[Python知识库]mac Big Sur执行python报：dyld: Library not loaded

升级到Big Sur后，执行python报：

dyld: Library not loaded: /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
? Referenced from: /Library/Frameworks/Python.framework/Versions/3.6/Resources/Python.app/Contents/MacOS/Python
? Reason: image not found
Abort trap: 6

在升级到Big Sur前，我把python从2.7升级到了3.6,并在~/.bash_profile有如下配置:

# Setting PATH for Python 3.6

# The original version is saved in .bash_profile.pysave

PATH="/Library/Frameworks/Python.framework/Versions/3.6/bin:${PATH}"

export PATH

alias python="/Library/Frameworks/Python.framework/Versions/3.7/bin/python3.7"

在网上搜了一下 有人说是用brew升级一下就可以，于是我执行：brew upgrade python3

?惊奇地发现，mac Big Sur居然默认就装上了python3.9.6

解决办法：

把~/.bash_profile中升级python3.6时的配置给注释后 source?~/.bash_profile就解决了这个问题