Python集合的常用方法，,注释很详细colle

Python集合的常用方法，,注释很详细colle

注释很详细

collection={1,2,"apple","orange","cat"}# 查看一个数是否在集合中  inprint("Tom 是否在集合中：","Tome" in collection)print("apple 是否在集合中：","apple" in collection)# 集合初始化时用set()   pets={}是代表初始化了一个字典集pets=set()# 集合添加元素用add()方法，删除元素用discard()pets.add("dog")pets.add("cat")pets.add("bird")pets.add("zebra")print(pets)pets.discard("zebra")print(pets)# 集合的 与  或  非print("并集：",pets | collection )print("交集：",pets & collection)print("异或：",pets - collection)# 将一个字典集的keys转为集合，用set(字典集名)dict1={"cat":1,"dog":2,"bird":3}print(set(dict1))# 向一个集合中添加另一个集合用update()方法collection.update([12,13,14])print(collection)

for i in set("apple"):    print(i,end=",")print()for j in "apple":    print(j,end=",")

输出结果”

E:\Program_Files\PythonAll\workspace\MyLearnProject\venv\Scripts\python.exe E:/Program_Files/PythonAll/workspace/MyLearnProject/pythonCode/collection/collectionFunc.pyTom 是否在集合中： Falseapple 是否在集合中： True{‘dog‘, ‘cat‘, ‘bird‘, ‘zebra‘}{‘dog‘, ‘cat‘, ‘bird‘}并集： {1, 2, ‘bird‘, ‘apple‘, ‘orange‘, ‘dog‘, ‘cat‘}交集： {‘cat‘}异或： {‘dog‘, ‘bird‘}{‘dog‘, ‘cat‘, ‘bird‘}{1, 2, 12, 13, 14, ‘apple‘, ‘cat‘, ‘orange‘}l,p,e,a,a,p,p,l,e,Process finished with exit code 0

Python集合的常用方法