Google-cloud-python: No module named 'google.api_core.client_options' while importing firestore

[umer7]

I am trying to use Firestore with Python. I have successfully installed the google-cloud-firestore. But when I am trying to import the library using from google.cloud import firestore. It is throwing me the error

No module named 'google.api_core.client_options'

Note: I am not using the virtualenv Is there any way i can resolve this

I am stuck at this for weeks, Thanks in advance.

[tseaver]

Please upgrade google-api-core in your environment, e.g.:

$ /path/to/pip install --upgrade google-api-core