linux python升级和ipython的安装

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发布时间：2019-06-20

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==CentOS 6.X 自带的python版本是 2.6 , 由于工作需要，很多时候需要2.7版本。所以需要进行版本升级。由于一些系统工具和服务是对 Python 有依赖的，所以升级 Python 版本需要注意。==

升级步骤

如何欢乐的，没有痛苦的升级python版本，往下看 …

更新系统和开发工具集

更新指令[root@localhost ~]# yum -y update[root@localhost ~]# yum groupinstall -y 'development tools'另外还需要安装 python 工具需要的额外软件包 SSL, bz2, zlib[root@localhost ~]# yum install -y zlib-devel bzip2-devel openssl-devel xz-libs wget源码安装Python 2.7.x[root@localhost ~]# wget http://www.python.org/ftp/python/2.7.8/Python-2.7.8.tar.xz[root@localhost ~]# xz -d Python-2.7.8.tar.xz[root@localhost ~]# tar -xvf Python-2.7.8.tar

安装详情：

# 进入目录:[root@localhost ~]# cd Python-2.7.8# 运行配置 configure:    加上--enable-shared 以后需要用到libpython 库[root@localhost ~]# ./configure --enable-shared --prefix=/usr/local# 编译安装:[root@localhost ~]# make [root@localhost ~]# make altinstall# 检查 Python 版本:[root@localhost ~]# python2.7 -VPython 2.7.8

[root@localhost Python-2.7.8]# python2.7 -Vpython2.7: error while loading shared libraries: libpython2.7.so.1.0: cannot open shared object file: No such file or directory[root@localhost Python-2.7.8]# find /|grep libpython2.7.so.1.0/opt/Python-2.7.8/libpython2.7.so.1.0/usr/local/lib/libpython2.7.so.1.0[root@localhost Python-2.7.8]# cp -a libpython2.7.so.1.0 /usr/lib/[root@localhost Python-2.7.8]# python2.7 -Vpython2.7: error while loading shared libraries: libpython2.7.so.1.0: cannot open shared object file: No such file or directory[root@localhost Python-2.7.8]# ldconfig[root@localhost Python-2.7.8]# python2.7 -VPython 2.7.8[root@localhost Python-2.7.8]#

设置 PATH

为了我们能够方便的使用Python，我们需要设置系统变量或者建立软连接将新版本的 Python

加入到 path 对应的目录：

[root@localhost ~]# export PATH="/usr/local/bin:$PATH"or [root@localhost ~]# ln -s /usr/local/bin/python2.7  /usr/bin/python# 检查[root@localhost ~]# python -VPython 2.7.8[root@localhost ~]# which python/usr/bin/python

安装 setuptools

#获取软件包[root@localhost ~]# wget --no-check-certificate https://pypi.python.org/packages/source/s/setuptools/setuptools-1.4.2.tar.gz #解压:[root@localhost ~]# tar -xvf setuptools-1.4.2.tar.gz[root@localhost ~]# cd setuptools-1.4.2# 使用 Python 2.7.8 安装 setuptools[root@localhost ~]# python2.7 setup.py install

安装 PIP

[root@localhost ~]# curl --insecure https://bootstrap.pypa.io/get-pip.py | python2.7 -

修复 yum 工具

此时yum应该是失效的，因为此时默认python版本已经是2.7了。而yum需要的是2.6 所以：

[root@localhost ~]# which yum/usr/bin/yum

修改 yum中的python

[root@localhost ~]# vi /usr/bin/yum#!/usr/bin/python2.6……

将第一行 #!/usr/bin/python 改为 #!/usr/bin/python2.6此时yum就ok啦

安装ipython

yum 安装

[root@localhost ~]# yum install ipython -y

pip install ipython #前提你有安装setuptools才有pip

[root@localhost ~]# pip install ipython

[root@localhost ~]# ipython/usr/local/lib/python2.7/site-packages/IPython/frontend.py:21: ShimWarning: The top-level `frontend` package has been deprecated. All its subpackages have been moved to the top `IPython` level.  "All its subpackages have been moved to the top `IPython` level.", ShimWarning)/usr/local/lib/python2.7/site-packages/IPython/core/history.py:228: UserWarning: IPython History requires SQLite, your history will not be saved  warn("IPython History requires SQLite, your history will not be saved")Python 2.7.8 (default, Oct 18 2016, 10:37:37) Type "copyright", "credits" or "license" for more information.IPython 5.1.0 -- An enhanced Interactive Python.?         -> Introduction and overview of IPython's features.%quickref -> Quick reference.help      -> Python's own help system.object?   -> Details about 'object', use 'object??' for extra details.In [1]: print ( "hello word!" )hello word!

扩展python模块

pip install requests  pip install Flaskpip install fabricpip install psutilpip install IPypip install dnspythonpip install MySQL-python    #1. yum install mysql-devel.x86_64    #2. pip install mysql-python

python数据库安装时错误解决办法：

[root@localhost opt]# pip install mysql-pythonCollecting mysql-python  Using cached MySQL-python-1.2.5.zip    Complete output from command python setup.py egg_info:    sh: mysql_config: command not found    Traceback (most recent call last):      File "
    
     ", line 1, in 
     
            File "/tmp/pip-build-o53eKA/mysql-python/setup.py", line 17, in 
      
               metadata, options = get_config()      File "setup_posix.py", line 43, in get_config        libs = mysql_config("libs_r")      File "setup_posix.py", line 25, in mysql_config        raise EnvironmentError("%s not found" % (mysql_config.path,))    EnvironmentError: mysql_config not found        ----------------------------------------Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-o53eKA/mysql-python/[root@localhost opt]# yum install mysql-devel.x86_64[root@localhost opt]# pip install mysql-pythonCollecting mysql-python  Using cached MySQL-python-1.2.5.zipBuilding wheels for collected packages: mysql-python  Running setup.py bdist_wheel for mysql-python ... done  Stored in directory: /root/.cache/pip/wheels/38/a3/89/ec87e092cfb38450fc91a62562055231deb0049a029054dc62Successfully built mysql-pythonInstalling collected packages: mysql-pythonSuccessfully installed mysql-python-1.2.5[root@localhost opt]# ipythonPython 2.7.8 (default, Oct  4 2016, 17:31:33) Type "copyright", "credits" or "license" for more information.IPython 5.1.0 -- An enhanced Interactive Python.?         -> Introduction and overview of IPython's features.%quickref -> Quick reference.help      -> Python's own help system.object?   -> Details about 'object', use 'object??' for extra details.In [1]: import MySQLdb

转载于:https://www.cnblogs.com/mologa-jie/p/6064779.html

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