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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 _identify_dict(core):
 """Specification for a dictionary."""

    if not core:
        return {}, 1, (), int

    core = core.copy()
    key = sorted(core.keys(), key=chaospy.poly.base.sort_key)[0]
    shape = numpy.array(core[key]).shape
    dtype = numpy.array(core[key]).dtype
    dim = len(key)
    return core, dim, shape, dtype