import _ctypes ImportError: dlopen(/.../lib-dynload/_ctypes.cpython-37m-darwin.so, 2) 報錯解決

 import _ctypes
ImportError: dlopen(/Users/suki570/anaconda3/lib/python3.7/lib-dynload/_ctypes.cpython-37m-darwin.so, 2): Library not loaded: @rpath/libffi.6.dylib
  Referenced from: /Users/suki570/anaconda3/lib/python3.7/lib-dynload/_ctypes.cpython-37m-darwin.so
  Reason: image not found

MacOS Catalina系統版本，原因是更新了conda導致不同版本的庫無法鏈接。cd到目錄/Users/suki570/anaconda3/lib下執行

ln -s libffi.7.dylib libffi.6.dylib

即可解決。

參考：Conda update/install not working !