KeyError：“无法删除链接（无法删除自己）”

Question

我正在尝试删除HDF5文件中的数据集。具体来说，我试图从我之前训练和保存的keras深度学习模型中删除优化器层。

代码如下

f = h5py.File('model.h5', 'r+')
del f['optimizer_weights']
f.close()

错误是

KeyError: "Couldn't delete link (Can't delete self)

错误消息详细说明

    del f['optimizer_weights']
  File "h5py\_objects.pyx", line 54, in h5py._objects.with_phil.wrapper (D:\Build\h5py\h5py-2.7.0\h5py\_objects.c:2853)
  File "h5py\_objects.pyx", line 55, in h5py._objects.with_phil.wrapper (D:\Build\h5py\h5py-2.7.0\h5py\_objects.c:2811)
  File "C:\Users\Anaconda3\envs\tensorflow-keras-gpu\lib\site-packages\h5py\_hl\group.py", line 297, in __delitem__
    self.id.unlink(self._e(name))
  File "h5py\_objects.pyx", line 54, in h5py._objects.with_phil.wrapper (D:\Build\h5py\h5py-2.7.0\h5py\_objects.c:2853)
  File "h5py\_objects.pyx", line 55, in h5py._objects.with_phil.wrapper (D:\Build\h5py\h5py-2.7.0\h5py\_objects.c:2811)
  File "h5py\h5g.pyx", line 294, in h5py.h5g.GroupID.unlink (D:\Build\h5py\h5py-2.7.0\h5py\h5g.c:4179)
KeyError: "Couldn't delete link (Can't delete self)"

对于如何解决这个问题，有任何的建议吗 ？？

谢谢！

Answer 1

你确定数据集实际上在那里吗？在尝试删除不存在的数据集时，我遇到了这个错误的错误。

def printname(name):
    print(name)

f.visit(printname)

# list of datasets, should contain 'dataset_name'

在代码中，您遗憾的是每次删除之前都需要检查是否存在。要“覆盖”可能已存在的数据集：

with h5py.File('/path/to/h5', 'a') as f:
    if f.get('dataset_name'):
        del f['dataset_name']
    f['dataset_name'] = 'new value'

Answer 2

相当古老的问题，但尝试将文件置于写入或追加模式

f = h5py.File('model.h5', 'a')