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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 read_file(paths):
 """read config from path or list of paths :param str|list[str] paths: path or list of paths :return dict: loaded and merged config """


    if isinstance(paths, str):
        paths = [paths]

    re = {}
    for path in paths:
        cfg = yaml.load(open(path))
        merge(re, cfg)

    return re