python解释器的安装;python2与python3同时在环境变量中时的解决方案

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python解释器的安装;python2与python3同时在环境变量中时的解决方案

ABO在安装python3.6和python2.7的解释器时遇到了一些问题,记录在这里

解释器下载地址https://www.python.org/downloads/,打开之后选择需要的版本并进行下载;
这里ABO同时下载了3.6和2.7两个版本;

3.6安装

如下图,双击安装程序
python解释器的安装;python2与python3同时在环境变量中时的解决方案

  • 此时建议勾选Add Python 3.6 to PATH(将python3.6添加到环境变量;
  • 默认的python解释器安装路径如上图中框起来的地方,如果想要自己定义的话,选择Customize installation;(ABO有强迫症,更改了安装路径)

更改了安装路径的继续向下看,默认安装路径为C盘的跳过该部分即可;

  • 全部默认即可
    python解释器的安装;python2与python3同时在环境变量中时的解决方案
  • 更改安装路径,然后install
    python解释器的安装;python2与python3同时在环境变量中时的解决方案
  • 安装进程结束后,不用管disable path length limit的选项,close窗口,测试如下:
    python解释器的安装;python2与python3同时在环境变量中时的解决方案
    因为安装的过程中已经Add Python 3.6 to PATH,所以不需要额外设置环境变量

2.7安装

与python3.6的安装类似,打开安装程序,next到下图选择安装路径处(ABO再一次没有选择默认的路径):
python解释器的安装;python2与python3同时在环境变量中时的解决方案

  • 下一个窗口中,勾选最后一个将python2.7添加到环境变量的选项
    python解释器的安装;python2与python3同时在环境变量中时的解决方案

  • next至安装结束。

环境变量之间的冲突

同时安装了python2.7与python3.6之后,遇到了这样一个问题:
python解释器的安装;python2与python3同时在环境变量中时的解决方案
由于python3.6和python2.7均运用了环境变量python,因此先安装的python3.6就覆盖了python2.7


那么如何使用python2.7呢?

  • 首先当然可以输入python2.7完整的安装路径,如下图:
    python解释器的安装;python2与python3同时在环境变量中时的解决方案
  • 另外,简单的将python2.7与python3.6安装目录下的python.exe区分开即可;
    • 如下图,将python2.7安装目录下的python.exe重命名为了python2.exe而python3.6目录下的python.exe不变。
      python解释器的安装;python2与python3同时在环境变量中时的解决方案

再进行测试,此时已经可以很容易的分别python2.7与python3.6的解释器了
python解释器的安装;python2与python3同时在环境变量中时的解决方案

2017-2-16 19:12;59

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