Python 为什么使用循环打印时订单排序不正确？

我试图运行这个循环，但是结果的顺序是这样的

student_name = {"Karrie", "Freya", "Bruno"}

for name in student_name:
print("The student name is {0}".format(name))

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集合是无序的。如果要查找有序集合，请使用以下列表：

The student name is Freya
The student name is Karrie
The student name is Bruno

使用已排序的：

student_name = ["Karrie", "Freya", "Bruno"]

for name in student_name:
    print("The student name is {0}".format(name))

集合像字典一样无序。根据需求使用列表/元组。。

student_name = {"Karrie", "Freya", "Bruno"}
for name in sorted(student_name):
    print("The student name is {0}".format(name))