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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 _row_sparse_ndarray_from_definition(data, indices, shape=None, ctx=None, dtype=None, indices_type=None):
 """Create a `RowSparseNDArray` based on data and indices"""

    storage_type = 'row_sparse'
    # context
    ctx = current_context() if ctx is None else ctx
    # types
    dtype = _prepare_default_dtype(data, dtype)
    indices_type = _STORAGE_AUX_TYPES[storage_type][0] if indices_type is None else indices_type
    # prepare src array and types
    data = _prepare_src_array(data, dtype)
    indices = _prepare_src_array(indices, indices_type)

    # TODO(junwu): Convert data, indptr, and indices to mxnet NDArrays
    # if they are not for now. In the future, we should provide a c-api
    # to accept np.ndarray types to copy from to result.data and aux_data
    if not isinstance(data, NDArray):
        data = _array(data, ctx, dtype)
    if not isinstance(indices, NDArray):
        indices = _array(indices, ctx, indices_type)
    if shape is None:
        num_indices = indices.shape[0]
        if num_indices == 0:
            raise ValueError('invalid shape')
        dim0 = indices[num_indices - 1].asscalar() + 1
        shape = (dim0, ) + data.shape[1:]
    # verify shapes
    if data.ndim != len(shape) or indices.ndim != 1 or np.prod(shape[1:]) == 0:
        raise ValueError("invalid shape")
    result = RowSparseNDArray(_new_alloc_handle(storage_type, shape, ctx, False, dtype,
                                                [indices_type], [indices.shape]))
    check_call(_LIB.MXNDArraySyncCopyFromNDArray(result.handle, data.handle, ctypes.c_int(-1)))
    check_call(_LIB.MXNDArraySyncCopyFromNDArray(result.handle, indices.handle, ctypes.c_int(0)))
    return result