web3.py - AttributeError: 'Eth' object has no attribute 'get_block'

Question

So... I'm probably being super dumb - but I started using web3.py in a jupyter notebook and it connects to the node just fine... but I can't seem to use any .eth methods as it throws a: AttributeError: 'Eth' object has no attribute 'get_block'

Versions:

• w3.api '5.0.0'
• Python: 3.9.1
• OS: osx

from web3 import Web3
w3 = Web3(Web3.HTTPProvider('http://fullnode.dappnode:8545'))

w3.isConnected() returns True, and I can use w3.api and w3.clientVersion just fine... but when I try to do something eth related I get:

>>> w3.eth.get_block('latest')
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-8-70b856a4c410> in <module>
----> 1 w3.eth.get_block('latest')

AttributeError: 'Eth' object has no attribute 'get_block'

or

w3.eth.chain_id
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-23-9e974a6bb0e9> in <module>
----> 1 w3.eth.chain_id

AttributeError: 'Eth' object has no attribute 'chain_id'

Answer 1

Had the same problem. Apparently we installed an older version of Web3 that used to have the method getBlock, now deprecated in favor of the get_block method.

However I don't know how to upgrade to the latest version, tried using pip install Web3 --upgrade but nothing changes.

Answer 2

It all came down to a virtualenv mess. For some reason it was using a globally installed web3 version (5.0.0) instead of the documented one that I was following the quickstart for (latest). Nuking the virtualenv and starting from scratch with the new version worked for me :)

Answer 3

In web3 v6, all camelCase methods were updated to use snake_case. You can check which version of web3 you are using with the following command:

python3 -m pip show web3

If you see a version < 6.0.0, you will need to upgrade web3.

python3 -m pip install web3 -U