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DS-1000 / 948 / How to convert a numpy array of dtype=object to torch Tensor?

Problem

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Problem:

How to convert a numpy array of dtype=object to torch Tensor?

array([
   array([0.5, 1.0, 2.0], dtype=float16),
   array([4.0, 6.0, 8.0], dtype=float16)
], dtype=object)


A:

<code>
import pandas as pd
import torch
import numpy as np
x_array = load_data()
</code>
x_tensor = ... # put solution in this variable
BEGIN SOLUTION
<code>

library

Pytorch

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Source and history

upstream_id / Original problem ID
948
task_id
794ff374-87af-5700-a99c-aa5793d6667a
task_key
default--test--948
task_revision_id
1
config / split
default / test

Official source

initial import