Web3.py: Web3.py v4.0.0b9: Python 3.6.4 fresh install error

Created on 21 Feb 2018 · 10Comments · Source: ethereum/web3.py

Setup

Version: 4.0.0b9
Python: 3.6.4
OS: linux
stacktrace:

$ pip install web3>=4.0.0b9
...
$ python -m web3
Traceback (most recent call last):
  File "/home/bryant/.pyenv/versions/3.6.4/lib/python3.6/runpy.py", line 183, in _run_module_as_main
    mod_name, mod_spec, code = _get_module_details(mod_name, _Error)
  File "/home/bryant/.pyenv/versions/3.6.4/lib/python3.6/runpy.py", line 142, in _get_module_details
    return _get_module_details(pkg_main_name, error)
  File "/home/bryant/.pyenv/versions/3.6.4/lib/python3.6/runpy.py", line 109, in _get_module_details
    __import__(pkg_name)
  File "/home/bryant/.pyenv/versions/test/lib/python3.6/site-packages/web3/__init__.py", line 8, in <module>
    from web3.main import Web3  # noqa: E402
  File "/home/bryant/.pyenv/versions/test/lib/python3.6/site-packages/web3/main.py", line 16, in <module>
    from web3.eth import Eth
  File "/home/bryant/.pyenv/versions/test/lib/python3.6/site-packages/web3/eth.py", line 16, in <module>
    from web3.contract import (
  File "/home/bryant/.pyenv/versions/test/lib/python3.6/site-packages/web3/contract.py", line 7, in <module>
    from eth_abi import (
  File "/home/bryant/.pyenv/versions/test/lib/python3.6/site-packages/eth_abi/__init__.py", line 3, in <module>
    from eth_abi.abi import (  # NOQA
  File "/home/bryant/.pyenv/versions/test/lib/python3.6/site-packages/eth_abi/abi.py", line 19, in <module>
    from eth_abi.encoding import (
  File "/home/bryant/.pyenv/versions/test/lib/python3.6/site-packages/eth_abi/encoding.py", line 27, in <module>
    from eth_abi.utils.padding import (
  File "/home/bryant/.pyenv/versions/test/lib/python3.6/site-packages/eth_abi/utils/padding.py", line 3, in <module>
    from eth_utils import (
ImportError: cannot import name 'pad_left'

What was wrong?

Installed the beta from scratch, looks like eth-utils 1.0.0b1 no longer implements pad_left, pad_right?

How can it be fixed?

Not sure, something is off with eth-abi, eth-utils

Source

fubuloubu

👍1

Most helpful comment

Confirmed Beta 10 fixes

fubuloubu on 22 Feb 2018

🎉2

All 10 comments

Looks like this captures the problem: https://github.com/ethereum/eth-abi/pull/28

fubuloubu on 21 Feb 2018

It's the eth-utils beta 2 that dropped pad_*. So as a temporary workaround, you can force eth-utils to beta 1. We'll get all the eth-* libraries that use pad_* cleaned up soon (certainly by tomorrow).

carver on 21 Feb 2018

👍1

Confirmed this solves the problem:

$ pip install eth-utils>=1.0.0b1,<1.0.0b2 # Temporary work-around
$ pip install web3>=4.0.0b9
$ python -m web3
# No ImportError now!

fubuloubu on 21 Feb 2018

👍1

Doesn't work for me, I have python3 and pip3 though

phahulin on 21 Feb 2018

My pip and python are pip3 and python3. I use pyenv to manage python virtualenvs

fubuloubu on 21 Feb 2018

Beta 10 was just released. It works for me in a fresh venv, with no caching. Closing as fixed, but please comment/reopen if you are still experiencing issues.

carver on 22 Feb 2018

Confirmed Beta 10 fixes

fubuloubu on 22 Feb 2018

🎉2

Can anyone help me out here? Just tried to install this with pipenv with pipenv install web3 but getting the pad_left error

lightninglu10 on 28 Feb 2018

Nevermind.. reinstalled it and now working.

lightninglu10 on 28 Feb 2018

Same here, was getting ImportError: cannot import name 'decode_abi' and ImportError: cannot import name 'collapse_type' so I uninstalled eth abi and web3

python3.6 -m pip uninstall web3

python3.6 -m pip uninstall eth-abi



md5-a1ae416f5a3ee0f3d4f1df181a4f3ca1



python3.6 -m pip install eth-abi --user



md5-2f7279d0f770aae45de2a800d877afdf



python3.6 -m pip install web3 --user

in that order.