BUG: iloc on DataFrame[ea]

[jbrockmendel]

from pandas.tests.extension.decimal.test_decimal import *
arr = data.__wrapped__()
ser = pd.Series(arr)
df = pd.DataFrame({"a": ser})

>>> df.iloc[:, :1]
                                                   a
0  Decimal: 0.32737812402736643502265678762341849...
1                                                   
2                                                   
3                                                   

>>> df.iloc[:, :1].values
array([[Decimal('0.32737812402736643502265678762341849505901336669921875')]],
      dtype=object)

Maybe slicing on the wrong axis?

[jorisvandenbossche]

I actually get an error:

In [2]: df.iloc[:, :1]                                                                                                                                                                                             
Out[2]: ---------------------------------------------------------------------------
IndexError                                Traceback (most recent call last)
~/miniconda3/envs/dev/lib/python3.7/site-packages/IPython/core/formatters.py in __call__(self, obj)
    700                 type_pprinters=self.type_printers,
    701                 deferred_pprinters=self.deferred_printers)
--> 702             printer.pretty(obj)
    703             printer.flush()
    704             return stream.getvalue()

~/miniconda3/envs/dev/lib/python3.7/site-packages/IPython/lib/pretty.py in pretty(self, obj)
    400                         if cls is not object \
    401                                 and callable(cls.__dict__.get('__repr__')):
--> 402                             return _repr_pprint(obj, self, cycle)
    403 
    404             return _default_pprint(obj, self, cycle)

~/miniconda3/envs/dev/lib/python3.7/site-packages/IPython/lib/pretty.py in _repr_pprint(obj, p, cycle)
    695     """A pprint that just redirects to the normal repr function."""
    696     # Find newlines and replace them with p.break_()
--> 697     output = repr(obj)
    698     for idx,output_line in enumerate(output.splitlines()):
    699         if idx:

~/scipy/pandas/pandas/core/frame.py in __repr__(self)
    695             line_width=width,
    696             max_colwidth=max_colwidth,
--> 697             show_dimensions=show_dimensions,
    698         )
    699 

~/scipy/pandas/pandas/core/frame.py in to_string(self, buf, columns, col_space, header, index, na_rep, formatters, float_format, sparsify, index_names, justify, max_rows, min_rows, max_cols, show_dimensions, decimal, line_width, max_colwidth, encoding)
    827                 line_width=line_width,
    828             )
--> 829             return formatter.to_string(buf=buf, encoding=encoding)
    830 
    831     # ----------------------------------------------------------------------

~/scipy/pandas/pandas/io/formats/format.py in to_string(self, buf, encoding)
    901         encoding: Optional[str] = None,
    902     ) -> Optional[str]:
--> 903         return self.get_result(buf=buf, encoding=encoding)
    904 
    905     def to_latex(

~/scipy/pandas/pandas/io/formats/format.py in get_result(self, buf, encoding)
    518         """
    519         with self.get_buffer(buf, encoding=encoding) as f:
--> 520             self.write_result(buf=f)
    521             if buf is None:
    522                 return f.getvalue()

~/scipy/pandas/pandas/io/formats/format.py in write_result(self, buf)
    814         else:
    815 
--> 816             strcols = self._to_str_columns()
    817             if self.line_width is None:  # no need to wrap around just print
    818                 # the whole frame

~/scipy/pandas/pandas/io/formats/format.py in _to_str_columns(self)
    777             for ix, col in enumerate(strcols):
    778                 # infer from above row
--> 779                 cwidth = self.adj.len(strcols[ix][row_num])
    780                 is_dot_col = False
    781                 if truncate_h:

IndexError: list index out of range

[jorisvandenbossche]

Ah, that's in the repr. Stil strange that you don't get an error in the repr

[jbrockmendel]

Stil strange that you don't get an error in the repr

Yah, I actually get the same behavior you're getting now, but didnt 18 hours ago. No idea what changed