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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 _get_config_dirs():
 """Return a list of directories where config files may be located. The following directories are returned:: $XDG_CONFIG_HOME/rapport/ ($XDG_CONFIG_HOME defaults to ~/.config) /etc/rapport/ """

    config_dirs = [
        USER_CONFIG_DIR,
        os.path.join("/", "etc", "rapport"),
        os.path.abspath(os.path.join("rapport", "config"))
    ]
    return config_dirs