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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 _safe_get(mapping, key, default=None):
 """Helper for accessing style values. It exists to avoid checking whether `mapping` is indeed a mapping before trying to get a key. In the context of style dicts, this eliminates "is this a mapping" checks in two common situations: 1) a style argument is None, and 2) a style key's value (e.g., width) can be either a mapping or a plain value. """

    try:
        return mapping.get(key, default)
    except AttributeError:
        return default