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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 render_parse_load(raw_config, environment=None, validate=True):
 """Encapsulates the render -> parse -> validate -> load process. Args: raw_config (str):
 the raw stacker configuration string. environment (dict, optional):
 any environment values that should be passed to the config validate (bool):
 if provided, the config is validated before being loaded. Returns: :class:`Config`: the parsed stacker config. """


    pre_rendered = render(raw_config, environment)

    rendered = process_remote_sources(pre_rendered, environment)

    config = parse(rendered)

    # For backwards compatibility, if the config doesn't specify a namespace,
    # we fall back to fetching it from the environment, if provided.
    if config.namespace is None:
        namespace = environment.get("namespace")
        if namespace:
            logger.warn("DEPRECATION WARNING: specifying namespace in the "
                        "environment is deprecated. See "
                        "https://stacker.readthedocs.io/en/latest/config.html"
                        "#namespace "
                        "for more info.")
            config.namespace = namespace

    if validate:
        config.validate()

    return load(config)