pytorch加载自定义网络权重的实现

在将自定义的网络权重加载到网络中时，报错：

AttributeError: 'dict' object has no attribute 'seek'. You can only torch.load from a file that is seekable. Please pre-load the data into a buffer like io.BytesIO and try to load from it instead.

我们一步一步分析。

模型网络权重保存额代码是：torch.save(net.state_dict(),'net.pkl')

（1）查看获取模型权重的源码：

pytorch源码：net.state_dict()

def state_dict(self, destination=None, prefix='', keep_vars=False):
 r"""Returns a dictionary containing a whole state of the module.

Both parameters and persistent buffers (e.g. running averages) are
 included. Keys are corresponding parameter and buffer names.

Returns:
   dict:
     a dictionary containing a whole state of the module

Example::

>>> module.state_dict().keys()
   ['bias', 'weight']

"""

将网络中所有的状态保存到一个字典中了，我自己构建的就是一个字典，没问题！

（2）查看保存模型权重的源码:

pytorch源码：torch.save()

def save(obj, f, pickle_module=pickle, pickle_protocol=DEFAULT_PROTOCOL):
 """Saves an object to a disk file.

See also: :ref:`recommend-saving-models`

Args:
   obj: saved object
   f: a file-like object (has to implement write and flush) or a string
     containing a file name
   pickle_module: module used for pickling metadata and objects
   pickle_protocol: can be specified to override the default protocol

.. warning::
   If you are using Python 2, torch.save does NOT support StringIO.StringIO
   as a valid file-like object. This is because the write method should return
   the number of bytes written; StringIO.write() does not do this.

Please use something like io.BytesIO instead.

函数功能是将字典保存为磁盘文件（二进制数据），那么我们在torch.load（）时，就是在内存中加载二进制数据，这就是报错点。

解决方案：将字典保存为BytesIO文件之后，模型再net.load_state_dict()

#b为自定义的字典
torch.save(b,'new.pkl')
net.load_state_dict(torch.load(b))

解决方法很简单，主要记录解决思路。

来源：https://blog.csdn.net/qq_34789262/article/details/83376374