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# Revision history [back]

Hi Fedelbc, thanks for reminding me update my question! :)

Here is the error I got:

sage: def my_digraph(filename):
f = open(filename, 'r')
D=DiGraph(loops=True,multiedges=True)
for c in f:
c = c[1:-2]
s1, g, s2 = c.split(', ')
D.add_edge([ s1, s2, g ])
f.close()
return D
....:
sage: graph = my_digraph("result")
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)

/mount/autofs/home_stude/tsang/<ipython console> in <module>()

/mount/autofs/home_stude/tsang/<ipython console> in my_digraph(filename)

ValueError: need more than 1 value to unpack


Do you have any suggestions please? Thanks again for your kind help. :)