mrun failure with 'dict' object has no attribute 'connect'

[rkingsbury]

Using mrun as described in the docs can fail if the Builder is not serialized first.

If I instantiate a Builder inside a jupyter notebook and assign it to the __builder__ variable:

__builder__ = MaterialsBuilder(my_store, target_store, query={"tags":"my_favorite_tag"})

and then execute mrun test_builder.ipynb, I get

Traceback (most recent call last):
  File "/Users/ryan/miniconda3/envs/mp2/bin/mrun", line 8, in <module>
    sys.exit(run())
  File "/Users/ryan/miniconda3/envs/mp2/lib/python3.8/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/Users/ryan/miniconda3/envs/mp2/lib/python3.8/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/Users/ryan/miniconda3/envs/mp2/lib/python3.8/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/Users/ryan/miniconda3/envs/mp2/lib/python3.8/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/Users/ryan/miniconda3/envs/mp2/lib/python3.8/site-packages/maggma/cli/__init__.py", line 80, in run
    asyncio.run(multi(builder, num_workers))
  File "/Users/ryan/miniconda3/envs/mp2/lib/python3.8/asyncio/runners.py", line 43, in run
    return loop.run_until_complete(main)
  File "/Users/ryan/miniconda3/envs/mp2/lib/python3.8/asyncio/base_events.py", line 612, in run_until_complete
    return future.result()
  File "/Users/ryan/miniconda3/envs/mp2/lib/python3.8/site-packages/maggma/cli/multiprocessing.py", line 158, in multi
    builder.connect()
AttributeError: 'dict' object has no attribute 'connect'

However, if I serialize the builder first:

dumpfn(__builder__, 'builder_test.json')

and then run mrun builder_test.json, all works as expected.

Expected behavior

mrun should work when called on a python file or jupyter notebook directly, even if the builder defined in that file has not been serialized.

[shyamd]

So I wasn't able to get it to fail in the same way, although it did fail for me. I had to remove the matplotlib lines otherwise it kept trying to initialize some weird GUI elements. Can you try that and see what happens?

[rkingsbury]

Solved by reinstalling the latest version. Closing.