现象
之前在Mac上进行运行的程序突然不行了，报错提示ModuleNotFoundError: No module named 'Cryptodome'。
www:edm user$ python3.6 crawl.py
Traceback (most recent call last):
File "crawl.py", line 9, in <module>
from Cryptodome.Cipher import AES
ModuleNotFoundError: No module named 'Cryptodome'尝试安装Cryptodome，不对！
www:edm user$ pip3.6 install Cryptodome
Collecting Cryptodome
Could not find a version that satisfies the requirement Cryptodome (from versions: )
No matching distribution found for Cryptodome
You are using pip version 9.0.1, however version 10.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
www:edm user$ pip3.6 install --upgrade pip3.6
Collecting pip3.6
Could not find a version that satisfies the requirement pip3.6 (from versions: )
No matching distribution found for pip3.6
You are using pip version 9.0.1, however version 10.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
Google到了应该安装这个pycryptodomex，重新安装提示已经存：
www:edm user$ pip3.6 install pycryptodomex
Requirement already satisfied: pycryptodomex in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages
You are using pip version 9.0.1, however version 10.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.解决办法
进入site-packages 里面，发现存在两个不同版本的这个项目
drwxr-xr-x 7 www admin 238 9 9 2017 pycryptodome-3.4.7-py3.6.egg-info
drwxr-xr-x 7 www admin 238 9 9 2017 pycryptodomex-3.4.7-py3.6.egg-info删除那些所有以这个开头的，然后在重新安装问题解决
cd /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages
rm -rf pycryptodome*遗留问题
但是为何之前OK的会突然报错不存在呢？
如果您有解答，欢迎交流 [email protected]