Mac, pip install tronapi, ImportError: No module named eth_account

[tigermumu]

After installed tronapi by sudo pip install tronapi, and run python account.py in examples documents, showing error:

Traceback (most recent call last):
  File "test.py", line 2, in <module>
    from tronapi import Tron
  File "/Volumes/D/coins/tron/tron-robot/tronapi/__init__.py", line 11, in <module>
    from eth_account import Account  # noqa: E402
ImportError: No module named eth_account

I checked installation logs, shows
Requirement already satisfied: eth-account<0.4.0,>=0.2.1 in /usr/local/lib/python3.7/site-packages (from tronapi) (0.3.0)
What should I do ?
Thank you

[serderovsh]

https://travis-ci.com/iexbase/tron-api-python/jobs/242314621

We checked there are no errors.
Everything is installed

[tigermumu]

Ok, I checked again