19913d85-f662-4518-a9a1-7adc1793dfd4.png){kind=small}
Hi everyone! Is it possible to dagster not to skip...
# ask-communitya
Andrei Duralei
12/19/2022, 2:12 PMHi everyone! Is it possible to dagster not to skip op if some inputs are optional and not provided?
๐ค 1
Andrei Duralei
12/19/2022, 2:14 PMFor example:
Copy code
@op(out={"output1": Out(is_required=True), "output2": Out(is_required=False)})
def op1():
if something:
yield Output()
else:
yield Output()
yield Output()
@op
def op2(output1: str, output2: Optional[str] = None):
#do something
@graph
def my_graph():
output1, output2 = op1()
op2(output1, output2)Andrei Duralei
12/19/2022, 2:14 PMop2 will not trigger even if output2 is optional parameter for this op and not being returned from op1
a
Adam Ward
12/19/2022, 2:49 PMHave you tried setting the default value for
output2''a
Andrei Duralei
12/19/2022, 2:56 PMIt doesnโt work too (I mean empty string). It has default value None for output2 and output1 is returned by op1.
a
Adam Ward
12/19/2022, 3:01 PMI personally deal more in assets than ops. You may want to consider using an asset for
op2op2output2a
Andrei Duralei
12/19/2022, 3:12 PMActually, I need output1 or output2 from op1 to start processing op2. I think it not my case ๐
a
Adam Ward
12/19/2022, 3:16 PMOh ok. What if you passed the return value from op1 as a tuple with the second value defaulting to an empty string? This would ensure that op2 always receives the dependent value, triggering a run.
Copy code
@op(out={"output": Out(is_required=True)})
def op1():
if something:
yield (Output(), '')
else:
yield (Output(), Output())
@op
def op2(output: tuple):
#do somethingAdam Ward
12/19/2022, 3:17 PMFull disclosure: I cannot test this right now so I apologise if these suggestions miss the mark. Just brainstorming out loud with you here. ๐
a
Andrei Duralei
12/19/2022, 3:24 PMI think it should work. I was thinking about it as last solution, because it will require for me to check and skip ops between op1 and op2 by my self. This example is just to simplify my request.
a
Adam Ward
12/19/2022, 3:29 PMAh - It's never quite as simple as we hope, is it? ๐
๐
1
a
Andrei Duralei
12/19/2022, 3:29 PMFor sure!
a
Adam Ward
12/19/2022, 3:29 PMBest of luck! โ๏ธ
๐ 1