我已经在Xcode(Version 12.4 (12D4e))里面配置好了python3环境
但是很多包找不到：
Traceback (most recent call last):
File "sigma4_0.py", line 3, in <module>
import sympy
ModuleNotFoundError: No module named 'sympy'
Program ended with exit code: 1
请问如何手动安装这些包到Xcode里面？谢谢～

电脑是 MacBook Pro 16, 1 Late2019
系统是 macOS Big Sur 11.2