将Python虚拟环境添加到Jupyter Notebook中

目的：将利用conda自定义的python虚拟环境添加到jupyter notebook中

1. 创建虚拟环境：conda create -n snp python=3.8.3，并切换到当前虚拟环境下conda activate snp。
2. 安装ipykernel包：conda install ipykernel
3. 添加到Jupyter中：python -m ipykernel install --name snp #后面的环境名字需要更换
4. 重启Jupyter，即可看到添加的虚拟环境

新环境添加成功

5. 切换环境，测试代码（一直显示“服务正在启动，请等待”）的字样，查看命令行发现问题ImportError: DLL load failed while importing error: 找不到指定的模块。进行解决。详细的错误代码如下：

[I 21:59:57.053 NotebookApp] KernelRestarter: restarting kernel (4/5), new random ports
Traceback (most recent call last):
  File "D:\Software\Anaconda3\envs\snp\lib\runpy.py", line 194, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "D:\Software\Anaconda3\envs\snp\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "D:\Software\Anaconda3\envs\snp\lib\site-packages\ipykernel_launcher.py", line 15, in 
    from ipykernel import kernelapp as app
  File "D:\Software\Anaconda3\envs\snp\lib\site-packages\ipykernel\__init__.py", line 2, in 
    from .connect import *
  File "D:\Software\Anaconda3\envs\snp\lib\site-packages\ipykernel\connect.py", line 16, in 
    import jupyter_client
  File "D:\Software\Anaconda3\envs\snp\lib\site-packages\jupyter_client\__init__.py", line 4, in 
    from .connect import *
  File "D:\Software\Anaconda3\envs\snp\lib\site-packages\jupyter_client\connect.py", line 21, in 
    import zmq
  File "D:\Software\Anaconda3\envs\snp\lib\site-packages\zmq\__init__.py", line 55, in 
    from zmq import backend
  File "D:\Software\Anaconda3\envs\snp\lib\site-packages\zmq\backend\__init__.py", line 40, in 
    reraise(*exc_info)
  File "D:\Software\Anaconda3\envs\snp\lib\site-packages\zmq\utils\sixcerpt.py", line 34, in reraise
    raise value
  File "D:\Software\Anaconda3\envs\snp\lib\site-packages\zmq\backend\__init__.py", line 27, in 
    _ns = select_backend(first)
  File "D:\Software\Anaconda3\envs\snp\lib\site-packages\zmq\backend\select.py", line 28, in select_backend
    mod = __import__(name, fromlist=public_api)
  File "D:\Software\Anaconda3\envs\snp\lib\site-packages\zmq\backend\cython\__init__.py", line 6, in 
    from . import (constants, error, message, context,
ImportError: DLL load failed while importing error: 找不到指定的模块。

原因：pyzmq版本不匹配问题，需要卸载旧的，在虚拟环境安装新的版本

解决方法：在虚拟环境下pip uninstall pyzmq，然后pip install pyzmq

卸载重装pyzmq

成功：虚拟环境添加成功。（虽然还是同样的版本）

虚拟环境运行成功