Bigquery: Missing Entity Type when reading dataset.access_entries

[tanisharai]

When running the following code:

from google.cloud import bigquery
gbq_client = bigquery.Client(project='project-name')
dataset_ref = gbq_client.dataset(dataset_id='dataset1', project='project-name')
dataset = gbq_client.get_dataset(dataset_ref=dataset_ref)
print(len(dataset.access_entries))

the following error will happen about 25% of the time:

Traceback (most recent call last):
  File "iam.py", line 5, in <module>
    print(len(dataset.access_entries))
  File "/usr/local/lib/python3.7/site-packages/google/cloud/bigquery/dataset.py", line 376, in access_entries
    return [AccessEntry.from_api_repr(entry) for entry in entries]
  File "/usr/local/lib/python3.7/site-packages/google/cloud/bigquery/dataset.py", line 376, in <listcomp>
    return [AccessEntry.from_api_repr(entry) for entry in entries]
  File "/usr/local/lib/python3.7/site-packages/google/cloud/bigquery/dataset.py", line 183, in from_api_repr
    return cls(role, entity_type, entity_id)
  File "/usr/local/lib/python3.7/site-packages/google/cloud/bigquery/dataset.py", line 115, in __init__
    raise ValueError(message)
ValueError: Entity type 'iamMember' not among: domain, groupByEmail, specialGroup, userByEmail, view

It seems the Google API is returning a new 'iamMember' entity type that is not in the hard coded list of allowed entity types in dataset.py

[cmc333333]

We're seeing this too, and when we do the entity_id is something like:
deleted:user:name@example.com?uid=123456789012345678901

Is there a work around?

[cmc333333]

# Nasty monkeypatch to work around
# https://github.com/googleapis/google-cloud-python/issues/9963
AccessEntry.ENTITY_TYPES = frozenset(set(AccessEntry.ENTITY_TYPES) | {"iamMember"})

seems to work