numbers = {1, 3, 4, 5, 6, 5, 4, 4, 7, 8}
print(numbers)
print(numbers)

student_python = {"xiaoWang", "xiaoMing", "lvChaBiao", "baiLianHua"}
student_golang = {"xiaoWang", "beimenchuixue", "ximenchuifeng"}print("only study python student: ", student_python - student_golang)
print("study python and golang student: ", student_python & student_golang)
print("total students : ", student_python | student_golang)

students = {"BeiMenChuiXue","QiNiuYun", "BoKeYuan"}
# 添加一个元素
students.add("JinRiTouTiao")
print(students)# 添加多个元素
students.update(["TengXun", "DouYing"])
print(students)# 删除一项
students.remove("TengXun")
print(students)# 安全删除
print(students)
status = students.discard("JinRiTouTiao")
if status == None:print("rm success")
else:print("rm fail")
print(students)

python_class = {"BeiMenChuiXue", "QiNiuYun", "AliYun"}
golang_class = {"BeiMenChuiXue", "QiNiuYun"}# 判断子集
if golang_class.issubset(python_class):print("golang_class -> python_class")
else:print("golang_class !-> python_class")# 判断父集
if python_class.issuperset(golang_class):print("python_class <- golang_class")
else:print("python_class !<- golang_class")# 判断交集，无交集则返回真，或者有空交集返回真
if python_class.isdisjoint(golang_class):print("陌路")
else:print(python_class & golang_class)

student_score = {"xiaoWang": 99,"xiaoLi": 77,"beimenchuixue": 99,"lvChaBiao": 90,"ximenchuifeng": 88
}print(student_score.get("beimenchuixue", None))
print(student_score.pop("lvChaBiao"))
student_score.update({"xiaoWang": 66,
})
print(student_score)
print(student_score.items())
print(student_score.keys())
print(student_score.values())

student_score = {"xiaoWang": 99,"xiaoLi": 77,"beimenchuixue": 99,"lvChaBiao": 90,"ximenchuifeng": 88
}print("xiaoWang" in student_score)
print(99 in student_score)