python报错 VisibleDeprecationWarning: Creating an ndarray from ragged nested sequences

python报错 VisibleDeprecationWarning: Creating an ndarray from ragged nested sequences

报错原因：numpy中元素shape不一致
解决方案：对元素进行统一shape，可以使用指定数值填充法

/opt/conda/envs/common-1/lib/python3.7/site-packages/ipykernel_launcher.py:44: 
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
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