我的机器上安装了两个版本的Python(版本2.6和2.5).我想为一个项目运行2.6,为另一个项目运行2.5.
如何指定要使用的内容？
我正在使用Windows XP SP2.
我在macOS Sierra上有2.7.13,我正在尝试升级到python3 via
brew install python3
除了最后一部分,一切似乎都很顺利:
==> Installing python3
==> Downloading https://homebrew.bintray.com/bottles/python3-3.6.1.sierra.bottle
######################################################################## 100.0%
==> Pouring python3-3.6.1.sierra.bottle.tar.gz
==> Using the sandbox
==> /usr/local/Cellar/python3/3.6.1/bin/python3 -s setup.py --no-user-cfg instal
==> /usr/local/Cellar/python3/3.6.1/bin/python3 -s setup.py --no-user-cfg instal
==> /usr/local/Cellar/python3/3.6.1/bin/python3 -s setup.py --no-user-cfg instal
==> Caveats
Pip, setuptools, and wheel have been installed. To update them
pip3 install --upgrade pip setuptools wheel
You can install Python packages with
pip3 install <package>
They will install into the site-package directory
/usr/local/lib/python3.6/site-packages
See: http://docs.brew.sh/Homebrew-and-Python.html
==> Summary
/usr/local/Cellar/python3/3.6.1: …