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python - 从嵌套字典中删除键（Python 键）

问题描述

我是 Python 的新手，在此先感谢您的帮助。

我构建了以下代码（我尝试了以下代码，我在字典中使用了字典）。

这个想法是用值（金发）保留键（hair.color）。在此示例中：删除 Micheal。

代码：

def answers(hair_questions):
    try:
        for i in people:
            if people[i]["hair.color"]==hair_questions:
                print(people[i])
            else:
                del people[i]
            return people[i]
    except:
        print("Doesn´t exist")

answers("brown")

关于人：

people={
 "Anne":
    {
   "gender":"female",
   "skin.color":"white",
  "hair.color":"blonde",
  "hair.shape":"curly"
 }
,
"Michael":
{

  "citizenship":"africa",
  "gender":"male",
  "hair.color":"brown",
  "hair.shape":"curly"


}
,

"Ashley":
    {
  "gender":"female",
  "citizenship":"american",
  "hair.color":"blonde",
  "hair.shape":"curly "
 }

 }

代码仅检查第一个键：在条件下：values(blonde)即 (people[i]["hair.color"]!=brown)它仅适用于 1 个键，然后代码“卡住”

我当前的输出：

"people"=

 "Michael":
{

  "citizenship":"africa",
  "gender":"male",
  "hair.color":"brown",
  "hair.shape":"curly"


}
,

"Ashley":
    {
  "gender":"female",
  "citizenship":"american",
  "hair.color":"blonde",
  "hair.shape":"curly "
 }

相反，我想要：

"people"=

"Michael":
{

  "citizenship":"africa",
  "gender":"male",
  "hair.color":"brown",
  "hair.shape":"curly"

}

对于这种情况，我想要一个输出，（仅）Michael。

标签： pythonstringdictionary

解决方案

迭代 for 循环时不能删除键：

people={
    "Anne":
        {
       "gender":"female",
       "skin.color":"white",
      "hair.color":"blonde",
      "hair.shape":"curly"
     },
    "Michael":
    {
      "citizenship":"africa",
      "gender":"male",
      "hair.color":"brown",
      "hair.shape":"curly"
    },
    "Ashley":
        {
          "gender":"female",
          "citizenship":"american",
          "hair.color":"blonde",
          "hair.shape":"curly "
        }
 }

def answers(hair_questions):
    my_dict = {}
    for i in people:
        if people[i]["hair.color"] in hair_questions:
            my_dict[i] = people[i]
    return  my_dict

print(answers("brown"))

或者

def answers(hair_questions):
    my_list = []
    for i in people:
        if people[i]["hair.color"] not in hair_questions:
            my_list.append(i)

    for i in my_list:
        del people[i]

answers("brown")
print(people)

输出/输出：

{'Michael': {'citizenship': 'africa', 'gender': 'male', 'hair.color': 'brown', 'hair.shape': 'curly'}}

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