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About sage.plot.plot.EMBEDDED_MODE

asked 2018-06-28 14:26:31 -0600

mmmm1998 gravatar image

Cantor program used sage-cli, and in this program there is need to disable external viewers. I found sage variable, which, I hope, will do it: sage.plot.plot.EMBEDDED_MODE.

But after setting sage.plot.plot.EMBEDDED_MODE to True I haven't any changes: external viewer starts, for example, for plots.

But in src/sage/structure/graphics_file.py on line 161 we have launch_viewer function, which, I think, start external viewer and where there is this condition:


from sage.plot.plot import EMBEDDED_MODE
if EMBEDDED_MODE:
    raise RuntimeError('should never launch viewer in embedded mode')

So, as I see, if sage.plot.plot.EMBEDDED_MODE is True, we don't start external viewer, because we exit from function launc_viewer with RuntimeError. But sage works fine with EMBEDDED_MODE = True. Could anyone explain this behavior, is it a bug with sage.plot.plot.EMBEDDED_MODE or I am wrong?

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answered 2018-07-06 07:02:44 -0600

vdelecroix gravatar image

updated 2018-07-06 07:06:23 -0600

You should be using

sage: from sage.repl.rich_output import get_display_manager
sage: dm = get_display_manager()
sage: dm.preferences.graphics='disable'

The other possibilities for graphics are 'raster' (for png) and 'vector' (for pdf).

The EMBEDDED_MODE is probably a left over of older Sage versions.

EDIT: you probably want to create a backend_cantor.py modeled on the various backend_XXX.py in $SAGE_ROOT/src/sage/repl/rich_output/ (see e.g. on github).

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Asked: 2018-06-28 14:26:31 -0600

Seen: 36 times

Last updated: Jul 06