jupyter-2.7 vs. ipython

[Robert Goldman]

I can't tell if this is a bug in MacPorts, or if I have simply 
misconfigured something.

When I start up `ipython notebook`, with python-2.7 as my selected 
python, everything works fine, but I get a complaint echoed to the 
shell:

```
[TerminalIPythonApp] WARNING | Subcommand `ipython notebook` is 
deprecated and will be removed in future versions.
[TerminalIPythonApp] WARNING | You likely want to use `jupyter notebook` 
in the future
```

All works well, nevertheless, and I'm happy, except for the crabby note 
from ipython.

But, if I try to do what the message says, and run `jupyter notebook` 
instead, I get an error:

```
$ jupyter-2.7 notebook
Traceback (most recent call last):
   File 
"/opt/local/Library/Frameworks/Python.framework/Versions/2.7/bin/jupyter-notebook", 
line 6, in <module>
     from pkg_resources import load_entry_point
   File 
"/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pkg_resources/__init__.py", 
line 3195, in <module>
     @_call_aside
   File 
"/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pkg_resources/__init__.py", 
line 3179, in _call_aside
     f(*args, **kwargs)
   File 
"/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pkg_resources/__init__.py", 
line 3208, in _initialize_master_working_set
     working_set = WorkingSet._build_master()
   File 
"/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pkg_resources/__init__.py", 
line 681, in _build_master
     ws.require(__requires__)
   File 
"/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pkg_resources/__init__.py", 
line 999, in require
     needed = self.resolve(parse_requirements(requirements))
   File 
"/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pkg_resources/__init__.py", 
line 885, in resolve
     raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'futures' distribution was not 
found and is required by tornado
```

So I was wondering if there's an issue with jupyter or, if somehow I've 
gotten things misconfigured.

Thanks
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