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Lazy config evaluation #64

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elijahbenizzy
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[Short description explaining the high-level reason for the pull request]

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Python

  • python 3.6
  • python 3.7

@elijahbenizzy elijahbenizzy marked this pull request as draft February 7, 2022 03:51
This is more generic, and allows us to support lazily evaluated
configurations if needed.
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Need to add tests/figure out what to test. Hopefully this demonstrates the issue. IMO chainmap is actually better here -- supporting a lazyconfig is reasonable. That said, I'd prefer the simplicity with a dictionary.

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Pros of this:

  1. It allows lazily evaluated configs
  2. Its idiomatic -- types are only as constricted as they need to be (E.G. why does config have to be a dict?)
  3. It solves the problem a customer has

Cons of this:

  1. We can do less with the config/inputs - E.G. if we want to store them somewhere or print them out we'll be running up against the same problem.
  2. Added complexity for a specific use-case

Comment on lines +316 to +317
computed: Mapping[str, Any] = None,
overrides: Mapping[str, Any] = None):
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do these need to change?

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No, but I figured it would be nice to stay consistent.

@@ -379,7 +380,7 @@ def combine_config_and_inputs(config: Dict[str, Any], inputs: Dict[str, Any]) ->
duplicated_inputs = [key for key in inputs if key in config]
if len(duplicated_inputs) > 0:
raise ValueError(f'The following inputs are present in both config and inputs. They must be mutually disjoint. {duplicated_inputs}')
return {**config, **inputs}
return collections.ChainMap(config, inputs)
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does the unit test need to change to enforce chain map's way of not evaluating things?

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Yeah, if the contract is that we don't evaluate the driver then we want to test that its not evaluated. That said, I don't really like that as a contract, and it feels limiting later on, so let's think through.

gitbook-com bot pushed a commit that referenced this pull request Feb 21, 2022
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2 participants