README.md

Web3.py

A Python implementation of web3.js

• Python 2.7, 3.4, 3.5 support

Read more in the documentation on ReadTheDocs. View the change log on Github.

Developer setup

If you would like to hack on web3.py, set up your dev environment with:

sudo apt-get install libssl-dev
# ^ This is for Debian-like systems. TODO: Add more platforms

git clone git@github.com:pipermerriam/web3.py.git
cd web3.py
virtualenv venv
. venv/bin/activate
pip install -r requirements-dev.txt
pip install -e .

For different environments, you can set up multiple virtualenvs, like:

Python 2

virtualenv -p python2 venvpy2
. venvpy2/bin/activate
pip install -r requirements-dev.txt
pip install -e .

Docs

virtualenv venvdocs
. venvdocs/bin/activate
pip install -r requirements-dev.txt
pip install -e .

Testing Setup

During development, you might like to have tests run on every file save.

Show flake8 errors on file change:

# Test flake8
when-changed -r web3/ tests/ -c "clear; git diff HEAD^ | flake8 --diff"

You can use pytest-watch, running one for every python environment:

pip install pytest-watch

cd venv
ptw --onfail "notify-send -t 5000 'Test failure ⚠⚠⚠⚠⚠' 'python 3 test on web3.py failed'" ../tests ../web3

#in a new console
cd venvpy2
ptw --onfail "notify-send -t 5000 'Test failure ⚠⚠⚠⚠⚠' 'python 2 test on web3.py failed'" ../tests ../web3

Or, you can run multi-process tests in one command, but without color:

# in the project root:
py.test --numprocesses=4 --looponfail --maxfail=1
# the same thing, succinctly:
pytest -n 4 -f --maxfail=1

Release setup

For Debian-like systems:

apt install pandoc

TODO other release instructions