On Mon, Feb 6, 2012 at 7:46 AM, javier <vengor...@gmail.com> wrote:
> Hi all,
>
> is there a way of saving (a list of) GAP objects so that they can be
> recovered in a different session?
There is a way to save the gap workspace. I think it is
explained in the gap interface module somewhere.
That might help.
>
> This is a minimal example of what we get right now. In my particular
> situation, the group(s) are obtained from the Small Group Library
> (contained in the database-gap optional package) so they cannot be
> easily converted to sage groups:
>
>
> sage: G = gap.SymmetricGroup(4)
> sage: save(G, "Ggap")
> sage: exit
>
> And after opening sage again:
>
> sage: H = load("Ggap")
> sage: H
> ---------------------------------------------------------------------------
> ValueError Traceback (most recent call
> last)
>
> /Users/javier/code/<ipython console> in <module>()
>
> /Applications/sage/local/lib/python2.7/site-packages/IPython/
> Prompts.pyc in __call__(self, arg)
> 550
> 551 # and now call a possibly user-defined print
> mechanism
>
> --> 552 manipulated_val = self.display(arg)
> 553
> 554 # user display hooks can change the variable to be
> stored in
>
>
> /Applications/sage/local/lib/python2.7/site-packages/IPython/
> Prompts.pyc in _display(self, arg)
> 576 return IPython.generics.result_display(arg)
> 577 except TryNext:
> --> 578 return self.shell.hooks.result_display(arg)
> 579
> 580 # Assign the default display method:
>
>
> /Applications/sage/local/lib/python2.7/site-packages/IPython/hooks.pyc
> in __call__(self, *args, **kw)
> 139 #print "prio",prio,"cmd",cmd #dbg
>
> 140 try:
> --> 141 ret = cmd(*args, **kw)
> 142 return ret
> 143 except ipapi.TryNext, exc:
>
> /Applications/sage/local/lib/python2.7/site-packages/sage/misc/
> displayhook.pyc in result_display(ip_self, obj)
> 148 # IPython's default result_display() uses the
> IPython.genutils.Term.cout stream.
>
> 149 # See also local/lib/python2.6/site-packages/IPython/
> hooks.py.
>
> --> 150 print_obj(IPython.genutils.Term.cout, obj)
> 151
> 152 def displayhook(obj):
>
> /Applications/sage/local/lib/python2.7/site-packages/sage/misc/
> displayhook.pyc in print_obj(out_stream, obj)
> 140 if _check_tall_list_and_print(out_stream, obj):
> 141 return
> --> 142 print >>out_stream, `obj`
> 143
> 144 def result_display(ip_self, obj):
>
> /Applications/sage/local/lib/python2.7/site-packages/sage/interfaces/
> gap.pyc in __repr__(self)
> 714 2
> 715 """
> --> 716 s = ExpectElement.__repr__(self)
> 717 if s.find('must have a value') != -1:
> 718 raise RuntimeError, "An error occurred creating an
> object in %s from:\n'%s'\n%s"%(self.parent().name(), self._create, s)
>
> /Applications/sage/local/lib/python2.7/site-packages/sage/interfaces/
> interface.pyc in __repr__(self)
> 869
> 870 def __repr__(self):
> --> 871 self._check_valid()
> 872 try:
> 873 if self._get_using_file:
>
> /Applications/sage/local/lib/python2.7/site-packages/sage/interfaces/
> expect.pyc in _check_valid(self)
> 1157 raise ValueError, "The %s session in which
> this object was defined is no longer running."%P.name()
> 1158 except AttributeError:
> -> 1159 raise ValueError, "The session in which this
> object was defined is no longer running."
> 1160 return P
> 1161
>
> ValueError: The session in which this object was defined is no longer
> running.
>
> --
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