【人工智能】python之set集合练习

上一节学习了元组，虽然在Java中我没有遇到过元组的概念，但是通过学习现在还是了解了，元组是一个有序的不可变更的集合，可以说只要愿意学，就能知道的多一点。这一次来练习一个python中的set，看看它是不是和Java中的set是一样的

# Clase en vídeo: https://youtu.be/Kp4Mvapo5kc?t=16335

### Sets ###

# Definición

my_set = set()
my_other_set = {}

print(type(my_set))
print(type(my_other_set))  # Inicialmente es un diccionario

my_other_set = {"Brais", "Moure", 35}
print(type(my_other_set))

print(len(my_other_set))

# Inserción

my_other_set.add("MoureDev")

print(my_other_set)  # Un set no es una estructura ordenada

my_other_set.add("MoureDev")  # Un set no admite repetidos

print(my_other_set)

# Búsqueda

print("Moure" in my_other_set)
print("Mouri" in my_other_set)

# Eliminación

my_other_set.remove("Moure")
print(my_other_set)

my_other_set.clear()
print(len(my_other_set))

del my_other_set
# print(my_other_set) NameError: name 'my_other_set' is not defined

# Transformación

my_set = {"Brais", "Moure", 35}
my_list = list(my_set)
print(my_list)
print(my_list[0])

my_other_set = {"Kotlin", "Swift", "Python"}

# Otras operaciones

my_new_set = my_set.union(my_other_set)
print(my_new_set.union(my_new_set).union(my_set).union({"JavaScript", "C#"}))
print(my_new_set.difference(my_set))

 我们来运行这段代码

C:\Users\lenovo\AppData\Local\Programs\Python\Python39\python.exe D:\workspace\Hello-Python\Basic\06_sets.py 
<class 'set'>
<class 'dict'>
<class 'set'>
3
{'Brais', 35, 'MoureDev', 'Moure'}
{'Brais', 35, 'MoureDev', 'Moure'}
True
False
{'Brais', 35, 'MoureDev'}
0
['Brais', 35, 'Moure']
Brais
{'Brais', 35, 'Swift', 'JavaScript', 'C#', 'Moure', 'Python', 'Kotlin'}
{'Swift', 'Python', 'Kotlin'}

Process finished with exit code 0
 

通过运行结果，我们来分析代码

#定义一个集合

my_set = set()
my_other_set = {}

#打印集合的类型

print(type(my_set))
print(type(my_other_set))  # Inicialmente es un diccionario

#集合赋值，并打印集合的类型和长度

my_other_set = {"Brais", "Moure", 35}
print(type(my_other_set))

print(len(my_other_set))

#通过add()函数往集合中添加元素，并打印出新的集合的内容

my_other_set.add("MoureDev")

print(my_other_set)  # Un set no es una estructura ordenada

#这两行我看不出是什么意思，所以我打印了个分割线方便查看

print(  "--------111111-----")
print("Moure" in my_other_set)
print(  "--------22222-----")
print("Mouri" in my_other_set)

那就是判断某个元素是否在集合中并返回布尔值

#移除集合中的元素并打印

my_other_set.remove("Moure")
print(my_other_set)

#清除集合中元素
my_other_set.clear()
print(len(my_other_set))

my_set = {"Brais", "Moure", 35}
#集合转换成数组
my_list = list(my_set)
print(my_list)
print(my_list[0])