You can manually pass in the `self` parameter to unbound methods if you like. import itertools class Test(): def __init__( self, number ):

You can manually pass in the `self` parameter to unbound methods if you like. import itertools class Test(): def __init__( self, number ): self._number = number return def aaa( self ): print 'AAA<%s>' % str( self._number ) return def bbb( self ): print 'BBB<%s>' % str( self._number ) def main(): instances = [ Test( n ) for n in range( 100 ) ] functions = [ Test.aaa, Test.bbb ] for instance, function in zip( instances, itertools.cycle( functions ) ): function( instance ) if __name__ == '__main__': main()