[Python] No module named 'db_dtypes'

Running a small python code to create a pandas dataframe from Bigquery table results . When i run the code I see the below results. The db_dtypes is already installed , not sure what other dependencies i need to add. Any help is appreciated.

Here is the code

import pandas

from google.cloud import bigquery
from google.oauth2 import service_account

credentials = service_account.Credentials.from_service_account_file(
'/Users/kar/Downloads/data-4045ff698b4f.json')

project_id = 'data-platform'
client = bigquery.Client(credentials=credentials, project=project_id)



sql = """SELECT * FROM `data-platform.airbnb.raw_hosts` LIMIT 1"""
query_job = client.query(sql)
df = query_job.to_dataframe()


Error

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/Users/ka/PycharmProjects/pythonProject4/main.py", line 17, in <module>
df = query_job.to_dataframe()
File "/Users/ka/PycharmProjects/pythonProject4/venv/lib/python3.7/site-packages/google/cloud/bigquery/job/query.py", line 1689, in to_dataframe
geography_as_object=geography_as_object,
File "/Users/ka/PycharmProjects/pythonProject4/venv/lib/python3.7/site-packages/google/cloud/bigquery/table.py", line 1965, in to_dataframe
_pandas_helpers.verify_pandas_imports()
File "/Users/ka/PycharmProjects/pythonProject4/venv/lib/python3.7/site-packages/google/cloud/bigquery/_pandas_helpers.py", line 991, in verify_pandas_imports
raise ValueError(_NO_DB_TYPES_ERROR) from db_dtypes_import_exception
ValueError: Please install the 'db-dtypes' package to use this function.

Process finished with exit code 1

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