):
expression = FunctionExpression(lambda x: pd.DataFrame(x))
child = FunctionExpression(lambda x: x + 1)
expression.append_child(child)
values = Batch(pd.DataFrame([1, 2, 3]))
actual = expression.evaluate(values)
expected = Batch(pd.DataFrame([2, 3, 4]))
self.assertEqual(expected, actual)
def visitUdfFunction(self, ctx: evaql_parser.UdfFunctionContext):
udf_name = None
udf_args = None
if ctx.simpleId():
udf_name = self.visit(ctx.simpleId())
else:
LoggingManager().log('UDF function name missing.',
LoggingLevel.ERROR)
udf_args = self.visit(ctx.functionArgs())
func_expr = FunctionExpression(None, name=udf_name)
for arg in udf_args:
func_expr.append_child(arg)
return func_expr