将python3.5.2安装到ubuntu 16.04中

Question

我想将python版本从3.6更改为3.5。 我在ubuntu16.04上安装了python3.5。但它不在usr/bin中 我执行了update-alternatives --display python3

    python3 - auto mode
  link best version is /usr/bin/python3.6
  link currently points to /usr/bin/python3.6
  link python3 is /usr/bin/python3
/usr/bin/python3.6 - priority 3
/usr/local/lib/python3.5 - priority 1
/usr/local/lib/python3.6 - priority 2

但我执行python3 -V

^{pr2}$

当我试图用pip安装一些软件包时

pip install pymysql


-bash: /home/ubuntu/.local/bin/pip: /usr/bin/python3: bad interpreter: Permission denied

我想在计算机上正确安装Python3.5.2并将其设置为默认版本。在

Answer 1

1）安装预先要求

sudo apt-get install build-essential checkinstall

sudo apt-get install libreadline-gplv2-dev libncursesw5-dev libssl-dev libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-dev

2）移动到src文件夹，得到python3.5.2的tar

^{pr2}$

3）现在提取系统上下载的存档文件。在

sudo tar xzf Python-3.5.2.tgz

4）使用alInstall编译源代码

cd Python-3.5.2

sudo ./configure  enable-optimizations

sudo make altinstall

5）检查安装

python3.5 -V