[python] 字典dict 和串列list 的幾種排序方法

9月 25, 2019

分享幾種python字典dict和串列list的排序方法。

字典(dict)排序

demo_dict = {
    "key5": "value5",
    "key3": "value3",
    "key1": "value1",
    "key2": "value2",
    "key4": "value4",
}

sort_list = [(k, demo_dict[k]) for k in sorted(demo_dict.keys())]
reverse_sort_list = [(k, demo_dict[k]) for k in sorted(demo_dict.keys(), reverse=True)]

串列(list)排序

(1)串列list中是值value

demo_list = [
    "vlaue5",
    "vlaue3",
    "vlaue1",
    "vlaue2",
    "vlaue4"
]

sort_list = sorted(demo_list)
reverse_sort_list = sorted(demo_list, reverse=True)

(2)串列list中是字典dict

demo_list = [
    {"key": "key5", "value": "value5"},
    {"key": "key3", "value": "value3"},
    {"key": "key1", "value": "value1"},
    {"key": "key2", "value": "value2"},
    {"key": "key4", "value": "value4"}
]

sort_list = sorted(demo_list, key=lambda k: k["key"])
reverse_sort_list = sorted(demo_list, key=lambda k: k["key"], reverse=True)

(3)串列list中是串列list

demo_list = [
    ["key5", "vlaue5"],
    ["key3", "vlaue3"],
    ["key1", "vlaue1"],
    ["key2", "vlaue2"],
    ["key4", "vlaue4"]
]

sort_list = sorted(demo_list, key=lambda k: k[0])
reverse_sort_list = sorted(demo_list, key=lambda k: k["key"], reverse=True)

Tags python