Give clear error message if algo not found

[bouthilx]

This is very unclear, and terrifying for a new user!

Traceback (most recent call last):
  File “/media/martin/the_milano/anaconda3/bin/orion”, line 11, in <module>
    sys.exit(main())
  File “/media/martin/the_milano/anaconda3/lib/python3.7/site-packages/orion/core/cli/__init__.py”, line 39, in main
    orion_parser.execute(argv)
  File “/media/martin/the_milano/anaconda3/lib/python3.7/site-packages/orion/core/cli/base.py”, line 71, in execute
    function(args)
  File “/media/martin/the_milano/anaconda3/lib/python3.7/site-packages/orion/core/cli/huo\fv nt.py”, line 65, in main
    experiment = EVCBuilder().build_from(args)
  File “/media/martin/the_milano/anaconda3/lib/python3.7/site-packages/orion/core/io/evc_builder.py”, line 51, in build_from
    experiment = ExperimentBuilder().build_from(cmdargs)
  File “/media/martin/the_milano/anaconda3/lib/python3.7/site-packages/orion/core/io/experiment_builder.py”, line 239, in build_from
    experiment = self.build_from_config(full_config)
  File “/media/martin/the_milano/anaconda3/lib/python3.7/site-packages/orion/core/io/experiment_builder.py”, line 270, in build_from_config
    experiment.configure(config)
  File “/media/martin/the_milano/anaconda3/lib/python3.7/site-packages/orion/core/worker/experiment.py”, line 457, in configure
    experiment._instantiate_config(config)
  File “/media/martin/the_milano/anaconda3/lib/python3.7/site-packages/orion/core/worker/experiment.py”, line 614, in _instantiate_config
    self.algorithms = PrimaryAlgo(space, self.algorithms)
  File “/media/martin/the_milano/anaconda3/lib/python3.7/site-packages/orion/core/worker/primary_algo.py”, line 40, in __init__
    requirements = self.algorithm.requires
AttributeError: ‘str’ object has no attribute ‘requires’

[bouthilx]

This is from an old Trello card. Should verify if it is still an issue.

[Simnol22]

This is not an Issue anymore. When algo is not found we have an error like this :

NotImplementedError: Could not find implementation of BaseAlgorithm, type = 'badalgo' Currently, there is an implementation for types: ['evolutiones', 'asha', 'random', 'hyperband', 'tpe']

We can now close this Issue.

[bouthilx]

Great! Thanks a lot for verifying this! :)