sortJobSize = sorted(jobSize)
a=0
while a<len(length):
     n=0	
     while n < len(length):
          if jobSize[n] == sortJobSize[a]:
               length[a] = length[n]
          n+=1
     a+=1

>>> jobSize = [   5,    8,   3,   4,   1,    9,  7 ]
>>> length   = [ 500, 80, 300, 4, 10, 900, 70]

>>> L = zip(*sorted(zip(tuple(jobSize), tuple(length))))
>>> sortJobSize, length = (list(t) for t in L)
>>> sortJobSize
[1, 3, 4, 5, 7, 8, 9]
>>> length
[10, 300, 4, 500, 70, 80, 900]

def sorting_index(sequence):
    return zip(*sorted((y, x) for (x, y) in enumerate(sequence)))[1]
 
if __name__ == "__main__":
    jobSize = [5, 8, 3, 4, 1, 9, 7]
    length = [ 500, 80, 300, 4, 10, 900, 70]
 
    index = sorting_index(jobSize)
    print("job sizes: {0}".format(jobSize))
    print("lengths: {0}".format(length))
    print("sorted job sizes: {0}".format([jobSize[i] for i in index]))
    print("updated lengths: {0}".format([length[i] for i in index]))
    print("index: {0}".format(index))
 
""" my output --->
job sizes: [5, 8, 3, 4, 1, 9, 7]
lengths: [500, 80, 300, 4, 10, 900, 70]
sorted job sizes: [1, 3, 4, 5, 7, 8, 9]
updated lengths: [10, 300, 4, 500, 70, 80, 900]
index: (4, 2, 3, 0, 6, 1, 5)
"""

def sorting_index(sequence):
    return list(zip(*sorted((y, x) for (x, y) in enumerate(sequence))))[1]