Dear Nicolas ,
Thank you
I shall be careful in writing in future.
Sincerely
Biswajit
On Wednesday, 1 February 2017 19:54:11 UTC+5:30, Nicolas M. Thiery wrote:
>
> Dear Biswajit,
>
> On Wed, Feb 01, 2017 at 06:04:40AM -0800, Biswajit Ransingh wrote:
> > dia = DiGraph({'x0':{'x1':(1, -1),'y1':(1, -1),'x2':(1,
> > -1)},'y2':{'x0':(1, -1),'x1':(1, -1)}})
> > diaout = dia.neighbors_out('x0');diaout
> > prod(p for p in diaout)
> > ︡18c0ec18-9974-4cda-b0ba-0ff01686a9fa︡{"stderr":"Error in lines
> > 1-1\nTraceback (most recent call last):\n File
> >
> \"/projects/sage/sage-7.5/local/lib/python2.7/site-packages/smc_sagews/
> > sage_server.py\", line 976, in execute\n exec compile(block+'\\n',
> > '', 'single') in namespace, locals\n File \"\", line 1, in
> <module>\n
> > File \"sage/misc/misc_c.pyx\", line 126, in sage.misc.misc_c.prod
> >
> (/projects/sage/sage-7.5/src/build/cythonized/sage/misc/misc_c.c:2021)\
> > n return iterator_prod(x, z)\n File \"sage/misc/misc_c.pyx\",
> line
> > 229, in sage.misc.misc_c.iterator_prod
> >
> (/projects/sage/sage-7.5/src/build/cythonized/sage/misc/misc_c.c:2719)\
> > n x = sub_prods[tip] * x\nTypeError: can't multiply sequence by
> > non-int of type 'str'\n"}︡{"done":true}︡
>
> This is rather cryptic, and it is rather inconvenient to have half of
> the question in the subject line and half in the text. Please prepare
> an easier to read message next time.
>
> Alternatively, you may want to use ask.sagemath.org.
>
> diaout is a list of strings:
>
> sage: diaout = dia.neighbors_out('x0');diaout
> ['x2', 'y1', 'x1']
>
> If you want to see them as variables, you have to convert them
> explicitly:
>
> sage: prod(SR(v) for v in diaout)
> x1*x2*y1
>
> Best regards,
> Nicolas
> --
> Nicolas M. Thiéry "Isil" <nth...@users.sf.net <javascript:>>
> http://Nicolas.Thiery.name/
>
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