【Python】【解决】UnicodeDecodeError: 'ascii' codec can't decode byte 0xe5 in position 1: ordinal not in r

系统管理员 2022-08-09 00:43 125阅读 0赞

转载自：http://www.cnblogs.com/QuLory/p/3615584.html

# 1、问题描述 #

今天在升级Ubuntu到14.04，使用命令行启动软件更新器，进行版本升级，结果开始升级就异常退出了，具体打印如下：

![复制代码][copycode.gif]

$update-manager -d
    正在检查新版 Ubuntu
    使用 'trusty.tar.gz.gpg' 对 'trusty.tar.gz' 进行验证 
    正在提取 'trusty.tar.gz'
    Traceback (most recent call last):
      File "/tmp/ubuntu-release-upgrader-r_0oij/trusty", line 10, in <module>
        sys.exit(main())
      File "/tmp/ubuntu-release-upgrader-r_0oij/DistUpgrade/DistUpgradeMain.py", line 243, in main
        if app.run():
      File "/tmp/ubuntu-release-upgrader-r_0oij/DistUpgrade/DistUpgradeController.py", line 1826, in run
        return self.fullUpgrade()
      File "/tmp/ubuntu-release-upgrader-r_0oij/DistUpgrade/DistUpgradeController.py", line 1717, in fullUpgrade
        if not self.updateSourcesList():
      File "/tmp/ubuntu-release-upgrader-r_0oij/DistUpgrade/DistUpgradeController.py", line 760, in updateSourcesList
        if not self.rewriteSourcesList(mirror_check=True):
      File "/tmp/ubuntu-release-upgrader-r_0oij/DistUpgrade/DistUpgradeController.py", line 736, in rewriteSourcesList
        logging.debug("entry '%s' was disabled (unknown mirror)" % get_string_with_no_auth_from_source_entry(entry))
      File "/tmp/ubuntu-release-upgrader-r_0oij/DistUpgrade/utils.py", line 89, in get_string_with_no_auth_from_source_entry
        return str(tmp)
      File "/tmp/ubuntu-release-upgrader-r_0oij/DistUpgrade/sourceslist.py", line 232, in __str__
        return self.str().strip()
      File "/tmp/ubuntu-release-upgrader-r_0oij/DistUpgrade/sourceslist.py", line 256, in str
        line += u" #%s" % self.comment
    UnicodeDecodeError: 'ascii' codec can't decode byte 0xe5 in position 1: ordinal not in range(128)

![复制代码][copycode.gif]

# 2、方案探索 #

主要错误是上面最后一行的Unicode解码问题，网上搜索说是读取文件时使用的编码默认时ascii而不是utf8，导致的错误；原始资料路径为：

http://blog.csdn.net/vincent_czz/article/details/7719012

在代码中加上如下几句即可。

import sys
    reload(sys)
    sys.setdefaultencoding('utf8')

[http://docs.python.org/howto/unicode.html][http_docs.python.org_howto_unicode.html] 这个是python的unicode编码API文档，英文好的同学可以看一下，加深理解。

# 3、解决方案 #

### 3.1 拷贝临时数据到本地 ###

根据上面错误提示，拷贝升级包代码到本地，并修改权限为自己可以编辑

$sudo cp -R /tmp/ubuntu-release-upgrader-r_0oij ./upgrade
    $sudo chown qunengrong:qunengrong upgrade/ -R

### 3.2 修正读取文件的代码 ###

打开上面报错的文件，如DistUpgradeMain.py，进行编辑并保存；

![复制代码][copycode.gif]

## 原来为下面行
    #import sys
    ## 改为下面的3行
    import sys
    reload(sys)
    sys.setdefaultencoding('utf8')

![复制代码][copycode.gif]

### 3.3 手动启动升级 ###

为了安全和防止升级过程被打断，建议提交到后台执行，如使用nohup，输入密码后按CTRL+Z终端，然后输入bg命令让其后台执行：

![复制代码][copycode.gif]

$nohup sudo ./trusty 
    nohup: 忽略输入并把输出追加到"nohup.out"
    [sudo] password for qunengrong: 
    
    ^Z
    [1]+  已停止               nohup sudo ./trusty
    qunengrong@qunengrong-Studio-1450 ~/tests/apt/upgrade
    $bg
    [1]+ nohup sudo ./trusty &

![复制代码][copycode.gif]

已经可以正常升级了，如下：

![211231401154266.png][]

[copycode.gif]: /images/20220731/e85aa8b57fff43869964d4767e25a942.png
[http_docs.python.org_howto_unicode.html]: http://docs.python.org/howto/unicode.html
[211231401154266.png]: /images/20220731/8b37b38868f445449e372b034d74eb72.png

【Python】【解决】UnicodeDecodeError: 'ascii' codec can't decode byte 0xe5 in position 1: ordinal not in r

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