字典类型

字典类型

字典类型：大括号内以逗号分割键值对(key(描述意义):value)的形式存储数据

dic1 = {'name':'bob','age':16,'height':140,'weight':180,'hobby_list':['debugging','sing','baleiwu']}

dic2 = dict()
print(dic2)         # {}

取值

print(dic1['name'])      # bob
print(dic1['hobby_list'][2])    # baleiwu

print(dic1.get('name1'))    # None
                            # 如果没有key,则取None,可以自定义没有值能取到的值
print(dic1.get('hobby_list')[2])    #baleiwu

常用方法

# 输出key
for i in dic1:
    print(i)

# 输出值
for i in dic1.values():
    print(i)

# 输出键值对
for i in dic1.items():
    print(i)

# 删除值
dic1.pop('name')
print(dic1)    

# 添加值
dic1.setdefault('name','bob')
print(dic1)