lsb_release在安装Python 3.6.3后无法正常工作

问题描述：

平台：ubuntu 17.04服务器lsb_release在安装Python 3.6.3后无法正常工作

ubuntu 17.04服务器安装包括python 2.7和python 3.5。我从源码手动安装了Python 3.6.3。然而，lsb_release -a失败：

[email protected]:~# lsb_release -a 
Traceback (most recent call last): 
    File "/usr/bin/lsb_release", line 25, in <module> 
    import lsb_release 
ModuleNotFoundError: No module named 'lsb_release'

但是如果我修改该文件lsb_release的第一线，从
#!/usr/bin/python3 -Es 到 #!/usr/bin/python3.5 -Es 再次工作。

[email protected]:~# lsb_release -a 
LSB Version: core-9.20160110ubuntu5-amd64:core-9.20160110ubuntu5-noarch:security-9.20160110ubuntu5-amd64:security-9.20160110ubuntu5-noarch 
Distributor ID: Ubuntu 
Description: Ubuntu 17.04 
Release: 17.04 
Codename: zesty

这里是模块搜索路径：

python3.5

[email protected]:~# python3.5 
Python 3.5.3 (default, Sep 14 2017, 22:58:41) 
[GCC 6.3.0 20170406] on linux 
Type "help", "copyright", "credits" or "license" for more information. 
>>> import sys 

>>> sys.path 
['', '/usr/lib/python35.zip', '/usr/lib/python3.5', '/usr/lib/python3.5/plat-x86_64-linux-gnu', '/usr/lib/python3.5/lib-dynload', '/usr/local/lib/python3.5/dist-packages', '/usr/lib/python3/dist-packages'] 

>>> import lsb_release 

>>> exit()

python3

[email protected]:~# python3 
Python 3.6.3 (default, Oct 14 2017, 20:35:42) 
[GCC 6.3.0 20170406] on linux 
Type "help", "copyright", "credits" or "license" for more information. 
>>> import sys 

>>> sys.path 
['', '/usr/local/lib/python36.zip', '/usr/local/lib/python3.6', '/usr/local/lib/python3.6/lib-dynload', '/root/.local/lib/python3.6/site-packages', '/usr/local/lib/python3.6/site-packages'] 

>>> import lsb_release 
Traceback (most recent call last): 
    File "<stdin>", line 1, in <module> 
ModuleNotFoundError: No module named 'lsb_release' 

>>> exit()

没有人知道如何解决它？谢谢。

为什么没有从PPA安装Python 3.6？ –

看起来像您使用'make install'而不是'make altinstall'？（请参阅https://docs.python.org/3.6/using/unix.html#building-python）。你*可能*能够通过指向你的Python的'python3'符号链接来恢复。5二进制文件，但您可能需要重新安装整个操作系统。 – snakecharmerb

答

解决方案：

sudo ln -s /usr/share/pyshared/lsb_release.py /usr/local/lib/python3.6/site-packages/lsb_release.py

解释：

我们可以在/usr/bin/lsb_release

#!/usr/bin/python3 -Es 

# lsb_release command for Debian 
# (C) 2005-10 Chris Lawrence <[email protected]> 
# This package is free software; you can redistribute it and/or modify 
# it under the terms of the GNU General Public License as published by 
# the Free Software Foundation; version 2 dated June, 1991. 
# This package is distributed in the hope that it will be useful, 
# but WITHOUT ANY WARRANTY; without even the implied warranty of 
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
# GNU General Public License for more details. 
# You should have received a copy of the GNU General Public License 
# along with this package; if not, write to the Free Software 
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 
# 02110-1301 USA 
from optparse import OptionParser 
import sys 
import os 
import re 

import lsb_release

的关键步骤是import lsb_release，但问题是Python 3.6没有看到这个模块。

所以，你必须超越python3从python3.5到python3.6。这就是为什么你的lsb_release坏了。

为了验证它，我们可以在python3.6看到：

➜ ~ python3.6 
Python 3.6.4 (default, Feb 6 2018, 16:57:12) 
[GCC 5.4.0 20160609] on linux 
Type "help", "copyright", "credits" or "license" for more information. 
>>> import lsb_release 
Traceback (most recent call last): 
    File "<stdin>", line 1, in <module> 
ModuleNotFoundError: No module named 'lsb_release'

然后在python3.5：

➜ ~ python3.5 
Python 3.5.2 (default, Nov 23 2017, 16:37:01) 
[GCC 5.4.0 20160609] on linux 
Type "help", "copyright", "credits" or "license" for more information. 
>>> import lsb_release 
>>> lsb_release.__file__ 
'/usr/lib/python3/dist-packages/lsb_release.py'

哪里是这个文件：

➜ ~ ll /usr/lib/python3/dist-packages/lsb_release.py 
lrwxrwxrwx 1 root root 38 Jul 7 2016 /usr/lib/python3/dist-packages/lsb_release.py -> ../../../share/pyshared/lsb_release.py

所以，这个模块lsb_release存在于python3.5但不存在于python3.6。我们最终找到它！

现在让我们通过添加一个链接到原来的lsb_release.py文件！

它适合我！

lsb_release在安装Python 3.6.3后无法正常工作

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