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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 _get_atomic_dtype(data_type):
 """Retrieve the NumPy's `dtype` for a given atomic data type."""

    atomic_type = getattr(data_type, 'type', None)
    if atomic_type is not None:
        return atomic_type

    return _PREDEFINED_ATOMIC_NUMPY_TYPES[_find_base_type(data_type)]