class Employee:
 pass


class EmployeeManager:
 def __init__(self, employees):
 self.all_employee = employees

 def __iter__(self):
 for i in range(len(self.all_employee)):
 yield self.all_employee[i] # 暂时离开 再次执行


manager = EmployeeManager([Employee(), Employee(), Employee()])
for element in manager:
 print(element)