bug

[ljchang]

When using a different mask to load Brain_Data, you can't get a summary of the variable due to a bug in repr. Should be easy to fix.

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
File [/opt/anaconda3/envs/pyfeatlive/lib/python3.11/site-packages/IPython/core/formatters.py:708](http://localhost:8888/opt/anaconda3/envs/pyfeatlive/lib/python3.11/site-packages/IPython/core/formatters.py#line=707), in PlainTextFormatter.__call__(self, obj)
    701 stream = StringIO()
    702 printer = pretty.RepresentationPrinter(stream, self.verbose,
    703     self.max_width, self.newline,
    704     max_seq_length=self.max_seq_length,
    705     singleton_pprinters=self.singleton_printers,
    706     type_pprinters=self.type_printers,
    707     deferred_pprinters=self.deferred_printers)
--> 708 printer.pretty(obj)
    709 printer.flush()
    710 return stream.getvalue()

File [/opt/anaconda3/envs/pyfeatlive/lib/python3.11/site-packages/IPython/lib/pretty.py:410](http://localhost:8888/opt/anaconda3/envs/pyfeatlive/lib/python3.11/site-packages/IPython/lib/pretty.py#line=409), in RepresentationPrinter.pretty(self, obj)
    407                         return meth(obj, self, cycle)
    408                 if cls is not object \
    409                         and callable(cls.__dict__.get('__repr__')):
--> 410                     return _repr_pprint(obj, self, cycle)
    412     return _default_pprint(obj, self, cycle)
    413 finally:

File [/opt/anaconda3/envs/pyfeatlive/lib/python3.11/site-packages/IPython/lib/pretty.py:778](http://localhost:8888/opt/anaconda3/envs/pyfeatlive/lib/python3.11/site-packages/IPython/lib/pretty.py#line=777), in _repr_pprint(obj, p, cycle)
    776 """A pprint that just redirects to the normal repr function."""
    777 # Find newlines and replace them with p.break_()
--> 778 output = repr(obj)
    779 lines = output.splitlines()
    780 with p.group():

File [/opt/anaconda3/envs/pyfeatlive/lib/python3.11/site-packages/nltools/data/brain_data.py:325](http://localhost:8888/opt/anaconda3/envs/pyfeatlive/lib/python3.11/site-packages/nltools/data/brain_data.py#line=324), in Brain_Data.__repr__(self)
    318 def __repr__(self):
    319     return "%s.%s(data=%s, Y=%s, X=%s, mask=%s)" % (
    320         self.__class__.__module__,
    321         self.__class__.__name__,
    322         self.shape(),
    323         self.Y.shape,
    324         self.X.shape,
--> 325         os.path.basename(self.mask.get_filename()),
    326     )

File <frozen posixpath>:142, in basename(p)

TypeError: expected str, bytes or os.PathLike object, not NoneType