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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 _new_alloc_handle(shape, ctx, delay_alloc, dtype=mx_real_t):
 """Return a new handle with specified shape and context. Empty handle is only used to hold results. Returns ------- handle A new empty `NDArray` handle. """

    hdl = NDArrayHandle()
    check_call(_LIB.MXNDArrayCreateEx(
        c_array_buf(mx_uint, native_array('I', shape)),
        mx_uint(len(shape)),
        ctypes.c_int(ctx.device_typeid),
        ctypes.c_int(ctx.device_id),
        ctypes.c_int(int(delay_alloc)),
        ctypes.c_int(int(_DTYPE_NP_TO_MX[np.dtype(dtype).type])),
        ctypes.byref(hdl)))
    return hdl