Visible Deprecation Warning: Creating an ndarray from ragged nested sequences (which is list or tupl

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问题

VisibleDeprecationWarning: Creating an ndarray from ragged nested sequences (which is a list-or-tuple of lists-or-tuples-or ndarrays with different lengths or shapes) is deprecated. If you meant to do this, you must specify 'dtype=object' when creating the ndarray

原因

这是因为新的numpy版本，将 创建不同长度或形状的列表或元组或ndarray的列表或ndarray元组的功能 会被弃用，虽然能够运行，但是总提示Warning还是很不舒服，况且之后也不能这样用了。
这里先复现一下错误，让大家更好理解：

import numpy as np
test_list=[[12,12],[1,2],[0]]
bboxes = np.array(test_list)
print(bboxes)

VisibleDeprecationWarning: Creating an ndarray from ragged nested sequences (which is a list-or-tuple of lists-or-tuples-or ndarrays with different lengths or shapes) is deprecated. If you meant to do this, you must specify ‘dtype=object’ when creating the ndarray.
bboxes = np.array(test_list)

解决办法

1. 方法一：使用更早的numpy版本
2. 方法二：加上’dtype=object’

bboxes = np.array(test_list,dtype=object)

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