linux下python相关命令

若本机已安装python2，尽量不要动现有的python2，额外安装python3即可。

1.安装python3.6（centos下安装python3自带pip和setuptools）

# 安装依赖环境yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel[root@ipha-dev71-1 python3]# cd /usr/local/python3   # 我的python3.6安装路径，如果没有python3目录应事先创建# 依次执行如下命令[root@ipha-dev71-1 python3]# wget https://www.python.org/ftp/python/3.6.1/Python-3.6.1.tgz[root@ipha-dev71-1 python3]# tar -zxvf Python-3.6.1.tgz

[root@ipha-dev71-1 python3]# /configure --prefix=/usr/local/python3   # 指定安装路径

[root@ipha-dev71-1 python3]# make

[root@ipha-dev71-1 python3]# make install

[root@ipha-dev71-1 python3]# ln -s /usr/local/python3/bin/python3 /usr/bin/python3   # 建立软链接，同windows下的桌面快捷方式，可在/usr/bin 下可查看软连接

[root@ipha-dev71-1 bin]# vim ~/.bash_profile   # 配置环境变量，~/.bash_profile指用户变量，/etc/profile指系统变量

添加如下内容

# Get the aliases and functions
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi

# User specific environment and startup programs

PATH=$PATH:$HOME/bin:/usr/local/python3/bin

export PATH

[root@ipha-dev71-1 bin]# source ~/.bash_profile  # 使环境变量生效[root@ipha-dev71-1 bin]# # ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3 # 为pip3也创建软连接# 检测是否安装成功

  [root@ipha-dev71-1 bin]# python3 -V
   Python 3.6.1
  [root@ipha-dev71-1 bin]# pip3 -V
   pip 19.2.1 from /usr/local/python3/lib/python3.6/site-packages/pip (python 3.6)

 2.安装第三方库（这里仅举个例子，其他第三方库可在用到时再进行安装）

[root@ipha-dev71-1 bin]# pip3 install configparser
Collecting configparser
  Downloading https://files.pythonhosted.org/packages/09/4c/5e3ddf3cf1b457a25d48dc7253d0887c1037d79881942df5edd99cec4aca/configparser-3.7.5-py2.py3-none-any.whl
Installing collected packages: configparser
Successfully installed configparser-3.7.5

 

来源：https://www.cnblogs.com/wang-mengmeng/p/11335787.html