摘要:
# -*- coding:utf-8 -*-#常规方法需要指定字典值类型 dic = {'k1': []} dic['k1'].append('alex') #通过collections中的defaultdict()类,为字典值创建默认类型 import collections dic = coll 阅读全文
摘要:
# -*- coding:utf-8 -*-#通过字典和列表实现有序字典 dic = dict({'k1': 'v1', 'k2': 'v2', 'k3': 'v3'})print(dic)print(dic) l1 = ['k1', 'k2', 'k3'] for i in l1: print(d 阅读全文
摘要:
# -*- coding:utf-8 -*-import collections #Counter()类是对字典类的补充,用于计算序列中元素出现的次数,下面用#Counter()类创建对象 obj = collections.Counter('aaaaaaaaaaaaadfdsfdsfdsfccbv 阅读全文