Closed
Description
I ran into this when I accidentally passed my codes to the ordered argument
Code Sample, a copy-pastable example if possible
In [2]: pd.Categorical.from_codes([0, 0, 1], categories=['a', 'b', 'c'], ordered=np.array([0, 1, 2]))
Out[2]: ---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
/Users/tom.augspurger/Envs/py3/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj)
668 type_pprinters=self.type_printers,
669 deferred_pprinters=self.deferred_printers)
--> 670 printer.pretty(obj)
671 printer.flush()
672 return stream.getvalue()
/Users/tom.augspurger/Envs/py3/lib/python3.5/site-packages/IPython/lib/pretty.py 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()
/Users/tom.augspurger/Envs/py3/lib/python3.5/site-packages/IPython/lib/pretty.py 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, '<')
/Users/tom.augspurger/Envs/py3/lib/python3.5/site-packages/IPython/lib/pretty.py in _repr_pprint(obj, p, cycle)
692 """A pprint that just redirects to the normal repr function."""
693 # Find newlines and replace them with p.break_()
--> 694 output = repr(obj)
695 for idx,output_line in enumerate(output.splitlines()):
696 if idx:
/Users/tom.augspurger/Envs/py3/lib/python3.5/site-packages/pandas/pandas/core/base.py in __repr__(self)
70 Yields Bytestring in Py2, Unicode String in py3.
71 """
---> 72 return str(self)
73
74
/Users/tom.augspurger/Envs/py3/lib/python3.5/site-packages/pandas/pandas/core/base.py in __str__(self)
49
50 if compat.PY3:
---> 51 return self.__unicode__()
52 return self.__bytes__()
53
/Users/tom.augspurger/Envs/py3/lib/python3.5/site-packages/pandas/pandas/core/categorical.py in __unicode__(self)
1571 result = self._tidy_repr(_maxlen)
1572 elif len(self._codes) > 0:
-> 1573 result = self._get_repr(length=len(self) > _maxlen)
1574 else:
1575 result = ('[], %s' %
/Users/tom.augspurger/Envs/py3/lib/python3.5/site-packages/pandas/pandas/core/categorical.py in _get_repr(self, length, na_rep, footer)
1562 formatter = fmt.CategoricalFormatter(self, length=length,
1563 na_rep=na_rep, footer=footer)
-> 1564 result = formatter.to_string()
1565 return compat.text_type(result)
1566
/Users/tom.augspurger/Envs/py3/lib/python3.5/site-packages/pandas/pandas/formats/format.py in to_string(self)
134 result = [u('[') + result + u(']')]
135 if self.footer:
--> 136 footer = self._get_footer()
137 if footer:
138 result.append(footer)
/Users/tom.augspurger/Envs/py3/lib/python3.5/site-packages/pandas/pandas/formats/format.py in _get_footer(self)
105 footer += "Length: %d" % len(self.categorical)
106
--> 107 level_info = self.categorical._repr_categories_info()
108
109 # Levels are added in a newline
/Users/tom.augspurger/Envs/py3/lib/python3.5/site-packages/pandas/pandas/core/categorical.py in _repr_categories_info(self)
1540 start = True
1541 cur_col_len = len(levheader) # header
-> 1542 sep_len, sep = (3, " < ") if self.ordered else (2, ", ")
1543 linesep = sep.rstrip() + "\n" # remove whitespace
1544 for val in category_strs:
ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()If you look through the traceback, the error happens in the repr, not at construction time.
The regular Categorical constructor does catch this (error message could be improved though).
Expected Output
TypeError("orderedmust be a boolean, got {!r} instead")
output of pd.show_versions()
master