Homebrew + venv 虚拟环境安装SCIP

1、安装homebrew

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

会默认Downloading Command Line Tools for Xcode

但是最后会

fatal: unable to access 'https://github.com/Homebrew/brew/': Failed to connect to github.com port 443 after 75013 ms: Couldn't connect to server
Warning: Trying again in 2 seconds: /usr/bin/git fetch --quiet --progress --force origin
fatal: unable to access 'https://github.com/Homebrew/brew/': Failed to connect to github.com port 443 after 75007 ms: Couldn't connect to server

所以用镜像站安装 Homebrew（不依赖 GitHub），切换清华源，来安装brew

git clone https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/brew.git ~/homebrew
echo 'eval "$(/Users/$(whoami)/homebrew/bin/brew shellenv)"' >> ~/.zprofile
eval "$(/Users/$(whoami)/homebrew/bin/brew shellenv)"

然后测试

brew --version

显示 Homebrew 4.6.0-16-g98384bb

2、创建虚拟环境

python3 -m venv pyomo_env

python本身 不会自动管理所有虚拟环境的列表，虚拟环境就是一个 独立目录：（1）就在当前目录下看有多少个；（2）pycharm能识别多个环境

没有指定路径时，虚拟环境目录就会被创建在你当时所在的“当前工作目录”中，我的是 /Users/didi

 

进入并激活虚拟环境

source pyomo_env/bin/activate

它会：

• 修改你的终端环境变量

• 把当前的 Python 和 pip 都切换成虚拟环境中的版本

此时你可以看到终端前缀会变成这样：

(pyomo_env) bogon:~ didi$ pip install pyomo

这表示你已经「激活」了名为 pyomo_env 的虚拟环境。

---

📌 激活后你才能做的事：

• 用 pip install 安装包时，只会装到 pyomo_env 里

• 运行的 python 是虚拟环境里的，不是系统的 Python

• 所有 Pyomo、SCIP、Matplotlib、Pandas……等包都能按需管理、随时删掉不影响全局

---

🚪退出虚拟环境

如果你以后不想用了，运行：

deactivate

即可退出虚拟环境，回到系统默认 Python。

3、安装pyomo

pip install --upgrade pip
pip install pyomo

还需要安装其他包

4、使用homebrew安装scip

brew install scip

一直会报错

curl: (28) Failed to connect to github.com port 443 after 75008 ms: Couldn't connect to server                                                               
Warning: Problem : timeout. Will retry in 1 seconds. 3 retries left.
curl: (28) Failed to connect to github.com port 443 after 75020 ms: Couldn't connect to server                                                   #    #  ##  
Warning: Problem : timeout. Will retry in 2 seconds. 2 retries left.
curl: (28) Failed to connect to github.com port 443 after 75018 ms: Couldn't connect to server  #           #          #                                     
Warning: Problem : timeout. Will retry in 4 seconds. 1 retries left.
curl: (28) Failed to connect to github.com port 443 after 75013 ms: Couldn't connect to server                                                               

Error: scip: Failed to download resource "9ac89e9936b826c13e90611cb9a81a7aa0508d20.patch?full_index=1"
Download failed: https://github.com/boostorg/range/commit/9ac89e9936b826c13e90611cb9a81a7aa0508d20.patch?full_index=1
==> No outdated dependents to upgrade!

主要原因是：当前网络环境无法连接 GitHub，而我通过chrome是能访问Github的。

主要原因是：浏览器和终端走的网络路径不一样，因此我们需要让终端的流量也走代理，即可正常安装（clashX都是如下IP）

export http_proxy=http://127.0.0.1:7890
export https_proxy=http://127.0.0.1:7890
brew install scip

确认安装路径

which scip

在当前虚拟环境中

scip --version 能看到版本

确认能运行：

scip

你会进入交互模式（输入 quit 可退出）。