部署Python应用

安装Python 3.7.5

CentOS默认安装的是2.7.5版本的python

[root@iZuf6e3zah39uzoj5pg1myZ ~]# python -V
Python 2.7.5

• 更新成阿里云yum源 cd /etc/yum.repos.d wget http://mirrors.aliyun.com/repo/Centos-7.repo下载阿里云的资源文件 mv CentOS-Base.repo CentOS-Base.repo.bak 修改原有的源备份 mv Centos-7.repo CentOS-Base.repo 把下载的文件重命名 yum clean all yum makecache yum update
• 安装一些依赖（不安装有几率报错） yum -y install zlib-devel bzip2-devel openssl-devel openssl-static ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel libffi-devel lzma gcc yum -y groupinstall "Development tools"
• 下载包 wget https://www.python.org/ftp/python/3.8.5/Python-3.8.5.tgz
• 解压 tar -zvxf Python-3.8.5.tgz cd Python-3.8.5
• 安装到指定目录 ./configure --prefix=/usr/local/sbin/python-3.8.5 make && make install Looking in links: /tmp/tmpf2s9baqm Processing /tmp/tmpf2s9baqm/setuptools-47.1.0-py3-none-any.whl Processing /tmp/tmpf2s9baqm/pip-20.1.1-py2.py3-none-any.whl Installing collected packages: setuptools, pip //需要配置python和pip的软链接 WARNING: The script easy_install-3.8 is installed in '/usr/local/sbin/python-3.8.5/bin' which is not on PATH. Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location. WARNING: The scripts pip3 and pip3.8 are installed in '/usr/local/sbin/python-3.8.5/bin' which is not on PATH. Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location. Successfully installed pip-20.1.1 setuptools-47.1.0
• 修改软链接 [root@iZuf6e3zah39uzoj5pg1myZ bin]# which python /usr/bin/python rm -rf /usr/bin/python [root@iZuf6e3zah39uzoj5pg1myZ ~]# ln -sv /usr/local/sbin/python-3.8.5/bin/python3.8 /usr/bin/python ‘/usr/bin/python’ -> ‘/usr/local/sbin/python-3.8.5/bin/python3.8’ [root@iZuf6e3zah39uzoj5pg1myZ ~]# python -V Python 3.8.5 [root@iZuf6e3zah39uzoj5pg1myZ ~]# which pip /usr/bin/pip [root@iZuf6e3zah39uzoj5pg1myZ bin]# ln -s /usr/local/sbin/python-3.8.5/bin/pip3.8 /usr/bin/pip ln: failed to create symbolic link ‘/usr/bin/pip’: File exists [root@iZuf6e3zah39uzoj5pg1myZ bin]# rm -rf /usr/bin/pip [root@iZuf6e3zah39uzoj5pg1myZ bin]# ln -s /usr/local/sbin/python-3.8.5/bin/pip3.8 /usr/bin/pip [root@iZuf6e3zah39uzoj5pg1myZ bin]# pip -V pip 20.1.1 from /usr/local/sbin/python-3.8.5/lib/python3.8/site-packages/pip (python 3.8)
• 安装完python导致yum命令无法执行的问题 vi /usr/bin/yum 把#! /usr/bin/python修改为#! /usr/bin/python2 vi /usr/libexec/urlgrabber-ext-down #! /usr/bin/python 也要修改为#! /usr/bin/python2

部署文件

• 关于依赖安装的问题，使用批量安装的方式生成依赖清单，多了很多奇奇怪怪的东西，就直接手动使用pip安装了
• 另外，linux系统无法识别模块的问题通过： # Linux下无法识别模块 import sys sys.path.append("/root/BlackFish") 代码结构： BlackFish -blackfish -common Blog.py -itplatform Cnbloggs.py Csdn.py main.py
• 运行main.py nohup python -u main.py & -u：不通过缓存，直接打印（没有延迟）