Functions not found when calling KaHIP from python

[mtraube]

Hello there,

I have trouble understanding how to call different methods of kahip in python. When running

import kahip
#build adjacency array representation of the graph
xadj           = [0,2,5,7,9,12]
adjncy         = [1,4,0,2,4,1,3,2,4,0,1,3]
vwgt           = [1,1,1,1,1]
adjcwgt        = [1,1,1,1,1,1,1,1,1,1,1,1]
supress_output = 0
imbalance      = 0.03
nblocks        = 2
seed           = 0

# set mode
#const int FAST           = 0;
#const int ECO            = 1;
#const int STRONG         = 2;
#const int FASTSOCIAL     = 3;
#const int ECOSOCIAL      = 4;
#const int STRONGSOCIAL   = 5;
mode = 2

edgecut, blocks = kahip.node_separator(vwgt, xadj, adjcwgt,
                              adjncy,  nblocks, imbalance,
                              supress_output, seed, mode)

print(edgecut)
print(blocks)`

I get the error

AttributeError: module 'kahip' has no attribute 'node_separator

How do I call functions other than kaffpa through the python interface?

Best,
Matthias

[schulzchristian]

Hi, I am on vacation till the end of the month. Will look at it after that. Best Christian

…

On Fri, 15 Sep 2023, 16:47 mtraube, ***@***.***> wrote: Hello there, I have trouble understanding how to call different methods of kahip in python. When running ` import kahip #build adjacency array representation of the graph xadj = [0,2,5,7,9,12] adjncy = [1,4,0,2,4,1,3,2,4,0,1,3] vwgt = [1,1,1,1,1] adjcwgt = [1,1,1,1,1,1,1,1,1,1,1,1] supress_output = 0 imbalance = 0.03 nblocks = 2 seed = 0 # set mode #const int FAST = 0; #const int ECO = 1; #const int STRONG = 2; #const int FASTSOCIAL = 3; #const int ECOSOCIAL = 4; #const int STRONGSOCIAL = 5; mode = 2 edgecut, blocks = kahip.node_separator(vwgt, xadj, adjcwgt, adjncy, nblocks, imbalance, supress_output, seed, mode) print(edgecut) print(blocks)` I get the error `AttributeError: module 'kahip' has no attribute 'node_separator' How do I call functions other than kaffpa through the python interface? Best, Matthias — Reply to this email directly, view it on GitHub <#136>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABLP7SXE55T5YYINID23U3DX2RS6JANCNFSM6AAAAAA4Z5UIWI> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[schulzchristian]

The problem is that the function is currently not implemented in the python wrapper (here is a link to the wrapper https://github.com/KaHIP/KaHIP/blob/fd4273cf132b1512d1242085f603e6b3952bf372/misc/pymodule/kahip.cpp). Adding this for the node separator function is not hard (almost the same as for the kaffpa function). If you need this urgently this should manageable, and I am happy to take a pull request. Otherwise, I can do it in October.

Please let me know.

Thanks
Christian