snakefile.py

from snake import *


@task
@depends_on('virtualenv.create', 'install')
def init():
    pass


@task
def install():
    sh('pip install -e .')


with namespace('virtualenv'):

    @task
    def create():
        sh('virtualenv --no-site-packages --distribute .')

    @task
    def destroy():
        sh('rm -rf bin include lib src')