python set difference
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Published on 2012-04-04T05:25:20Z
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2012/04/04
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I'm doing a set difference operation in Python:
from sets import Set
from mongokit import ObjectId
x = [ObjectId("4f7aba8a43f1e51544000006"), ObjectId("4f7abaa043f1e51544000007"), ObjectId("4f7ac02543f1e51a44000001")]
y = [ObjectId("4f7acde943f1e51fb6000003")]
print list(Set(x).difference(Set(y)))
I'm getting:
[ObjectId('4f7abaa043f1e51544000007'), ObjectId('4f7ac02543f1e51a44000001'), ObjectId('4f7aba8a43f1e51544000006')]
I need to get the first element for next operation which is important. How can I retain the list x in original format?
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