集合中元素的顺序是未定义的，尽管它可能包含各种元素。可以添加和删除集合的元素，可以迭代集合的元素，可以对集合执行各种标准操作（并集，交集，差异）。通过将内置set()函数与可迭代对象或序列一起使用来创建集合，方法是将序列放在花括号内，用“逗号”分隔：

# Python program to demonstrate

# Creation of Set in Python

# Creating a Set

set1 = set()

print("Intial blank Set: ")

print(set1)

# Creating a Set with

# the use of a String

set1 = set("GeeksForGeeks")

print("\nSet with the use of String: ")

print(set1)

# Creating a Set with

# the use of Constructor

# (Using object to Store String)

String = 'GeeksForGeeks'

set1 = set(String)

print("\nSet with the use of an Object: " )

print(set1)

# Creating a Set with

# the use of a List

set1 = set(["Geeks", "For", "Geeks"])

print("\nSet with the use of List: ")

print(set1)

# Creating a Set with

# a List of Numbers

# (Having duplicate values)

set1 = set([1, 2, 4, 4, 3, 3, 3, 6, 5])

print("\nSet with the use of Numbers: ")

print(set1)

# Creating a Set with

# a mixed type of values

# (Having numbers and strings)

set1 = set([1, 2, 'Geeks', 4, 'For', 6, 'Geeks'])

print("\nSet with the use of Mixed Values")

print(set1)