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" <nthi...@users.sf.net>
http://Nicolas.Thiery.name/
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