str(tick library) fails in IPython about arctic HOT 2 CLOSED

In [1]: from arctic import Arctic
In [2]: store = Arctic('localhost')
In [3]: store.initialize_library('library_name', 'TickStoreV3')
In [4]: store['library_name']
Out[4]: ---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
//anaconda/envs/py27/lib/python2.7/site-packages/IPython/core/formatters.pyc in __call__(self, obj)
    695                 type_pprinters=self.type_printers,
    696                 deferred_pprinters=self.deferred_printers)
--> 697             printer.pretty(obj)
    698             printer.flush()
    699             return stream.getvalue()

//anaconda/envs/py27/lib/python2.7/site-packages/IPython/lib/pretty.pyc in pretty(self, obj)
    381                             if callable(meth):
    382                                 return meth(obj, self, cycle)
--> 383             return _default_pprint(obj, self, cycle)
    384         finally:
    385             self.end_group()

//anaconda/envs/py27/lib/python2.7/site-packages/IPython/lib/pretty.pyc in _default_pprint(obj, p, cycle)
    501     if _safe_getattr(klass, '__repr__', None) not in _baseclass_reprs:
    502         # A user-provided repr. Find newlines and replace them with p.break_()
--> 503         _repr_pprint(obj, p, cycle)
    504         return
    505     p.begin_group(1, '<')

//anaconda/envs/py27/lib/python2.7/site-packages/IPython/lib/pretty.pyc in _repr_pprint(obj, p, cycle)
    683     """A pprint that just redirects to the normal repr function."""
    684     # Find newlines and replace them with p.break_()
--> 685     output = repr(obj)
    686     for idx,output_line in enumerate(output.splitlines()):
    687         if idx:

//anaconda/envs/py27/lib/python2.7/site-packages/arctic/tickstore/tickstore.pyc in __repr__(self)
    107
    108     def __repr__(self):
--> 109         return str(self)
    110
    111     def delete(self, symbol, date_range=None):

//anaconda/envs/py27/lib/python2.7/site-packages/arctic/tickstore/tickstore.pyc in __str__(self)
    104     def __str__(self):
    105         return """<%s at %s>
--> 106 %s""" % (self.__class__.__name__, hex(id(self)), indent(str(self._arctic_lib), 4))
    107
    108     def __repr__(self):

NameError: global name 'indent' is not defined