On Sat, Oct 3, 2009 at 3:10 PM, Ethan Van Andel <evlu...@gmail.com> wrote:
>
>
>
> On Oct 3, 3:01 pm, Robert Bradshaw <rober...@math.washington.edu>
> wrote:
>> On Oct 3, 2009, at 11:36 AM, Ethan Van Andel wrote:
>>
>>
>>
>>
>>
>> > I have a class Riemann Map, coded in cython and added to the sage
>> > library.
>>
>> > I have this problem: Note that m is an instance of Riemann_Map and
>> > get_szego returns an array contained in m.
>>
>> > sage: dumps(m)
>> > 'x\x9ck`J.NLO\xd5KN\xccI.\xcd)-\xd6+\xcaL\xcdM\xcc\xcb\xe3\n
>> > \x82\xd0\xf1\
>> > \xbe\x89\x05\\\x85\x8c\x9a\x8d\x85Lz\x00i\xbe\x0f@'
>>
>> > sage: m == loads(dumps(m))
>> > False
>>
>> > sage: len(dumps(m.get_szego()))
>> > 63410
>>
>> > Do I need to define dumps for my classes? If so, how?
>>
>> You need to define a __reduce__ method. You also need to make sure
>> you have a __cmp__ method.
>>
>> - Robert
>
>
> Sorry, but where can I find info on what those are?
>
> I checked the documentation but couldn't find anything helpful.
>
They are Python language features. So if you type
python __reduce__
into Google, the first his it is:
http://docs.python.org/library/pickle.html
William
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