# Python Implementation of the Ethereum protocol
[](https://discord.gg/GHryRvPB84)
[](https://circleci.com/gh/ethereum/py-evm)
[](https://badge.fury.io/py/py-evm)
[](https://pypi.python.org/pypi/py-evm)
[](https://py-evm.readthedocs.io/en/latest/?badge=latest)
## Py-EVM
Py-EVM is an implementation of the Ethereum protocol in Python. It contains the low level
primitives for the original proof-of-work (POW), (formerly known as Ethereum 1.0) chain
as well as emerging support for the proof-of-stake (POS) (formerly known as Ethereum 2.0) spec.
### Goals
Py-EVM aims to eventually become the defacto Python implementation of the Ethereum protocol,
enabling a wide array of use cases for both public and private chains.
In particular Py-EVM aims to:
- be a reference implementation of the Ethereum POW and POS implementations in one of the most widely used and understood languages, Python.
- be easy to understand and modifiable
- have clear and simple APIs
- come with solid, friendly documentation
- deliver the low level primitives to build various clients on top (including *full* and *light* clients)
- be highly flexible to support both research as well as alternate use cases like private chains.
## Quickstart
```sh
python -m pip install py-evm
```
[Get started in 5 minutes](https://py-evm.readthedocs.io/en/latest/guides/building_an_app_that_uses_pyevm.html)
## Documentation
Check out the [documentation on our official website](https://py-evm.readthedocs.io/en/latest/)
## Developer Setup
If you would like to hack on py-evm, please check out the [Snake Charmers
Tactical Manual](https://github.com/ethereum/snake-charmers-tactical-manual)
for information on how we do:
- Testing
- Pull Requests
- Documentation
We use [pre-commit](https://pre-commit.com/) to maintain consistent code style. Once
installed, it will run automatically with every commit. You can also run it manually
with `make lint`. If you need to make a commit that skips the `pre-commit` checks, you
can do so with `git commit --no-verify`.
### Development Environment Setup
```sh
git clone git@github.com:ethereum/py-evm.git
cd py-evm
virtualenv -p python3 venv
. venv/bin/activate
python -m pip install -e ".[dev]"
pre-commit install
```
### Release setup
To release a new version:
```sh
make release bump=$$VERSION_PART_TO_BUMP$$
```
To issue the next version in line, specify which part to bump,
like `make release bump=minor` or `make release bump=devnum`. This is typically done from the
main branch, except when releasing a beta (in which case the beta is released from main,
and the previous stable branch is released from said branch).
## Want to help?
Want to file a bug, contribute some code, or improve documentation? Excellent! Read up on our
guidelines for [contributing](https://py-evm.readthedocs.io/en/latest/contributing.html) and then check out one of our issues that are labeled [Good First Issue](https://github.com/ethereum/py-evm/issues?q=is%3Aissue+is%3Aopen+label%3A%22Good+First+Issue%22).
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"description": "# Python Implementation of the Ethereum protocol\n\n[](https://discord.gg/GHryRvPB84)\n[](https://circleci.com/gh/ethereum/py-evm)\n[](https://badge.fury.io/py/py-evm)\n[](https://pypi.python.org/pypi/py-evm)\n[](https://py-evm.readthedocs.io/en/latest/?badge=latest)\n\n## Py-EVM\n\nPy-EVM is an implementation of the Ethereum protocol in Python. It contains the low level\nprimitives for the original proof-of-work (POW), (formerly known as Ethereum 1.0) chain\nas well as emerging support for the proof-of-stake (POS) (formerly known as Ethereum 2.0) spec.\n\n### Goals\n\nPy-EVM aims to eventually become the defacto Python implementation of the Ethereum protocol,\nenabling a wide array of use cases for both public and private chains.\n\nIn particular Py-EVM aims to:\n\n- be a reference implementation of the Ethereum POW and POS implementations in one of the most widely used and understood languages, Python.\n\n- be easy to understand and modifiable\n\n- have clear and simple APIs\n\n- come with solid, friendly documentation\n\n- deliver the low level primitives to build various clients on top (including *full* and *light* clients)\n\n- be highly flexible to support both research as well as alternate use cases like private chains.\n\n## Quickstart\n\n```sh\npython -m pip install py-evm\n```\n\n[Get started in 5 minutes](https://py-evm.readthedocs.io/en/latest/guides/building_an_app_that_uses_pyevm.html)\n\n## Documentation\n\nCheck out the [documentation on our official website](https://py-evm.readthedocs.io/en/latest/)\n\n## Developer Setup\n\nIf you would like to hack on py-evm, please check out the [Snake Charmers\nTactical Manual](https://github.com/ethereum/snake-charmers-tactical-manual)\nfor information on how we do:\n\n- Testing\n- Pull Requests\n- Documentation\n\nWe use [pre-commit](https://pre-commit.com/) to maintain consistent code style. Once\ninstalled, it will run automatically with every commit. You can also run it manually\nwith `make lint`. If you need to make a commit that skips the `pre-commit` checks, you\ncan do so with `git commit --no-verify`.\n\n### Development Environment Setup\n\n```sh\ngit clone git@github.com:ethereum/py-evm.git\ncd py-evm\nvirtualenv -p python3 venv\n. venv/bin/activate\npython -m pip install -e \".[dev]\"\npre-commit install\n```\n\n### Release setup\n\nTo release a new version:\n\n```sh\nmake release bump=$$VERSION_PART_TO_BUMP$$\n```\n\nTo issue the next version in line, specify which part to bump,\nlike `make release bump=minor` or `make release bump=devnum`. This is typically done from the\nmain branch, except when releasing a beta (in which case the beta is released from main,\nand the previous stable branch is released from said branch).\n\n## Want to help?\n\nWant to file a bug, contribute some code, or improve documentation? Excellent! Read up on our\nguidelines for [contributing](https://py-evm.readthedocs.io/en/latest/contributing.html) and then check out one of our issues that are labeled [Good First Issue](https://github.com/ethereum/py-evm/issues?q=is%3Aissue+is%3Aopen+label%3A%22Good+First+Issue%22).\n",
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