Skip to main content

YAML parser

Project description

YAML access on chained attribute names.


$ pip install yachain

Suppose we have:

# config
   name: developers
      - yum
      - gcc

With yachain we can access this as:

>>> import yachain

>>> c = yachain.Config().load("netw.cfg")
>>> print(c["network::gitserver::gateway"])
>>> print(c["network::gitserver::packages"])
['yum', 'gcc']

References to files / paths independent from environment

References to files and paths can be used relative and absolute. In case an attribute ends on path or file then the path can be prefixed automatically when operation from a virtual environment is detected. The works by default upper and lower case and can be overriden.

Using the prefix makes it possible to use the same config in different environments.

import yachain
import yaml
import sys
import os

# yaml config:
yc = """
  logfile: var/log/app.log
  textrules: var/
  database_path: var/app/db
  database_file: /var/app/db/db.txt
  database_name: db.txt

PREFIX = "/" if not hasattr(sys, 'real_prefix') else sys.prefix
# CONFIG_FILE = os.path.join(PREFIX, "etc/app/app.cfg")
config = yachain.Config(prefix=PREFIX, configdata=yaml.load(yc))

for A in ["logfile",
    k = "app::{}".format(A)
    print config[k]

When run from a virtual environment, this will give us:


So, as expected, the logfile and database_path got the PREFIX.

When run from a non-virtual environment, this will give us:


So, as expected, prefixed with “/”.

Project details

Download files

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

Source Distribution

yachain-0.1.4.tar.gz (5.2 kB view hashes)

Uploaded source

Built Distribution

yachain-0.1.4-py2.py3-none-any.whl (6.4 kB view hashes)

Uploaded py2 py3

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page