Cannot import module: ModuleNotFoundError: No module named 'pytz'

[bobidle]

Noticed an issue with module version 1.28.3, if that module version is still supported please fix the following issue. Thank you very much.

Environment details

• OS type and version: Debian Linux 11.7
• Python version: 3.9.2
• pip version: pip 20.3.4 from /usr/lib/python3/dist-packages/pip (python 3.9)
• google-cloud-bigquery version: ` 1.28.3

Steps to reproduce

1. install google-cloud-bigquery==1.28.3 via pip
2. run example code

Code example

from google.cloud import bigquery

Stack trace

  File "/home/user/bigquery/test.py", line 1, in <module>
    from google.cloud import bigquery
  File "/home/user/.local/lib/python3.9/site-packages/google/cloud/bigquery/__init__.py", line 35, in <module>
    from google.cloud.bigquery.client import Client
  File "/home/user/.local/lib/python3.9/site-packages/google/cloud/bigquery/client.py", line 62, in <module>
    from google.cloud.bigquery.dataset import Dataset
  File "/home/user/.local/lib/python3.9/site-packages/google/cloud/bigquery/dataset.py", line 27, in <module>
    from google.cloud.bigquery.table import TableReference
  File "/home/user/.local/lib/python3.9/site-packages/google/cloud/bigquery/table.py", line 24, in <module>
    import pytz
ModuleNotFoundError: No module named 'pytz'

Related issue: #885

[meredithslota]

Hi there — thanks for reporting this! As you noted, this is a duplicate of this issue: #885 We do keep a v1 branch alive for high-priority fixes but since we didn't backport this at the time, it may not qualify.

[chalmerlowe]

A while back, api-core dropped the pytz dependency which our older python-bigquery library implicitly depends on.

A workaround is to install pytz manually if using an older BigQuery client version.
Based on manpower and priorities, I don't see us working on this right away.

A change related to this was made in a 2.x version of python-bigquery (linking here for posterity):

I recommend closing this.