Hello! I am having a particular problem with Prefe...
# ask-communityt
tkanas
05/12/2020, 4:28 PMHello! I am having a particular problem with Prefect flows. When I create an extremely simple flow, with a single task (can be anything, just the identity function is fine), but pass in a parameter that is a NamedTuple with more than one entry, it doesn't parse the keys of the NamedTuple correctly. Instead of expanding them like a dictionary, it treats them all as a single entity. I'm happy to provide example code if needed.
z
Zachary Hughes
05/12/2020, 4:35 PMHi @tkanas, a reproducible example would be fantastic!
t
tkanas
05/12/2020, 4:37 PM Copy code
@task
def fake_task(spec):
return spec
with Flow('bla') as flow:
param_1_specs = Parameter('param_1_specs')
res = fake_task(param_1_specs)
class Complex(NamedTuple):
r: int
i: int
param_values={'param_1_specs': Complex(r=1, i=1)}
flow_result = flow.run(**param_values)z
Zachary Hughes
05/12/2020, 4:38 PMThank you! Taking a look now.
Zachary Hughes
05/12/2020, 4:44 PMAfter some digging, it looks like this issue is on our radar. A couple of notes:
• as an immediate way to move forward, you should be able to use a dot dict instead of a NamedTuple
• we have an issue open for this at the link below. If you have any opinions about the correct solution or your use case, we'd love to hear them here.
https://github.com/PrefectHQ/prefect/issues/2118
t
tkanas
05/12/2020, 4:59 PMThank you!
z
Zachary Hughes
05/12/2020, 4:59 PMSure thing! Let us know if you have any more questions/issues. 🙂