Question

假设我有一个：

dict = {"Main": ["Tammy","Elisha","Julius"],
        "Elisha": ["Kenneth"]
       }

上下文就像一个队列系统。 Main 是普通队列。而“Elisha:[Kenneth]”就像一个切线队列。您可以想象，当 Elisha 决定将他的朋友 Kenneth 带入队列时，每个人都在正常排队等候 MacDonald。

我如何将 "Kenneth" 附加到 "Main":"Elisha" 以便在我打印 dict['Main'] 时它会返回以下预期输出：

预期输出：[Tammy, Elisha, Kenneth, Julius ]

如果以利沙决定引入另一个朋友，“以利沙”：[“妮可”]。那么预期的输出将是：

预期输出：[ Tammy, Elisha, Kenneth, Nicole, Julius ]

我尝试在谷歌上搜索 append，但是 append 对字典不起作用，而只能在列表中使用。

我试过了：

dict['Main'].value("Elisha").append("Kenneth")

但它返回了错误。

Answer 1

您需要为您的案例使用 coef<-ldply(S_models, coef)：

extend

输出：

dic = {"Main":["Tammy","Elisha","Julius"],
        "Elisha": ["Kenneth", "Nicole"]
       }
dic["Main"].extend(dic["Elisha"])
print(dic["Main"])

另外，避免对对象名称使用关键字 ['Tammy', 'Elisha', 'Julius', 'Kenneth', 'Nicole'] 以避免影响构建行为。

更新：

要在特定的 dict 处插入，您可以先使用 index 方法获取要插入的索引，然后使用切片插入新列表：

index()

Answer 2

可以递归打印队列工作原理：

创建一个空队列
从 Main 队列中的第一个人开始
将该人添加到1中提到的空队列
检查是否有那个人的朋友，如果有
将他们添加到 1 中提到的队列中，并检查他们的朋友是否存在

d = {"Main":["Tammy","Elisha","Julius"],

        "Elisha": ["Kenneth"]
       }

def get_flattened_queue(data, key, flattened_queue):
    members = data[key]
    for each_member in members:
        flattened_queue.append(each_member)
        if each_member in data.keys():
            get_flattened_queue(data, each_member, flattened_queue)
    return flattened_queue

flattened_queue = []
get_flattened_queue(d, 'Main', flattened_queue)

print(flattened_queue)

['Tammy', 'Elisha', 'Kenneth', 'Julius']

现在假设 Elisa 带来 Nicole

d = {"Main":["Tammy","Elisha","Julius"],

        "Elisha": ["Kenneth"]
       }

def get_flattened_queue(data, key, flattened_queue):
    members = data[key]
    for each_member in members:
        flattened_queue.append(each_member)
        if each_member in data.keys():
            get_flattened_queue(data, each_member, flattened_queue)
    return flattened_queue

# Here she brings Nicole
d['Elisha'].append('Nicole')

#{"Main":["Tammy","Elisha","Julius"],
#        "Elisha": ["Kenneth", "Nicole"]
#       }

flattened_queue = []
get_flattened_queue(d, 'Main', flattened_queue)

print(flattened_queue)

['Tammy', 'Elisha', 'Kenneth', 'Nicole', 'Julius']

d = {"Main":["Tammy","Elisha","Julius"],

        "Elisha": ["Kenneth"]
       }

def get_flattened_queue(data, key, flattened_queue):
    members = data[key]
    for each_member in members:
        flattened_queue.append(each_member)
        if each_member in data.keys():
            get_flattened_queue(data, each_member, flattened_queue)
    return flattened_queue

# Here she brings Nicole
d['Elisha'].append('Nicole')

#{"Main":["Tammy","Elisha","Julius"],
#        "Elisha": ["Kenneth", "Nicole"]
#       }

# Nicole brings Epsi95
d['Nicole'] = ['Epsi95']

flattened_queue = []
get_flattened_queue(d, 'Main', flattened_queue)

print(flattened_queue)

{'Main': ['Tammy', 'Elisha', 'Julius'],
 'Elisha': ['Kenneth', 'Nicole'],
 'Nicole': ['Epsi95']}


['Tammy', 'Elisha', 'Kenneth', 'Nicole', 'Epsi95', 'Julius']

如何将字典值附加到现有字典值？

2 个答案: