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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 prioritized_iter(cls, flag_val, env_val, config_val, config_default_val, hardcoded_val, default):
 """Yield the non-None values from highest-ranked to lowest, wrapped in RankedValue instances."""

    if flag_val is not None:
      yield RankedValue(cls.FLAG, flag_val)
    if env_val is not None:
      yield RankedValue(cls.ENVIRONMENT, env_val)
    if config_val is not None:
      yield RankedValue(cls.CONFIG, config_val)
    if config_default_val is not None:
      yield RankedValue(cls.CONFIG_DEFAULT, config_default_val)
    if hardcoded_val is not None:
      yield RankedValue(cls.HARDCODED, hardcoded_val)
    yield RankedValue(cls.NONE, default)