def __init__()

in src/composer/composer.py [0:0]

• 35 lines of code
• 22 McCabe index (conditional complexity)

    def __init__(self, composition):
        '''  construct a composition object with the specified fields '''
        # shallow copy of obj attributes
        items = composition.items() if isinstance(composition, dict) else composition.__dict__.items() if isinstance(composition, Composition) else None
        if items is None:
            raise ComposerError('Invalid argument', composition)
        for k, v in items:
            setattr(self, k, v)

        combinator = composition['.combinator']()

        if 'args' in combinator:
            for arg in combinator['args']:
                optional = arg.get('optional', False)
                if arg['name'] not in composition and optional and 'type' in arg:
                    continue
                if 'type' not in arg:
                    try:
                        value = composition.get(arg['name'], None if optional else undefined)
                        setattr(self, arg['name'], composer.task(value))
                    except Exception:
                        raise ComposerError('Invalid argument "'+arg['name']+'" in "'+composition['type']+' combinator"', value)
                elif arg['type'] == 'name':
                    try:
                        setattr(self, arg['name'], parse_action_name(composition.get(arg['name'])))
                    except ComposerError as ce:
                        raise ComposerError(ce.message + ' in "'+composition['type']+' combinator"', composition.get(arg['name']))
                elif arg['type'] == 'value':
                    if callable(composition.get(arg['name'])) or arg['name'] not in composition:
                        raise ComposerError('Invalid argument "' + arg['name']+'" in "'+ composition['type']+' combinator"', composition.get(arg['name']))
                elif arg['type'] == 'object':
                    if not isinstance(composition.get(arg['name']), dict):
                        raise ComposerError('Invalid argument "' + arg['name']+'" in "'+ composition['type']+' combinator"', composition.get(arg['name']))
                else:
                    if type(composition.get(arg['name'])).__name__ != arg['type']:
                        raise ComposerError('Invalid argument "' + arg['name']+'" in "'+ composition['type']+' combinator"', composition.get(arg['name']))

        if 'components' in combinator:
            self.components = list(map(composer.task, composition.get('components', [])))