将带有浮点数和整数的字典列表排序为特定顺序

Question

我有一个字典的列表，例如

list = [{'route number': '996', 'happy customers': '0'}, {'route number': '123', 'happy customers': '4'}, {'route number': '321', 'happy customers': '0.00'}, {'route number': '456', 'happy customers': '5'}, {'route number': '856', 'happy customers': '8.760'}, {'route number': '555', 'happy customers': '1.1'}, {'route number': '565', 'happy customers': '0'}, {'route number': '784', 'happy customers': '3.010'}]

我正在尝试按满意的客户对它们进行排序，如果满意的客户 == 0，则按路线编号排序我试过这个：

sorted_list = sorted(list, key = operator.itemgetter ("happy customers", "route number"), reverse = True)

输出是

[{'route number': '856', 'happy customers': '8.760'}, {'route number': '456', 'happy customers': '5'}, {'route number': '123', 'happy customers': '4'}, {'route number': '784', 'happy customers': '3.010'}, {'route number': '555', 'happy customers': '1.1'}, {'route number': '321', 'happy customers': '0.00'}, {'route number': '996', 'happy customers': '0'}, {'route number': '565', 'happy customers': '0'}]

预期输出：

[{'route number': '856', 'happy customers': '8.760'}, {'route number': '456', 'happy customers': '5'}, {'route number': '123', 'happy customers': '4'}, {'route number': '784', 'happy customers': '3.010'}, {'route number': '555', 'happy customers': '1.1'}, {'route number': '321', 'happy customers': '0.00'}, {'route number': '565', 'happy customers': '0'}, {'route number': '996', 'happy customers': '0'}]

我觉得跟

有关系

route number': '321', 'happy customers': '0.00'}

最后的数字是一个浮点数 0.00 而不仅仅是一个 int 0 但我不知道如何更改它以使其工作任何帮助将不胜感激 FYI 从 routes.txt 文件导入的字典列表因此一些数字浮动，一些 int 对如何使这项工作有任何想法？或者我对代码做错了什么

Answer 1

您可以使用自定义 key= 函数，将字符串转换为 float 和 int:

lst = [
    {"route number": "996", "happy customers": "0"},
    {"route number": "123", "happy customers": "4"},
    {"route number": "321", "happy customers": "0.00"},
    {"route number": "456", "happy customers": "5"},
    {"route number": "856", "happy customers": "8.760"},
    {"route number": "555", "happy customers": "1.1"},
    {"route number": "565", "happy customers": "0"},
    {"route number": "784", "happy customers": "3.010"},
]

out = sorted(
    lst, key=lambda k: (-float(k["happy customers"]), int(k["route number"]))
)
print(out)

打印：

[
    {"route number": "856", "happy customers": "8.760"},
    {"route number": "456", "happy customers": "5"},
    {"route number": "123", "happy customers": "4"},
    {"route number": "784", "happy customers": "3.010"},
    {"route number": "555", "happy customers": "1.1"},
    {"route number": "321", "happy customers": "0.00"},
    {"route number": "565", "happy customers": "0"},
    {"route number": "996", "happy customers": "0"},
]

编辑：将字符串转换为数字：

lst = [
    {
        "route number": int(d["route number"]),
        "happy customers": float(d["happy customers"]),
    }
    for d in lst
]

out = sorted(lst, key=lambda k: (-k["happy customers"], k["route number"]))

print(out)

打印：

[
    {"route number": 856, "happy customers": 8.76},
    {"route number": 456, "happy customers": 5.0},
    {"route number": 123, "happy customers": 4.0},
    {"route number": 784, "happy customers": 3.01},
    {"route number": 555, "happy customers": 1.1},
    {"route number": 321, "happy customers": 0.0},
    {"route number": 565, "happy customers": 0.0},
    {"route number": 996, "happy customers": 0.0},
]

将带有浮点数和整数的字典列表排序为特定顺序

sort a list of dict's with floats and int's into specific order

python

sorting

dictionary

list