diff --git a/pythonProject/数据类型/集合/1.py b/pythonProject/数据类型/集合/1.py
index adbd504..535c8a7 100644
--- a/pythonProject/数据类型/集合/1.py
+++ b/pythonProject/数据类型/集合/1.py
@@ -1,3 +1,4 @@
+# 无序，不可重复，可扩展
 # 不能通过索引访问元素
 # 自动去重
 # 元素必须是可哈希的（如 int, str, tuple），不能包含 list、dict、set 等可变类型
diff --git a/pythonProject/数据类型/集合/2.py b/pythonProject/数据类型/集合/2.py
index e69de29..e0f01fa 100644
--- a/pythonProject/数据类型/集合/2.py
+++ b/pythonProject/数据类型/集合/2.py
@@ -0,0 +1,3 @@
+s = {1,2}
+s.add(3) # 添加元素
+print(s)
\ No newline at end of file
diff --git a/pythonProject/数据类型/集合/3.py b/pythonProject/数据类型/集合/3.py
new file mode 100644
index 0000000..96a50c6
--- /dev/null
+++ b/pythonProject/数据类型/集合/3.py
@@ -0,0 +1,3 @@
+s = {1,2,3}
+s.remove(3) # 删除元素 若不存在则报 KeyError
+print(s)
\ No newline at end of file
diff --git a/pythonProject/数据类型/集合/4.py b/pythonProject/数据类型/集合/4.py
new file mode 100644
index 0000000..5594b90
--- /dev/null
+++ b/pythonProject/数据类型/集合/4.py
@@ -0,0 +1,3 @@
+s = {1,2,3}
+s.discard(3) # 删除元素 若不存在也不报错
+print(s)
\ No newline at end of file
diff --git a/pythonProject/数据类型/集合/5.py b/pythonProject/数据类型/集合/5.py
new file mode 100644
index 0000000..de4c22f
--- /dev/null
+++ b/pythonProject/数据类型/集合/5.py
@@ -0,0 +1,3 @@
+s = {1,2,3}
+s.pop() # 随机弹出一个元素
+print(s)
\ No newline at end of file