[bug] from google_cloud_pipeline_components import aiplatform results in TypeError: 'NoneType' object is not iterable

[A-Pot]

When I try to import aiplatform from google_cloud_pipeline_components, I get a TypeError, and the import fails.

What steps did you take

To reproduce the issue:

1. Create a new virtual environment (Python version 3.6.9):
   python3 -m virtualenv gcp_aip

2. Activate the environment:
   source gcp_aip/bin/activate

3. Install per instructions:
   pip install -U google-cloud-pipeline-components

4. Start a new Python session and try to import aiplatform:
   python3 -c 'from google_cloud_pipeline_components import aiplatform'

What happened:

I get a TypeError, specifically the following:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/ubuntu/.env/gcp_aip/lib/python3.6/site-packages/google_cloud_pipeline_components/aiplatform/__init__.py", line 68, in <module>
    aiplatform_sdk.ImageDataset.export_data,
  File "/home/ubuntu/.env/gcp_aip/lib/python3.6/site-packages/google_cloud_pipeline_components/aiplatform/utils.py", line 465, in convert_method_to_component
    output_type
TypeError: 'NoneType' object is not iterable

What did you expect to happen:

I expected the import to succeed.

Environment:

Ubuntu 18.04 / Python 3.6.9.

I suspect this may have something to do with the version of Python. The error above happens with Python 3.6.9. I tried the same process with Python 3.8.5, and I did not get the above error.

Labels

/area components

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[Bobgy]

/assign @sasha-gitg @SinaChavoshi

[ckchow]

I managed to work around this by using python 3.9.6. No idea why that would affect this but it appears to help.

[SinaChavoshi]

This issue was fixed by googleapis/python-aiplatform#494