字典
#创建字典
student=dict(name='柠柠',age=1)
print(student)
s={'柠柠':1}
print(s)
Null={}
print(Null)
#元素获取
print(s.get('柠柠'))
print(s['柠柠'])
#get()和[]获取的区别
#print(s['Cecilia'])#报错
print(s.get('Cecilia'))#输出None
print(s.get('Cecilia',3))#设置默认值返回
#key的判断
print('柠柠' in s)
print('柠柠' not in s)
#删除
del s['柠柠']
print(s)
s.clear()
print(s)
#增加
s['Lia']=5
print(s)
#修改
s['Lia']=7
print(s)
#获取视图
keys=s.keys()
print(keys)
print(type(keys))
print(list(keys))
values=s.values()
print(values)
print(type(values))
print(list(values))
items=s.items()
print(items)
print(type(items))
print(list(items))
#遍历
for item in s:
print(item)
print(s.get(item))
print(s[item])
#字典生成式
name=['Apple','Banana','Pear']
price=[3,5,7]
s={name:price for name,price in z ip(name,price)}
print(s)
