从零开始搭建pcrjjcbot

首先准备一台Centos7的国外主机

将系统自带的python2.7更换成python3.8

Centos7安装python3.8详细教程

  1. 安装编译相关工具

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    yum -y groupinstall "Development tools"
    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
    yum install libffi-devel -y

  2. 下载python安装包

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    wget https://www.python.org/ftp/python/3.8.3/Python-3.8.3.tgz
    tar -zxvf  Python-3.8.3.tgz

  3. 编译安装python

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    mkdir /usr/local/python3 #创建编译安装目录
    cd Python-3.8.3
    ./configure --prefix=/usr/local/python3
    make && make install

    安装过,出现下面两行就成功了

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    Installing collected packages: setuptools, pip
    Successfully installed pip-19.2.3 setuptools-41.2.0

  4. 创建软连接

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    # 查看当前python软连接
    ll /usr/bin/ |grep python
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    lrwxrwxrwx    1 root root           7 Nov 26  2018 python -> python2
    lrwxrwxrwx    1 root root           9 Nov 26  2018 python2 -> python2.7
    -rwxr-xr-x      1 root root        7216 Jul 13  2018 python2.7

    默认系统安装的是python2.7

    删除python软连接

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    rm -rf /usr/bin/python

    配置软连接为python3

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    #添加python3的软链接 
    ln -s /usr/local/python3/bin/python3 /usr/bin/python

    这个时候看下python默认版本

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    python -V #这里用的是大V

    删除默认的pip软连接,并添加pip3新的软连接

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    rm -rf /usr/bin/pip
    #添加 pip3 的软链接 
    ln -s /usr/local/python3/bin/pip3 /usr/bin/pip

    更改yum配置

    因为yum要用到python2.7才能执行,否则会导致yum不能正常使用(不管安装python3的哪个版本,都必须要更改以下配置)

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    vi /usr/bin/yum 
    把 #! /usr/bin/python 修改为 #! /usr/bin/python2 
    vi /usr/libexec/urlgrabber-ext-down 
    把 #! /usr/bin/python 修改为 #! /usr/bin/python2
    vi /usr/bin/yum-config-manager
    #!/usr/bin/python 改为 #!/usr/bin/python2