I would like to run the doctests in my file, "sandpile.sage", but get
the following error message:
++++++++++++++++++++++++++++++++++===
xyzzy> sage -t sandpile.sage
sage -t "sandpile.sage"
/usr/local/sage-devel/local/bin/sage-preparse: File file_name is
missing
Traceback (most recent call last):
File "./sandpile.py", line 18, in <module>
from sandpile import *
File "/home/davidp/math/sandpile/sage/sage-sandpile1.4/sandpile.py",
line 167, in <module>
class Sandpile(DiGraph):
NameError: name 'DiGraph' is not defined
[1.6 s]
exit code: 1024
----------------------------------------------------------------------
The following tests failed:
sage -t "sandpile.sage"
Total time for all tests: 1.6 seconds
++++++++++++++++++++++++++++++++++++++++++++++++++++++
I tried adding
from sage.graphs.graph import DiGraph
to the file but got the same error message.
Any suggestions?
Thanks,
Dave
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