from python_abstractbase import *
from collections import *
# Builtin types can't inherit from pure-python abstract bases
#assert issubclass(Mapii, MutableMapping)
#assert issubclass(Multimapii, MutableMapping)
#assert issubclass(IntSet, MutableSet)
#assert issubclass(IntMultiset, MutableSet)
#assert issubclass(IntVector, MutableSequence)
#assert issubclass(IntList, MutableSequence)