本文实例讲述了Python常见排序操作。分享给大家供大家参考，具体如下：
字典排序
- 按value排序
|
1
2
3
|
d1 = {"name":"python","bank":"icbc","country":china}
# reverse是否倒序,x[1]代表value,x[0]为key
d1 = sorted(d1.items(),lambda x: x[1],reverse=True)
|
- 按key排序
|
1
2
|
d1 = {"name":"python","bank":"icbc","country":china}
d1 = sorted(d1.items())
|
列表排序
- 不去重排序
|
1
2
3
|
l = [3,2,4,5]
l = sorted(l) # 升序
# l = sorted(l,reverse=True) # 降序
|
- 去重排序
|
1
2
3
4
|
l = [3,2,3,5,1]
l = set(l) # 使用set集合去重
l = list(l) #
l = sorted(l) # 排序
|
字典列表排序
|
1
2
3
4
5
6
7
|
# 以age升序排序
L = [
{"name":"python","age":12},
{"name":"ghj","age":10},
{"name":"java","age":17}
]
L = sorted(L,key=lambda x: x["age"])
|
根据指定列表的元素顺序进行排序
用途：对于取出MySQL与MongoDB的数据时，我们常常需要对数据进行位置更换顺序，此时此种排序就能很好的解决我们的问题，对于下面列子中的sortList的数据我们可以使用Redis进行存储
|
1
2
3
4
5
6
7
8
|
# 指定列表，假设存储的是curList中的ID列表
sortList = ["4","3","5","2","1"]
# 当前列表
curList = [{"id":"1","province":"河南"},{"id":"2","province":"河北"},{"id":"3","湖南"},{"id":"4","province":"湖北"},{"id":"5","province":"江西"}]
# 根据指定列表中的ID顺序，对当前列表进行排序
curList = sorted(curList,key = lambda item:sortList.index(item["id"]))
print(curList)
# [{"id":"4","province":"湖北"},{"id":"3","province":"湖南"},{"id":"5","province":"江西"},{"id":"2","province":"河北"},{"id":"1","province":"河南"}]
|
希望本文所述对大家Python程序设计有所帮助。
原文链接：https://blog.csdn.net/y472360651/article/details/78132213