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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 fix_errors(config, validation):
 """Replace errors with their default values :param config: a validated ConfigObj to fix :type config: ConfigObj :param validation: the resuts of the validation :type validation: ConfigObj :returns: The altered config (does alter it in place though) :raises: None """

    for e in flatten_errors(config, validation):
        sections, key, err = e
        sec = config
        for section in sections:
            sec = sec[section]
        if key is not None:
            sec[key] = sec.default_values.get(key, sec[key])
        else:
            sec.walk(set_to_default)
    return config