Package logilab :: Package common :: Module configuration
[frames] | no frames]

Module configuration

source code

Classes to handle advanced configuration in simple to complex applications.

Allows to load the configuration from a file or from command line
options, to generate a sample configuration file or to display
program's usage. Fills the gap between optik/optparse and ConfigParser
by adding data types (which are also available as a standalone optik
extension in the `optik_ext` module).


Quick start: simplest usage
---------------------------

.. python ::

  >>> import sys
  >>> from logilab.common.configuration import Configuration
  >>> options = [('dothis', {'type':'yn', 'default': True, 'metavar': '<y or n>'}),
  ...            ('value', {'type': 'string', 'metavar': '<string>'}),
  ...            ('multiple', {'type': 'csv', 'default': ('yop',),
  ...                          'metavar': '<comma separated values>',
  ...                          'help': 'you can also document the option'}),
  ...            ('number', {'type': 'int', 'default':2, 'metavar':'<int>'}),
  ...           ]
  >>> config = Configuration(options=options, name='My config')
  >>> print config['dothis']
  True
  >>> print config['value']
  None
  >>> print config['multiple']
  ('yop',)
  >>> print config['number']
  2
  >>> print config.help()
  Usage:  [options]

  Options:
    -h, --help            show this help message and exit
    --dothis=<y or n>
    --value=<string>
    --multiple=<comma separated values>
                          you can also document the option [current: none]
    --number=<int>

  >>> f = open('myconfig.ini', 'w')
  >>> f.write('''[MY CONFIG]
  ... number = 3
  ... dothis = no
  ... multiple = 1,2,3
  ... ''')
  >>> f.close()
  >>> config.load_file_configuration('myconfig.ini')
  >>> print config['dothis']
  False
  >>> print config['value']
  None
  >>> print config['multiple']
  ['1', '2', '3']
  >>> print config['number']
  3
  >>> sys.argv = ['mon prog', '--value', 'bacon', '--multiple', '4,5,6',
  ...             'nonoptionargument']
  >>> print config.load_command_line_configuration()
  ['nonoptionargument']
  >>> print config['value']
  bacon
  >>> config.generate_config()
  # class for simple configurations which don't need the
  # manager / providers model and prefer delegation to inheritance
  #
  # configuration values are accessible through a dict like interface
  #
  [MY CONFIG]

  dothis=no

  value=bacon

  # you can also document the option
  multiple=4,5,6

  number=3
  >>>

Classes
  OptionsManagerMixIn
MixIn to handle a configuration from both a configuration file and...
  OptionsProviderMixIn
Mixin to provide options to an OptionsManager
  ConfigurationMixIn
basic mixin for simple configurations which don't need the...
  Configuration
class for simple configurations which don't need the manager / providers model and prefer delegation to inheritance
  OptionsManager2ConfigurationAdapter
Adapt an option manager to behave like a...