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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_merge(o, v):
    '''
    Recursively climbs through dictionaries and merges them together.

    :param o:
        The first dictionary
    :param v:
        The second dictionary
    :returns:
        A dictionary (who would have guessed?)

    .. note::
        Make sure `o` & `v` are indeed dictionaries,
        bad things will happen otherwise!
    '''

    if not isinstance(v, dict):
        return v
    res = _deepcopy(o)
    for key in v.keys():
        if res.get(key) and isinstance(res[key], dict):
            res[key] = dict_merge(res[key], v[key])
        else:
            res[key] = _deepcopy(v[key])
    return res