54 lines
1.1 KiB
Python
54 lines
1.1 KiB
Python
|
"""
|
||
|
|
魔术方法 - 哈希存储 / 上下文语法
|
||
|
|
"""
|
||
|
|
from random import randint
|
||
|
|
|
||
|
|
|
||
|
|
class Student():
|
||
|
|
"""学生"""
|
||
|
|
|
||
|
|
def __init__(self, stuid, name, gender):
|
||
|
|
self.stuid = stuid
|
||
|
|
self.name = name
|
||
|
|
self.gender = gender
|
||
|
|
|
||
|
|
def __enter__(self):
|
||
|
|
return self
|
||
|
|
|
||
|
|
def __exit__(self, exception_type, exception_value, traceback):
|
||
|
|
pass
|
||
|
|
|
||
|
|
def __hash__(self):
|
||
|
|
return hash(self.stuid)
|
||
|
|
|
||
|
|
def __eq__(self, other):
|
||
|
|
return self.stuid == other.stuid
|
||
|
|
|
||
|
|
def __repr__(self):
|
||
|
|
return f'{self.stuid}: {self.name}'
|
||
|
|
|
||
|
|
|
||
|
|
def create_student():
|
||
|
|
return Student(randint(1001, 9999),
|
||
|
|
"无名氏",
|
||
|
|
"男" if randint(0, 1) == 1 else "女")
|
||
|
|
|
||
|
|
|
||
|
|
def main():
|
||
|
|
"""主函数"""
|
||
|
|
students = {
|
||
|
|
Student(1001, "王大锤", "男"),
|
||
|
|
Student(1001, "王小锤", "男"),
|
||
|
|
Student(1003, "王捶捶", "女")
|
||
|
|
}
|
||
|
|
print(len(students))
|
||
|
|
print(students)
|
||
|
|
with create_student() as stu:
|
||
|
|
print(stu.stuid)
|
||
|
|
print(stu.name)
|
||
|
|
print(stu.gender)
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == '__main__':
|
||
|
|
main()
|