问题一：图片大小问题

报错：

F:\Anaconda\envs\paddle\lib\site-packages\paddle\fluid\reader.py:811: 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
  arr = np.array(item)
2020-12-15 16:30:02,138-WARNING: DygraphDataLoader reader thread raised an exception.
Traceback (most recent call last):
  File "F:/Programs/3DOB/D4LCNpaddle/try.py", line 95, in <module>
    main()
  File "F:/Programs/3DOB/D4LCNpaddle/try.py", line 90, in main
    for idx, (data, label) in enumerate(dataloader):
  File "F:\Anaconda\envs\paddle\lib\site-packages\paddle\fluid\reader.py", line 804, in __next__
    return self._reader.read_next_var_list()
paddle.fluid.core_avx.EnforceNotMet: 

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C++ Call Stacks (More useful to developers):
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Windows not support stack backtrace yet.

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Error Message Summary:
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Error: Blocking queue is killed because the data reader raises an exception
  [Hint: Expected killed_ != true, but received killed_:1 == true:1.] at (D:\1.8.0cpu\paddle\paddle/fluid/operators/reader/blocking_queue.h:141)

解决：
利用transformer将图片size调整到统一size

问题二：paddle无法读取easydict

问题：paddlepaddle自带的dataloader无法读取字典类型（dict）
解决：采用迭代器，yeild方法写自己的dataloader