【Python】二维数组降序排序例子

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如下的例子中，将二维数组按照第二维的降序进行排序

### Prepare the list
complist = []

tmpFactor= []
tmpFactor.append("[Action-1]")
tmpFactor.append(3)
complist.append(tmpFactor)

tmpFactor= []
tmpFactor.append("[Action-2]")
tmpFactor.append(5)
complist.append(tmpFactor)

tmpFactor= []
tmpFactor.append("[Action-3]")
tmpFactor.append(2)
complist.append(tmpFactor)

tmpFactor= []
tmpFactor.append("[Action-4]")
tmpFactor.append(1)
complist.append(tmpFactor)

tmpFactor= []
tmpFactor.append("[Action-5]")
tmpFactor.append(8)
complist.append(tmpFactor)

tmpFactor= []
tmpFactor.append("[Action-6]")
tmpFactor.append(4)
complist.append(tmpFactor)

tester=0
lcount = len(complist)

### Sort desc
for x in range(lcount-1):
  for y in range(x+1,lcount):
    print("")
    if complist[x][1] < complist[y][1]:
      complist[x],complist[y]=complist[y],complist[x]
      print("exchanged")
    else:
      tester=1  ## Just to make if-else to end easily
    print(complist)

tester=0 ## Just to make the outer for cycle to end easily
print (complist)

运行结果如下：

exchanged
[['[Action-2]', 5], ['[Action-1]', 3], ['[Action-3]', 2], ['[Action-4]', 1], ['[Action-5]', 8], ['[Action-6]', 4]]

[['[Action-2]', 5], ['[Action-1]', 3], ['[Action-3]', 2], ['[Action-4]', 1], ['[Action-5]', 8], ['[Action-6]', 4]]

[['[Action-2]', 5], ['[Action-1]', 3], ['[Action-3]', 2], ['[Action-4]', 1], ['[Action-5]', 8], ['[Action-6]', 4]]

exchanged
[['[Action-5]', 8], ['[Action-1]', 3], ['[Action-3]', 2], ['[Action-4]', 1], ['[Action-2]', 5], ['[Action-6]', 4]]

[['[Action-5]', 8], ['[Action-1]', 3], ['[Action-3]', 2], ['[Action-4]', 1], ['[Action-2]', 5], ['[Action-6]', 4]]

[['[Action-5]', 8], ['[Action-1]', 3], ['[Action-3]', 2], ['[Action-4]', 1], ['[Action-2]', 5], ['[Action-6]', 4]]

[['[Action-5]', 8], ['[Action-1]', 3], ['[Action-3]', 2], ['[Action-4]', 1], ['[Action-2]', 5], ['[Action-6]', 4]]

exchanged
[['[Action-5]', 8], ['[Action-2]', 5], ['[Action-3]', 2], ['[Action-4]', 1], ['[Action-1]', 3], ['[Action-6]', 4]]

[['[Action-5]', 8], ['[Action-2]', 5], ['[Action-3]', 2], ['[Action-4]', 1], ['[Action-1]', 3], ['[Action-6]', 4]]

[['[Action-5]', 8], ['[Action-2]', 5], ['[Action-3]', 2], ['[Action-4]', 1], ['[Action-1]', 3], ['[Action-6]', 4]]

exchanged
[['[Action-5]', 8], ['[Action-2]', 5], ['[Action-1]', 3], ['[Action-4]', 1], ['[Action-3]', 2], ['[Action-6]', 4]]

exchanged
[['[Action-5]', 8], ['[Action-2]', 5], ['[Action-6]', 4], ['[Action-4]', 1], ['[Action-3]', 2], ['[Action-1]', 3]]

exchanged
[['[Action-5]', 8], ['[Action-2]', 5], ['[Action-6]', 4], ['[Action-3]', 2], ['[Action-4]', 1], ['[Action-1]', 3]]

exchanged
[['[Action-5]', 8], ['[Action-2]', 5], ['[Action-6]', 4], ['[Action-1]', 3], ['[Action-4]', 1], ['[Action-3]', 2]]

exchanged
[['[Action-5]', 8], ['[Action-2]', 5], ['[Action-6]', 4], ['[Action-1]', 3], ['[Action-3]', 2], ['[Action-4]', 1]]
>>> tester=0 ## Just to make the outer for cycle to end easily
>>> print (complist)
[['[Action-5]', 8], ['[Action-2]', 5], ['[Action-6]', 4], ['[Action-1]', 3], ['[Action-3]', 2], ['[Action-4]', 1]]
>>>