新的已经安装了一个包envs安装时显示Requirement already satisfied。 指定安装位置：

pip install --target=/home/anaconda3/envs/envs名字/lib/python3.8/site-packages 包名 

(new_envs) cy@qwer-PR4764GW:~/baseline$ pip install sympy Requirement already satisfied: sympy in /usr/local/anaconda3/lib/python3.7/site-packages (1.4) Requirement already satisfied: mpmath>=0.19 in /usr/local/anaconda3/lib/python3.7/site-packages (from sympy) (1.1.0) (new_envs) cy@qwer-PR4764GW:~/baseline$ pip install --target=/home/cy/anaconda3/envs/new_envs/lib/python3.8/site-packages sympy Collecting sympy   Downloading https://files.pythonhosted.org/packages/d0/04/66be21ceb305c66a4b326b0ae44cc4f027a43bc08cac204b48fb45bb3653/sympy-1.10.1-py3-none-any.whl (6.4MB)      |████████████████████████████████| 6.4MB 970kB/s  Collecting mpmath>=0.19 (from sympy)   Downloading https://files.pythonhosted.org/packages/d4/cf/3965bddbb4f1a61c49aacae0e78fd1fe36b5dc36c797b31f30cf07dcbbb7/mpmath-1.2.1-py3-none-any.whl (532kB)      |████████████████████████████████| 542kB 12.0MB/s  Installing collected packages: mpmath, sympy Successfully installed mpmath-1.2.1 sympy-1.10.1