Dear support team,
a basic question whose answer i was neither able to find in the Sage
Programming Guide nor in http://modular.math.washington.edu/sage/doc/html/tut/:
Suppose i have an extension class Foo and an instance X of Foo. What
methods must Foo provide in order to make things work like the
following?
save(X,'bla')
Y=load('bla')
The class Foo has a method "save" and a method "load", and the
following works:
X.save('bla')
Y=Foo('') # initializes Y as instance of Foo
Y.load('bla')
But apparently for supporting the simpler syntax "save(X,'bla')
load('bla')" this is not enough.
Also I found some rumor in the doc strings about a method "dumps", and
that the result of "dumps" can be used by "loads" in order to produce
an object. But apparently "loads" is not the same as "eval": If i have
a string s that makes "eval(s)" to return a copy of X, "loads(s)"
fails.
So what is Foo.dumps supposed to do?
I'm sure that there is some written documentation on how to do those
things. Simply i couldn't find them.
Cheers
Simon
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