Why does the 'lib' module lack the 'X509_FLAG_CB_ISSUER_CHECK' attribute?

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Why does the 'lib' module lack the 'X509_FLAG_CB_ISSUER_CHECK' attribute?

在Windows 11上启动Jupyter Notebook时遇到错误，可能是以下原因：

1. 环境问题：确保你的Anaconda环境已正确安装，并且Jupyter Notebook已经安装在该环境中。

2.权限问题：尝试以管理员身份运行命令提示符或Anaconda Prompt。

3.版本冲突：检查Anaconda和Jupyter Notebook的版本是否兼容。

解决步骤：

1.打开Anaconda Prompt。

2.输入以下命令检查Jupyter Notebook是否安装：

conda list

3.如果未安装，使用以下命令安装：

conda install jupyter

4.尝试重新启动Jupyter Notebook：

jupyter notebook

windows11启动报错======

Traceback (most recent call last):

File "D:\Anaconda3-5.3.1-Windows-x86_64\Scripts\jupyter-notebook-script.py", line 6, in <module>

from notebook.notebookapp import main

File "D:\Anaconda3-5.3.1-Windows-x86_64\lib\site-packages\notebook\notebookapp.py", line 82, in <module>

from .services.contents.manager import ContentsManager

File "D:\Anaconda3-5.3.1-Windows-x86_64\lib\site-packages\notebook\services\contents\manager.py", line 17, in <module>

from nbformat import sign, validate as validate_nb, ValidationError

File "D:\Anaconda3-5.3.1-Windows-x86_64\lib\site-packages\nbformat\__init__.py", line 33, in <module>

from .validator import validate, ValidationError

File "D:\Anaconda3-5.3.1-Windows-x86_64\lib\site-packages\nbformat\validator.py", line 12, in <module>

from jsonschema import ValidationError

File "D:\Anaconda3-5.3.1-Windows-x86_64\lib\site-packages\jsonschema\__init__.py", line 18, in <module>

from jsonschema.validators import (

File "D:\Anaconda3-5.3.1-Windows-x86_64\lib\site-packages\jsonschema\validators.py", line 8, in <module>

import requests

File "D:\Anaconda3-5.3.1-Windows-x86_64\lib\site-packages\requests\__init__.py", line 95, in <module>

from urllib3.contrib import pyopenssl

File "D:\Anaconda3-5.3.1-Windows-x86_64\lib\site-packages\urllib3\contrib\pyopenssl.py", line 46, in <module>

import OpenSSL.SSL

File "D:\Anaconda3-5.3.1-Windows-x86_64\lib\site-packages\OpenSSL\__init__.py", line 8, in <module>

from OpenSSL import crypto, SSL

File "D:\Anaconda3-5.3.1-Windows-x86_64\lib\site-packages\OpenSSL\crypto.py", line 1550, in <module>

class X509StoreFlags(object):

File "D:\Anaconda3-5.3.1-Windows-x86_64\lib\site-packages\OpenSSL\crypto.py", line 1570, in X509StoreFlags

CB_ISSUER_CHECK = _lib.X509_-_FLAG_CB_ISSUER_CHECK

AttributeError: module 'lib' has no attribute 'X509_V_FLAG_CB_ISSUER_CHECK'

解决办法：======

pip uninstall pyOpenSSL

pip install pyOpenSSL

问题解决。

标签：Module lib has Attribute X509