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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 xdg_config_dir():
    '''
    Check xdg locations for config files
    '''
    xdg_config = os.getenv('XDG_CONFIG_HOME', os.path.expanduser('~/.config'))
    xdg_config_directory = os.path.join(xdg_config, 'salt')
    return xdg_config_directory