Rearranging list based on order of another list

问题

I am sure this question has possibly been asked before but I can't seem to find the correct answer. If I have two lists

_list1 = ["keyName", "test1", "test2"]
_list2 = ["keyName", "test2", "test1"]

I am trying to use _list1 to rearrange elements in _list2 so that they match the order exactly. What's the cleanest way to do that? Desired output:

_list1 = ["keyName", "test1", "test2"]
_list2 = ["keyName", "test1", "test2"]

I am sorry if this is duplicate but so far I am only able to find answers for list of numbers and using zipped sorted() method.

What if the _list2 is a list of lists?

_list2 = [["test1", "test2", "keyName"], ["test2", "test1", "keyName"]]

Desired Output:

_list2 = [["keyName", "test1", "test2"], ["keyName", "test1", "test2"]]

One more what if: What if I wanted to sort any other list of objects using _list1 as a key

_list2 = [[object1, object2, object3], [object1, object2, object3]]

where:

object1.Name = "keyName"
object3.Name = "test1"
object2.Name = "test2"

so effectively I would expect output of:

_list2 = [[object1, object3, objec1], [object1, object3, objec1]]

Is that possible?

回答1:

In [84]: _list1 = ["keyName", "test1", "test2"]

In [85]: d = {k:v for v,k in enumerate(_list1)}

In [86]: _list2 = ["keyName", "test2", "test1"]

In [87]: _list2.sort(key=d.get)

In [88]: _list2
Out[88]: ['keyName', 'test1', 'test2']

回答2:

try to use key with sorted:

sorted(_list2,key=_list1.index)

for nested list you can use list comphresnion:

[sorted(x,key=_lis1.index) for x in _list2]

来源：https://stackoverflow.com/questions/27725703/rearranging-list-based-on-order-of-another-list