h5config 0.3

Conveniently save and load config-options from HDF5 and YAML files.

H5config

H5config is a Python package for conviniently saving and loading configuration classes from disk. After populating base configuration classes with parameters, h5config automatically generates HDF5 and YAML backends for saving and loading that class. Yes, all this information could go into a single database, but if you like the flexibility of having a bunch of individual files that you can peek into one at a time, this module is for you.

I wrote the module to support my experiment-control infrastructure, and one of the key goals was to easily embed control parameters in the saved data:

experiment.h5
|-- raw/
|   |-- thermocouple: [32757, 32731, 32796, 32789, 32809, ...]
|   `-- deflection: [29808, 29793, 29782, 29817, 29775, ...]
|-- timeseries-config/
|   |-- frequency: 0.1
|   |-- run-time: 100
|   |-- thermocouple-channel/
|   |   |-- conversion-coefficients: [-10.0, 0.000305180437934]
|   |   `-- conversion-origin: [0.0]
|   |-- deflection-channel/
|   |   |-- conversion-coefficients: [-10.0, 0.000305180437934]
|   |   `-- conversion-origin: [0.0]
|   `-- thermocouple-calibration: [25.08355e3, 7.860106e4]
`-- environment-config/
    |-- temperature: 20
    `-- timestamp: 1311851980.750180

Storing all of the calibration and conversion factors can get complicated quickly. h5config will keep you organized, and allow you to focus on defining the config options without getting bogged down in the bookkeeping.

As a side effect, h5config also provides some tools to support system- and user-wide configuration files. For example, the pypiezo package uses h5config to automatically detect and load the following config file:

$ cat ~/.config/pypiezo.yaml
log-level: debug
matplotlib: no

Installation

Packages

Gentoo

I’ve packaged h5config for Gentoo. You need layman and my wtk overlay. Install with:

# emerge -av app-portage/layman
# layman --add wtk
# emerge -av dev-python/h5config

Dependencies

If you’re installing by hand or packaging h5config for another distribution, you’ll need the following dependencies:

Package	Debian	Gentoo
H5Py	python-h5py	dev-python/h5py
Nose	python-nose	dev-python/nose
PyYAML	python-pyyaml	dev-python/pyyaml

Installing by hand

H5config is available as a Git repository:

$ git clone git://tremily.us/

See the homepage for details. To install the checkout, run the standard:

$ python setup.py install

Usage

See the module docstrings for simple examples.

Testing

Run internal unit tests with:

$ nosetests --with-doctest --doctest-tests h5config

Licence

This project is distributed under the GNU General Public License Version 3 or greater.

Author

W. Trevor King [e-mail]