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深度學習入門之Pytorch高清版附源碼

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from?datetime?import?datetime

import?torch
import?torch.nn.functional?as?F
from?torch?import?nn
from?torch.autograd?import?Variable


def?get_acc(output?label):
????total?=?output.shape[0]
????_?pred_label?=?output.max(1)
????num_correct?=?(pred_label?==?label).sum().data[0]
????return?num_correct?/?total


def?train(net?train_data?valid_data?num_epochs?optimizer?criterion):
????if?torch.cuda.is_available():
????????net?=?net.cuda()
????prev_time?=?datetime.now()
????for?epoch?in?range(num_epochs):
????????train_loss?=?0
????????train_acc?=?0
????????net?=?net.train()
????????for?im?label?in?train_data:
????????????if?torch.cuda.is_available():
????????????????im?=?Variable(im.cuda())??#?(bs?3?h?w)
????????????????label?=?Variable(label.cuda())??#?(bs?h?w)
????????????else:
????????????????im?=?Variable(im)
????????????????label?=?Variable(label)
????????????#?forward
????????????output?=?net(im)
????????????loss?=?criterion(output?label)
????????????#?backward
????????????optimizer.zero_grad()
????????????loss.backward()
????????????optimizer.step()

????????????train_loss?+=?loss.data[0]
????????????train_acc?+=?get_acc(output?label)

????????cur_time?=?datetime.now()
????????h?remainder?=?divmod((cur_time?-?prev_time).seconds?3600)
????????m?s?=?divmod(remainder?60)
????????time_str?=?“Time?%02d:%02d:%02d“?%?(h?m?s)
????????if?valid_data?is?not?None:
????????????valid_loss?=?0
????????????valid_acc?=?0
????????????net?=?net.eval()
????????????for?im?label?in?valid_data:
????????????????if?torch.cuda.is_available():
????????????????????im?=?Variable(im.cuda()?volatile=True)
????????????????????label?=?Variable(label.cuda()?volatile=True)
????????????????else:
????????????????????im?=?Variable(im?volatile=True)
????????????????????label?=?Variable(label?volatile=True)
????????????????output?=?net(im)
????????????????loss?=?criterion(output?label)
????????????????valid_loss?+=?loss.data[0]
????????????????valid_acc?+=?get_acc(output?label)
????????????epoch_str?=?(
????????????????“Epoch?%d.?Train?Loss:?%f?Train?Acc:?%f?Valid?Loss:?%f?Valid?Acc:?%f?“
????????????????%?(epoch?train_loss?/?len(train_data)
???????????????????train_acc?/?len(train_data)?valid_loss?/?len(valid_data)
???????????????????valid_acc?/?len(valid_data)))
????????else:
????????????epoch_str?=?(“Epoch?%d.?Train?Loss:?%f?Train?Acc:?%f?“?%
?????????????????????????(epoch?train_loss?/?len(train_data)
??????????????????????????train_acc?/?len(train_data)))
????????prev_time?=?cur_time
????????print(epoch_str?+?time_str)


def?conv3x3(in_channel?out_channel?stride=1):
????return?nn.Conv2d(
????????in_channel?out_channel?3?stride=stride?padding=1?bias=False)


class?residual_block(nn.Module):
????def?__init__(self?in_channel?out_channel?same_shape=True):
????????super(residual_block?self).__init__()
????????self.same_shape?=?same_shape
????????stride?

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????337??2018-04-29?22:38??深度學習入門之Pytorch源碼\.git\config

?????文件?????????73??2018-04-29?22:37??深度學習入門之Pytorch源碼\.git\description

?????文件?????????23??2018-04-29?22:38??深度學習入門之Pytorch源碼\.git\HEAD

?????文件????????478??2018-04-29?22:37??深度學習入門之Pytorch源碼\.git\hooks\applypatch-msg.sample

?????文件????????896??2018-04-29?22:37??深度學習入門之Pytorch源碼\.git\hooks\commit-msg.sample

?????文件???????3327??2018-04-29?22:37??深度學習入門之Pytorch源碼\.git\hooks\fsmonitor-watchman.sample

?????文件????????189??2018-04-29?22:37??深度學習入門之Pytorch源碼\.git\hooks\post-update.sample

?????文件????????424??2018-04-29?22:37??深度學習入門之Pytorch源碼\.git\hooks\pre-applypatch.sample

?????文件???????1642??2018-04-29?22:37??深度學習入門之Pytorch源碼\.git\hooks\pre-commit.sample

?????文件???????1348??2018-04-29?22:37??深度學習入門之Pytorch源碼\.git\hooks\pre-push.sample

?????文件???????4898??2018-04-29?22:37??深度學習入門之Pytorch源碼\.git\hooks\pre-rebase.sample

?????文件????????544??2018-04-29?22:37??深度學習入門之Pytorch源碼\.git\hooks\pre-receive.sample

?????文件???????1492??2018-04-29?22:37??深度學習入門之Pytorch源碼\.git\hooks\prepare-commit-msg.sample

?????文件???????3610??2018-04-29?22:37??深度學習入門之Pytorch源碼\.git\hooks\update.sample

?????文件??????14291??2018-04-29?22:38??深度學習入門之Pytorch源碼\.git\index

?????文件????????240??2018-04-29?22:37??深度學習入門之Pytorch源碼\.git\info\exclude

?????文件????????214??2018-04-29?22:38??深度學習入門之Pytorch源碼\.git\logs\HEAD

?????文件????????214??2018-04-29?22:38??深度學習入門之Pytorch源碼\.git\logs\refs\heads\master

?????文件????????214??2018-04-29?22:38??深度學習入門之Pytorch源碼\.git\logs\refs\remotes\origin\HEAD

?????文件??????18992??2018-04-29?22:38??深度學習入門之Pytorch源碼\.git\objects\pack\pack-cdeb506a0b05e58a6ebfc7a6b6d7883cadaa6aea.idx

?????文件???19641426??2018-04-29?22:38??深度學習入門之Pytorch源碼\.git\objects\pack\pack-cdeb506a0b05e58a6ebfc7a6b6d7883cadaa6aea.pack

?????文件????????114??2018-04-29?22:38??深度學習入門之Pytorch源碼\.git\packed-refs

?????文件?????????41??2018-04-29?22:38??深度學習入門之Pytorch源碼\.git\refs\heads\master

?????文件?????????32??2018-04-29?22:38??深度學習入門之Pytorch源碼\.git\refs\remotes\origin\HEAD

?????文件?????????25??2018-04-29?22:38??深度學習入門之Pytorch源碼\.gitignore

?????文件??????10171??2018-04-29?22:38??深度學習入門之Pytorch源碼\aws.md

?????文件??????25120??2018-04-29?22:38??深度學習入門之Pytorch源碼\chapter10_Natural-Language-Process\char_rnn\char_rnn.ipynb

?????文件???????1732??2018-04-29?22:38??深度學習入門之Pytorch源碼\chapter10_Natural-Language-Process\char_rnn\config.py

?????文件???????3031??2018-04-29?22:38??深度學習入門之Pytorch源碼\chapter10_Natural-Language-Process\char_rnn\data\dataset.py

?????文件????????124??2018-04-29?22:38??深度學習入門之Pytorch源碼\chapter10_Natural-Language-Process\char_rnn\data\__init__.py

............此處省略166個文件信息

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