更新Python2.7.5到Python2.7.16

最新推荐文章于 2024-05-31 07:52:25 发布

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最新推荐文章于 2024-05-31 07:52:25 发布

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分类专栏： Python 文章标签： Python No module named yum urlgrabber.grabber _ssl Python2.7.5

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本文详细介绍了如何在Linux环境下将默认安装的Python2.7版本升级到2.7.16的过程，包括下载源码包、指定前缀进行安装、避免覆盖默认Python的步骤，以及解决升级后可能遇到的模块缺失问题。

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Upgrade Python2.7.5 to Python2.7.16

Python has already been installed in Linux by default, but the version is usually not up to date.

Install Python 2.7.16

Download from https://www.python.org/ftp/python/2.7.16/Python-2.7.16.tgz

Specify prefix and use altinstall in case overwriting the default Python.

tar zxvf Python-2.7.16.tgz
cd Python-2.7.16

sudo ./configure --prefix=/usr/local
sudo make
sudo make altinstall

mv /usr/bin/python /usr/bin/python2.7.5
ln -s /usr/local/bin/python2.7 /usr/bin/python

We can find the different version python under usr/bin.

$ python -V
Python 2.7.16
$ python2.7.5 -V
Python 2.7.5
$ python2.7 -V
Python 2.7.16
$ python2 -V
Python 2.7.5

替换旧python的操作，如非真的必要，不建议。

因为替换后发现一些系统命令会出问题，范围似乎也无法预知，有些风险。

No module named yum

Yum does not work after Python upgrade.

$ sudo yum install zlib
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:

   No module named yum

Please install a package which provides this module, or
verify that the module is installed correctly.

It's possible that the above module doesn't match the
current version of Python, which is:
2.7.16 (default, Aug 30 2019, 16:44:16)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-39)]

If you cannot solve this problem yourself, please go to
the yum faq at:
  http://yum.baseurl.org/wiki/Faq

sudo vi /usr/bin/yum

Change #! /usr/bin/python to #! /usr/bin/python2

ImportError: No module named urlgrabber.grabber

Downloading packages:
Traceback (most recent call last):
  File "/usr/libexec/urlgrabber-ext-down", line 22, in <module>
    from urlgrabber.grabber import \
ImportError: No module named urlgrabber.grabber
Traceback (most recent call last):
  File "/usr/libexec/urlgrabber-ext-down", line 22, in <module>
    from urlgrabber.grabber import \
ImportError: No module named urlgrabber.grabber

sudo vi /usr/libexec/urlgrabber-ext-down

Change #! /usr/bin/python to #! /usr/bin/python2

vi Python-2.7.16/Modules/Setup.dist

#zlib zlibmodule.c -I$(prefix)/include -L$(exec_prefix)/lib -lz
zlib zlibmodule.c -I$(prefix)/include -L$(exec_prefix)/lib -lz

Install Python again.

sudo ./configure --prefix=/usr/local
sudo make
sudo make altinstall

ImportError: No module named _ssl

sudo yum install openssl-devel

sudo vi /Modules/Setup

#_socket socketmodule.c timemodule.c
_socket socketmodule.c timemodule.c

Install Python again.