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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 rime_solver_cfg(**kwargs):
 """ Produces a SolverConfiguration object, inherited from a simple python dict, and containing the options required to configure the RIME Solver. Keyword arguments Any keyword arguments are inserted into the returned dict. Returns ------- A SolverConfiguration object. """

    from configuration import (load_config, config_validator,
        raise_validator_errors)

    def _merge_copy(d1, d2):
        return { k: _merge_copy(d1[k], d2[k]) if k in d1
                                                and isinstance(d1[k], dict)
                                                and isinstance(d2[k], dict)
                                            else d2[k] for k in d2 }

    try:
        cfg_file = kwargs.pop('cfg_file')
    except KeyError as e:
        slvr_cfg = kwargs
    else:
        cfg = load_config(cfg_file)
        slvr_cfg = _merge_copy(cfg, kwargs)

    # Validate the configuration, raising any errors
    validator = config_validator()
    validator.validate(slvr_cfg)
    raise_validator_errors(validator)

    return validator.document