#字典 dict { }
#key-value pair
哈希算法支持
字典中的内容并不是按照输入的先后顺序存储,而是按照哈希算法计算得到的值存储。并且字典不可以用下标来访问
字典中的值可以是任意数据类型,键必须是可哈希类型(列表list、字典dict不是,int\str\float\tuple是)
可修改数据类型
#字符串格式化
sText="Marry have {} lambs, they are {n1}, {n2} and {}".format(3, 'cot', n2='happy', n1='nauty')
#函数与抽象
形参
实参
关键字参数
任意数量参数:
def myprint(title,*contents):
print(title,":")
for i in contents:
print("\t",x)
myprint("Read-only data types","int","float","str","tuple","bytes")
参数分配
def myprint(title,name,gender,age,salary)
......
dora=("dora's information is",'dora','female',26,3200)
myprint(*dora)
dora2=dict("dora's information is",'dora','female',26,3200)
myprint("dora's information is:",**dora2)