python3报错：ModuleNotFoundError: No module named ‘Crypto.Cipher‘

1、问题

win10 上 执行 python 脚本，然后报错了，提示 ModuleNotFoundError: No module named 'Crypto.Cipher'，如下面所示：

Traceback (most recent call last):
  File "D:\study\Python\gradio\main.py", line 6, in 
    from Crypto.Cipher import AES
ModuleNotFoundError: No module named 'Crypto.Cipher'

解决方案：

1、安装Crypto 模块，执行 pip install Crypto ，安装成功后，再执行命令，还是报上面的错误。

2、然后又安装命令 pip install Crypto.Cipher ，安装成功，信息如下：

(venv) D:\study\Python\gradio>pip install Crypto.Cipher
Collecting Crypto.Cipher
  Downloading Crypto.Cipher-1-py3-none-any.whl (1.3 kB)
Requirement already satisfied: requests in d:\study\gradio\venv\lib\site-packages (from Crypto.Cipher) (2.31.0)
Requirement already satisfied: charset-normalizer<4,>=2 in d:\study\gradio\venv\lib\site-packages (from requests->Crypto.Cipher) (3.2.0)
Requirement already satisfied: idna<4,>=2.5 in d:\study\gradio\venv\lib\site-packages (from requests->Crypto.Cipher) (3.4)
Requirement already satisfied: urllib3<3,>=1.21.1 in d:\study\gradio\venv\lib\site-packages (from requests->Crypto.Cipher) (2.0.3)
Requirement already satisfied: certifi>=2017.4.17 in d:\study\gradio\venv\lib\site-packages (from requests->Crypto.Cipher) (2023.5.7)
Installing collected packages: Crypto.Cipher
Successfully installed Crypto.Cipher-1

3、运行还是报错：

Traceback (most recent call last):
  File "D:\study\Python\gradio\main.py", line 6, in 
    from Crypto.Cipher import AES
ModuleNotFoundError: No module named 'Crypto.Cipher'

4、第1步： 在python3 （或者 python 虚拟环境）目录下的 /Lib/site-packages/ 目录下找到 crypto 、crypto-1.4.1.dist-info 目录，将crypto 首字母改为大写，即修改名称为 Crypto、 Crypto-1.4.1.dist-info 。（如果没有 crypto 、crypto-1.4.1.dist-info 目录，则先执行安装 pip install Crypto 。）

5、检查目录下没有 pycryptodome 模块，如果没有，则安装 pycryptodome。

pip install  pycryptodome

 6、然后再运行脚本时，就不会报错了。