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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 validate_dict(d):
 """Validate a dictionary Parameters d: dict or str If str, it must be a path to a yaml file Returns ------- dict Raises ------ ValueError"""

    try:
        return dict(d)
    except TypeError:
        d = validate_path_exists(d)
        try:
            with open(d) as f:
                return dict(yaml.load(f))
        except Exception:
            raise ValueError("Could not convert {} to dictionary!".format(d))