ModuleNotFoundError: No module named 'sha3'

When trying to run `tutorial-2/address.py`, I get:
```
Traceback (most recent call last):
  File "/home/igor/code/tutorial-2/address.py", line 4, in <module>
    import utils
  File "../libraries/utils.py", line 3, in <module>
    import sha3
ModuleNotFoundError: No module named 'sha3'
```