"Inappropriate ioctl for device" when displaying number in Jupyter notebook

[Richard Stanton]

I've just installed Sagemath 9.6 (Release Date: 2022-05-15) on my Mac running macOS 12.4. If I create a new Sagemath Jupyter notebook starting from Sagemath, everything seems to work fine. However, I'd like to start by just running "jupyter notebook" at the command line.  When I do this and create a new notebook, selecting Sagemath 9.6 as the kernel, the kernel starts up fine and I can run code. However, while `print(2)` correctly displays the number 2, just typing `2` results in the error message shown in the title. Any suggestions? Thanks!

Here's the full error dump:

{{{

--------------------------------------------------------------------------
OSError                                   Traceback (most recent call last)
/var/folders/z_/x5g7y7vd6wqd2kzfnmfdqjjh0000gn/T/ipykernel_14807/1798176506.py in <module>
----> 1 Integer(2)

/private/var/tmp/sage-9.6-current/local/var/lib/sage/venv-python3.10.3/lib/python3.10/site-packages/IPython/core/displayhook.py in __call__(self, result)
    260             self.start_displayhook()
    261             self.write_output_prompt()
--> 262             format_dict, md_dict = self.compute_format_data(result)
    263             self.update_user_ns(result)
    264             self.fill_exec_result(result)

/private/var/tmp/sage-9.6-current/local/var/lib/sage/venv-python3.10.3/lib/python3.10/site-packages/IPython/core/displayhook.py in compute_format_data(self, result)
    149
    150         """
--> 151         return self.shell.display_formatter.format(result)
    152
    153     # This can be set to True by the write_output_prompt method in a subclass

/private/var/tmp/sage-9.6-current/local/var/lib/sage/venv-python3.10.3/lib/python3.10/site-packages/sage/repl/display/formatter.py in format(self, obj, include, exclude)
    186             I am repper
    187         """
--> 188         sage_format, sage_metadata = self.dm.displayhook(obj)
    189         assert PLAIN_TEXT in sage_format, 'plain text is always present'
    190

/private/var/tmp/sage-9.6-current/local/var/lib/sage/venv-python3.10.3/lib/python3.10/site-packages/sage/repl/rich_output/display_manager.py in displayhook(self, obj)
    825             return
    826         self._backend.set_underscore_variable(obj)
--> 827         plain_text, rich_output = self._rich_output_formatter(obj, dict())
    828         return self._backend.displayhook(plain_text, rich_output)
    829

/private/var/tmp/sage-9.6-current/local/var/lib/sage/venv-python3.10.3/lib/python3.10/site-packages/sage/repl/rich_output/display_manager.py in _rich_output_formatter(self, obj, rich_repr_kwds)
    652             plain_text = self._backend.plain_text_formatter(obj, **rich_repr_kwds)
    653         if rich_output is None:
--> 654             rich_output = self._preferred_text_formatter(
    655                 obj, plain_text=plain_text, **rich_repr_kwds)
    656         # promote output container types to backend-specific containers

/private/var/tmp/sage-9.6-current/local/var/lib/sage/venv-python3.10.3/lib/python3.10/site-packages/sage/repl/rich_output/display_manager.py in _preferred_text_formatter(self, obj, plain_text, **kwds)
    550             return out
    551         if want == 'unicode_art' and OutputUnicodeArt in supported:
--> 552             out = self._backend.unicode_art_formatter(obj, **kwds)
    553             if type(out) is not OutputUnicodeArt:
    554                 raise OutputTypeException('backend returned wrong output type, require UnicodeArt')

/private/var/tmp/sage-9.6-current/local/var/lib/sage/venv-python3.10.3/lib/python3.10/site-packages/sage/repl/rich_output/backend_base.py in unicode_art_formatter(self, obj, **kwds)
    425             result = unicode_art(obj)
    426         from sage.repl.rich_output.output_basic import OutputUnicodeArt
--> 427         return OutputUnicodeArt(str(result))
    428
    429     def latex_formatter(self, obj, **kwds):

/private/var/tmp/sage-9.6-current/local/var/lib/sage/venv-python3.10.3/lib/python3.10/site-packages/sage/structure/sage_object.pyx in sage.structure.sage_object.SageObject.__repr__ (build/cythonized/sage/structure/sage_object.c:2558)()
    192         except AttributeError:
    193             return super().__repr__()
--> 194         result = reprfunc()
    195         if isinstance(result, str):
    196             return result

/private/var/tmp/sage-9.6-current/local/var/lib/sage/venv-python3.10.3/lib/python3.10/site-packages/sage/typeset/character_art.py in _repr_(self)
    153             hsize = MAX_WIDTH
    154         else:
--> 155             hsize = self._terminal_width()
    156         # if the draw is larger than the max length, try to split it
    157         if hsize <= self._l and self._breakpoints:

/private/var/tmp/sage-9.6-current/local/var/lib/sage/venv-python3.10.3/lib/python3.10/site-packages/sage/typeset/character_art.py in _terminal_width(self)
    281         import termios
    282         import struct
--> 283         rc = fcntl.ioctl(int(0), termios.TIOCGWINSZ,
    284                          struct.pack('HHHH', sys.stdout.fileno(), 0, 0, 0))
    285         h, w, hp, wp = struct.unpack('HHHH', rc)

OSError: [Errno 25] Inappropriate ioctl for device

}}}

[John H Palmieri]

This might be fixed by the change at https://trac.sagemath.org/ticket/33996. That will presumably be merged in the next beta release, since the ticket was just closed two days ago.

[Alex J Best]

Indeed that should fix it, in the meantime you can run something like

sage: from sage.typeset.ascii_art import AsciiArt

sage: AsciiArt._terminal_width = lambda x: 80

Before running other commands to fix the problem in a given notebook