Skip to main content

Module to create layers of dependencies

Project description

A simple module for creating layers of dependencies.

Installation

Just use pip!:

$ pip install layerz

Usage

from layerz import Layers

dep1 = type("dep1", (object, ), {"dependencies": lambda s, all_deps: []})()
dep2 = type("dep2", (object, ), {"dependencies": lambda s, all_deps: ["dep3"]})()
dep3 = type("dep3", (object, ), {"dependencies": lambda s, all_deps: ["dep1"]})()
dep4 = type("dep4", (object, ), {"dependencies": lambda s, all_deps: ["dep3"]})()
dep5 = type("dep1", (object, ), {"dependencies": lambda s, all_deps: ["dep4", "dep2"]})()

layers = Layers({"dep1": dep1, "dep2": dep2, "dep3": dep3, "dep4": dep4, "dep5": dep5})
layers.add_to_layers("dep5")
for layer in layers.layered:
    # might get something like
    # [("dep5", dep5)]
    # [("dep4", dep4), ("dep2", dep2)]
    # [("dep3", dep3)]
    # [("dep1", dep1)]

When we create the layers, it will do a depth first addition of all dependencies and only add a dep to a layer that occurs after all it’s dependencies.

Cyclic dependencies will be complained about.

Tests

Install locally:

$ pip install -e .
$ pip install -e ".[tests]"

And then use the helper script:

$ ./test.sh

Project details


Release history Release notifications

This version
History Node

0.5

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Filename, size & hash SHA256 hash help File type Python version Upload date
layerz-0.5.tar.gz (2.0 kB) Copy SHA256 hash SHA256 Source None Jun 5, 2016

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN DigiCert DigiCert EV certificate StatusPage StatusPage Status page