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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def parse_model_group_list(path, groups):
 """Parse a structured list of model groups as obtained from a YAML file Yields reaction IDs. Path can be given as a string or a context. """


    context = FilePathContext(path)
    for model_group in groups:
        if 'include' in model_group:
            include_context = context.resolve(model_group['include'])
            for reaction_id in parse_model_file(include_context):
                yield reaction_id
        else:
            for reaction_id in parse_model_group(context, model_group):
                yield reaction_id