测试过程中报错，python版本需要多少？

[jayli517]

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Traceback (most recent call last):
File "C:/develop_jay/BatchChineseOcr/run.py", line 89, in
main()
File "C:/develop_jay/BatchChineseOcr/run.py", line 85, in main
result = ocr.job(test_path)
File "C:/develop_jay/BatchChineseOcr/run.py", line 58, in job
for batch_partImg in temp_partImg_loader:
File "C:\develop_jay\BatchChineseOcr\ocr.py", line 146, in getitem
img = img.convert('L')
AttributeError: 'list' object has no attribute 'convert'