def reorder( x, indexList=[], indexDict={} ):
    """
    Reorder a list based upon a list of positional indices and/or a dictionary of fromIndex:toIndex.

        >>> l = ['zero', 'one', 'two', 'three', 'four', 'five', 'six']
        >>> reorder( l, [1, 4] ) # based on positional indices: 0-->1, 1-->4
        ['one', 'four', 'zero', 'two', 'three', 'five', 'six']
        >>> reorder( l, [1, None, 4] ) # None can be used as a place-holder
        ['one', 'zero', 'four', 'two', 'three', 'five', 'six']
        >>> reorder( l, [1, 4], {5:6} )  # remapping via dictionary: move the value at index 5 to index 6
        ['one', 'four', 'zero', 'two', 'three', 'six', 'five']
    """

    x = list(x)
    num = len(x)
    popCount = 0
    indexValDict = {}

    for i, index in enumerate(indexList):
        if index is not None:
            val = x.pop( index-popCount )
            assert index == indexDict, indexDict
            indexValDict[i] = val
            popCount += 1
    for k, v in indexDict.items():
        indexValDict[v] = x.pop(k-popCount)
        popCount += 1

    newlist = []
    for i in range(num):
        try:
            val = indexValDict[i]
        except KeyError:
            val = x.pop(0)
        newlist.append( val )
    return newlist
dataset/ETHPy150Open CountZer0/PipelineConstructionSet/python/maya/site-packages/pymel-1.0.3/pymel/util/arguments.py/reorder/operator `not in` -> `==`