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pytorch加載自定義網(wǎng)絡(luò)權(quán)重的實(shí)現(xiàn)

 更新時(shí)間:2020年01月07日 14:25:31   作者:wuming無名  
今天小編就為大家分享一篇pytorch加載自定義網(wǎng)絡(luò)權(quán)重的實(shí)現(xiàn),具有很好的參考價(jià)值,希望對(duì)大家有所幫助。一起跟隨小編過來看看吧

在將自定義的網(wǎng)絡(luò)權(quán)重加載到網(wǎng)絡(luò)中時(shí),報(bào)錯(cuò):

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.

我們一步一步分析。

模型網(wǎng)絡(luò)權(quán)重保存額代碼是:torch.save(net.state_dict(),'net.pkl')

(1)查看獲取模型權(quán)重的源碼:

pytorch源碼: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']

  """

將網(wǎng)絡(luò)中所有的狀態(tài)保存到一個(gè)字典中了,我自己構(gòu)建的就是一個(gè)字典,沒問題!

(2)查看保存模型權(quán)重的源碼:

pytorch源碼: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.

函數(shù)功能是將字典保存為磁盤文件(二進(jìn)制數(shù)據(jù)),那么我們?cè)趖orch.load()時(shí),就是在內(nèi)存中加載二進(jìn)制數(shù)據(jù),這就是報(bào)錯(cuò)點(diǎn)。

解決方案:將字典保存為BytesIO文件之后,模型再net.load_state_dict()

#b為自定義的字典
torch.save(b,'new.pkl')
net.load_state_dict(torch.load(b))

解決方法很簡單,主要記錄解決思路。

以上這篇pytorch加載自定義網(wǎng)絡(luò)權(quán)重的實(shí)現(xiàn)就是小編分享給大家的全部內(nèi)容了,希望能給大家一個(gè)參考,也希望大家多多支持腳本之家。

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