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def mxrange(start,end=0,step=1): (start,end) = start>end and (end,start) or (start,end) while start < end: yield start start+=step print [i for i in xrange(5)],[i for i in mxrange(5)] print [i for i in xrange(1,5)],[i for i in mxrange(1,5)] print [i for i in xrange(4,5,2)],[i for i in mxrange(4,5,2)] ''' [0, 1, 2, 3, 4] [0, 1, 2, 3, 4] [1, 2, 3, 4] [1, 2, 3, 4] [4] [4] '''