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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 dict_deep_merge(tgt, src):
 """ Utility function to merge the source dictionary `src` to the target dictionary recursively Note: The type of the values in the dictionary can only be `dict` or `list` Parameters: tgt (dict):
 The target dictionary src (dict):
 The source dictionary """

    for k, v in src.items():
        if k in tgt:
            if isinstance(tgt[k], dict) and isinstance(v, dict):
                dict_deep_merge(tgt[k], v)
            else:
                tgt[k].extend(deepcopy(v))
        else:
            tgt[k] = deepcopy(v)