Jupyter server cannot start

Running `jupyter notebook` results in the following error:

```
ImportError: dlopen(/usr/local/Cellar/python/3.7.3/Frameworks/Python.framework/Versions/3.7/lib/python3.7/lib-dynload/_ssl.cpython-37m-darwin.so, 2): Library not loaded: /usr/local/opt/openssl/lib/libssl.1.0.0.dylib
Referenced from: /usr/local/Cellar/python/3.7.3/Frameworks/Python.framework/Versions/3.7/lib/python3.7/lib-dynload/_ssl.cpython-37m-darwin.so
Reason: image not found
```

I'm not totally sure what I've changed. It looks like a PATH issue? Other users on this machine can use the command. I've tried some other virtual environments and uninstalling and reinstalling notebook, all with the same error. I've also tried:

`brew uninstall --ignore-dependencies openssl`
`brew install openssl`

to no avail. Any help is appreciated!

Start by reproducing `jupyter notebook` and reading the reported ImportError for `_ssl.cpython-37m-darwin.so` and the missing `/usr/local/opt/openssl/lib/libssl.1.0.0.dylib`. Compare the Python, virtual-environment, and Homebrew paths involved; done means the Jupyter server starts successfully on this machine.

Written by the indexing model from the issue text.