class Student(object):
count = 0
def __init__(self, name):
    Student.count += 1
    self.name = name

print(Student("tom1").count)
print(Student("tom2").count)
print(Student("tom3").count)
print(Student("tom4").count)
print(Student("tom5").count)
print(Student("tom6").count)
print(Student("tom7").count)
print(Student("tom8").count)

#结果
1
2
3
4
5
6
7
8