1. Jupyter notebook 在 Anaconda 更新后无法打开

参考办法：github+最新版jupyter无法打开怎么办

启动 jupyter notebook 报错：

Traceback (most recent call last):
  File "/Users/heqin/anaconda3/bin/jupyter-notebook", line 7, in <module>
    from notebook.notebookapp import main
  File "/Users/heqin/anaconda3/lib/python3.6/site-packages/notebook/notebookapp.py", line 46, in <module>
    from zmq.eventloop import ioloop
  File "/Users/heqin/anaconda3/lib/python3.6/site-packages/zmq/__init__.py", line 47, in <module>
    from zmq import backend
  File "/Users/heqin/anaconda3/lib/python3.6/site-packages/zmq/backend/__init__.py", line 40, in <module>
    reraise(*exc_info)
  File "/Users/heqin/anaconda3/lib/python3.6/site-packages/zmq/utils/sixcerpt.py", line 34, in reraise
    raise value
  File "/Users/heqin/anaconda3/lib/python3.6/site-packages/zmq/backend/__init__.py", line 27, in <module>
    _ns = select_backend(first)
  File "/Users/heqin/anaconda3/lib/python3.6/site-packages/zmq/backend/select.py", line 26, in select_backend
    mod = __import__(name, fromlist=public_api)
  File "/Users/heqin/anaconda3/lib/python3.6/site-packages/zmq/backend/cython/__init__.py", line 6, in <module>
    from . import (constants, error, message, context,
ImportError: dlopen(/Users/heqin/anaconda3/lib/python3.6/site-packages/zmq/backend/cython/error.cpython-36m-darwin.so, 2): Library not loaded: @rpath/libsodium.23.dylib
  Referenced from: /Users/heqin/anaconda3/lib/libzmq.5.dylib
  Reason: image not found

重新安装下zeromq

参考办法推荐先卸载再安装，我觉得本身问题就是由于更新引起的，于是直接 install, 让它自动更新就行，会发现 libsodium 这个报错的库也一并更新了。

heqin@heqindeMacBook-Pro:~$conda install zeromq
Solving environment: done

## Package Plan ##

  environment location: /Users/heqin/anaconda3

  added / updated specs:
    - zeromq


The following packages will be downloaded:

    package                    |            build
    ---------------------------|-----------------
    zeromq-4.2.5               |       h0a44026_0         495 KB

The following packages will be UPDATED:

    libsodium: 1.0.13-hba5e272_2 --> 1.0.16-h3efe00b_0
    zeromq:    4.2.3-h378b8a2_3  --> 4.2.5-h0a44026_0

Proceed ([y]/n)? y


Downloading and Extracting Packages
zeromq-4.2.5         |  495 KB | ####################################### | 100%
Preparing transaction: done
Verifying transaction: done
Executing transaction: done

2. 待续