python3遍历字典

  在领扣的刷题过程中，经常需要使用到python中字典进行映射或者计数（类似于Java和C++中的map的功能），并且有的时候需要对字典进行遍历进行进一步的操作，下面是常见的字典的遍历方法：

import collections

if __name__ == '__main__':
    dic = [1, 1, 2, 4, 3, 10, 3, 2]
    # 使用collections.Counter方法将列表转为字典的形式并且对其计数
    dic = collections.Counter(dic)
    # print(dic)
    # 遍历字典
    for cur in dic.items():
        print(cur[0], cur[1], end="\n")

import collections

if __name__ == '__main__':
    dic = [1, 1, 2, 4, 3, 10, 3, 2]
    # 使用collections.Counter方法将列表转为字典的形式并且对其计数
    dic = collections.Counter(dic)
    # print(dic)
    # 遍历字典
    for key, value in dic.items():
        print(key, value, end="\n")

import collections

if __name__ == '__main__':
    dic = [1, 1, 2, 4, 3, 10, 3, 2]
    dic = collections.Counter(dic)
    # 遍历字典的键
    for key in dic.keys():
        print(key, end="\n")
    # 遍历字典的值
    for value in dic.values():
        print(value, end="\n")