[Numpy-discussion] sets in python and/or numpy

I find myself needing the set operations provided by python 2.4 such as intersection, difference, or even just the advantages of the data strucure itself, like that fact that I can try adding something to it and if it's already there, it won't get added again. Will my decision to use of the python 'set' datastructure come back to haunt me later by being too slow? Is there anything equivalent in scipy or numpy that I can use? I find myself going between numpy arrays and sets a lot because I sometimes need to treat it like an array to use some of the array functions. Sorry for cross-posting to scipy and numpy... is that a bad idea? -- David Grant http://www.davidgrant.ca