Working fine with versions as of Aug 20, with the port self update on Sept 1, the following occurs.
Going back to previous /opt/local/Library/Frameworks/Python.framework/Versions the same command works fine.
Here is the error using the Sept 1 macports with the same install
[mac35:Research/CalWater2015/G4_frd] ngaggini% ipython notebook
Traceback (most recent call last):
File "/opt/local/bin/ipython", line 5, in <module>
start_ipython()
File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/IPython/__init__.py", line 118, in start_ipython
return launch_new_instance(argv=argv, **kwargs)
File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/traitlets/config/application.py", line 591, in launch_instance
app.initialize(argv)
File "<string>", line 2, in initialize
File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/traitlets/config/application.py", line 75, in catch_config_error
return method(app, *args, **kwargs)
File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/IPython/terminal/ipapp.py", line 305, in initialize
super(TerminalIPythonApp, self).initialize(argv)
File "<string>", line 2, in initialize
File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/traitlets/config/application.py", line 75, in catch_config_error
return method(app, *args, **kwargs)
File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/IPython/core/application.py", line 386, in initialize
self.parse_command_line(argv)
File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/IPython/terminal/ipapp.py", line 300, in parse_command_line
return super(TerminalIPythonApp, self).parse_command_line(argv)
File "<string>", line 2, in parse_command_line
File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/traitlets/config/application.py", line 75, in catch_config_error
return method(app, *args, **kwargs)
File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/traitlets/config/application.py", line 487, in parse_command_line
return self.initialize_subcommand(subc, subargv)
File "<string>", line 2, in initialize_subcommand
File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/traitlets/config/application.py", line 75, in catch_config_error
return method(app, *args, **kwargs)
File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/traitlets/config/application.py", line 418, in initialize_subcommand
subapp = import_item(subapp)
File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/ipython_genutils/importstring.py", line 31, in import_item
module = __import__(package, fromlist=[obj])
ImportError: No module named 'notebook'
Since version 4.0.0 (aka Big Split) IPython no longer support notebook (IPython was renamed to Jupyter and splitted to a bunch of smaller packages) . To enable notebook support please install appropriate py-notebook package or use meta-package py-jupyter. This issue was mentioned in upgrade notes (if you read them).