Nested ingredients not in preset for ConfigScope

Here’s a bare-bones example. From what I read in the docs, both a and b should be available to c.

from sacred import Ingredient, Experiment

i1 = Ingredient('a')
i2 = Ingredient('b', ingredients=[i1])
ex = Experiment('c', ingredients=[i2])

@ex.config
def cfg(a, b):
    print(a, b)

@ex.automain
def main():
    print('asdfasdfasdf')

---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
/anaconda3/lib/python3.7/site-packages/sacred/experiment.py in _create_run(self, command_name, config_updates, named_configs, meta_info, options)
    455                          force=options.get(ForceOption.get_flag(), False),
    456                          log_level=options.get(LoglevelOption.get_flag(),
--> 457                                                None))
    458         run.meta_info['command'] = command_name
    459         run.meta_info['options'] = options

/anaconda3/lib/python3.7/site-packages/sacred/initialize.py in create_run(experiment, command_name, config_updates, named_configs, force, log_level)
    394     for scaffold in scaffolding.values():
    395         scaffold.gather_fallbacks()
--> 396         scaffold.set_up_config()
    397 
    398         # update global config

/anaconda3/lib/python3.7/site-packages/sacred/initialize.py in set_up_config(self)
    106             fixed=self.config_updates,
    107             preset=self.config,
--> 108             fallback=self.fallback)
    109 
    110         self.get_config_modifications()

/anaconda3/lib/python3.7/site-packages/sacred/config/utils.py in chain_evaluate_config_scopes(config_scopes, fixed, preset, fallback)
    104         cfg = config(fixed=fixed,
    105                      preset=final_config,
--> 106                      fallback=fallback)
    107         config_summaries.append(cfg)
    108         final_config.update(cfg)

/anaconda3/lib/python3.7/site-packages/sacred/config/config_scope.py in __call__(self, fixed, preset, fallback)
     67                 raise KeyError("'{}' not in preset for ConfigScope. "
     68                                "Available options are: {}"
---> 69                                .format(arg, available_entries))
     70             if arg in preset:
     71                 cfg_locals[arg] = preset[arg]

KeyError: "'a' not in preset for ConfigScope. Available options are: {'b', '_log'}"

[beasteers]

Ah understood. The nested ingredient docs are wrong then. They explicitly explain nested ingredients getting flattened so that should probably be changed at some point.

Nesting Ingredients

It is possible to use Ingredients in other Ingredients

data_ingredient = Ingredient('dataset', ingredients=[my_subingredient])

In the configuration of the Experiment there will be all the used Ingredients and sub-Ingredients.

[stale[bot]]

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