按值转换和格式化 Python 中的字典列表

Question

希望有人能帮我查字典：

    data = [
  {
    "firstname" : "David",
    "lastname"  : "Brown",
    "class"       : [ "economy" ]
  },
  {
    "firstname" : "Alina",
    "lastname"  : "Hoper",
    "class"       : [ "economy", "business" ]
  },
  {
    "firstname" : "Bill",
    "lastname"  : "Flow",
    "class"       : [ "business" ]
  },
  {
    "firstname" : "James",
    "lastname"  : "Frank",
    "class"       : [ "economy" ]
  }
]

作为输出，我需要查看谁购买了经济，谁购买了商业 class：排序 = 按 class 升序，在 class 内按名字升序。所以商业是第一位的，然后是经济。 Alina 在两个 classes 中都排名第一，因为她买了两个 classes。

business: Alina Hoper, Bill Flow, ...
economy: Alina Hoper, David Brown, ...

我尝试编写函数，但现在无法理解从哪里开始排序以及如何通过 class:

转换字典和分组数据

def analyze(customers_data):
    data = ""
    data += "{} {} \n".format(customers_data["firstname"], customers_data["lastname"])
    data += "{} \n".format(customers_data["aff"])
    return data

for d in orders:
    print(analyze(d))

希望有人能帮忙

Answer 1

您应该首先获取 economy/business 客户的列表，然后打印这些列表中的姓名：

data = [
  {
    "firstname" : "David",
    "lastname"  : "Brown",
    "class"       : [ "economy" ]
  },
  {
    "firstname" : "Alina",
    "lastname"  : "Hoper",
    "class"       : [ "economy", "business" ]
  },
  {
    "firstname" : "Bill",
    "lastname"  : "Flow",
    "class"       : [ "business" ]
  },
  {
    "firstname" : "James",
    "lastname"  : "Frank",
    "class"       : [ "economy" ]
  }
]

business_custom = [dic for dic in data if "business" in dic["class"]]
eco_custom = [dic for dic in data if "economy" in dic["class"]]

business_names = ', '.join(sorted([f"{dic['firstname']} {dic['lastname']}" for dic in business_custom]))
economy_names = ', '.join(sorted([f"{dic['firstname']} {dic['lastname']}" for dic in eco_custom]))

print(f"business: {business_names}")
print(f"economy: {economy_names}")

输出：

business : Alina Hoper, Bill Flow
economy : Alina Hoper, David Brown, James Frank

编辑：如果您事先不知道 class 个名称，您可以创建一组 classes：

class_set = set()
for dic in data:
    for c in dic['class']:
        class_set.add(c)

for c in sorted(list(class_set)):
    custom = [dic for dic in data if c in dic["class"]]
    names = ', '.join(sorted([f"{dic['firstname']} {dic['lastname']}" for dic in custom]))
    print(f"{c}: {names}")

按值转换和格式化 Python 中的字典列表

convert and format list of dictionaries in Pyton by values

format

dictionary

function

list

python-3.x

编辑：如果您事先不知道 class 个名称，您可以创建一组 classes：