python中的数据类型

[QiYongchuan]

python中的数据结构：

Data stractures

• list - sequences of mutable values //列表可以改变[]
• tuple - sequence of immutable values //元组不可改变()
• set - collection of unique values //集合不可以重复()
• dict - collection of key-value pairs // 字典键值对{}

list 列表

# define a list of names
names = ["harry","Ron","heri","Ginny"]

dic 字典

# define a dic
houses = {"harry":"Gry","Draco":"Sly"}
houses['Herminoe'] = "Gry"

tuble 元组

coordinateX = 10.0
coordinateY = 20.0

coordinate = (10.0,20,0)

#即相当于直接可以用一个变量来代表两个变量

set

#create an empty set

s = set() 

# add elements

s.add(1)
s.add(2)
s.add(3)
s.add(4)
s.add(4)

s.remove(1)
print(s)   // 234