Centos 7 x86_64 环境Python2.7升级Python3.7.4

升级Python3.7.4

#安装补丁包
yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc  libffi-devel
#下载文件 
wget https://www.python.org/ftp/python/3.7.4/Python-3.7.4.tgz 
#解压 
tar zxf Python-3.7.4.tgz 
#编译
cd Python-3.7.4
./configure --prefix=/usr/local/python3.7
#安装
make && make install
#添加环境变量
PATH=$PATH:$HOME/bin:/usr/local/python3.7/bin
#更新python默认指向为python3.7
mv /usr/bin/python /usr/bin/python.bak
ln -s /usr/local/bin/python3.7/ usr/bin/python

安装pip

#安装pip
wget https://bootstrap.pypa.io/get-pip.py
python get-pip.py

常见问题：

1.3.7版本需要两个新的包libffi-devel和zlib-deve，安装此包之后再次进行编译安装即可。

yum install libffi-devel -y
yum -y install zlib zlib-deve

 2.yum失败

[root@elegant-codes-3 home]# yum
  File "/usr/bin/yum", line 30
    except KeyboardInterrupt, e

处理方法：版本修改为2.7

vi /usr/libexec/urlgrabber-ext-down
vi /usr/bin/yum-config-manager
vi /usr/bin/yum

3.pip命令-bash: pip: command not found

处理方法：新增PATH

vi ~/.bashrc
#末尾新增
PATH=$PATH:$HOME/bin:/usr/local/python3.7/bin
source ~/.bashrc