python创建类的注意事项

class Employee:
    '所有员工的基类'
    empCount = 0
    def _init_(self, name, salary):
        self.name = name
        self.salary = salary
        Employee.empCount += 1
    def displayCount(self):
        print('Total Employee %d' %Employee.empCount)
    def displayEmployee(self):
        print('name:',self.name, ',salary:', self.salary)

创建实例时，报错：object takes no parameters
查找原因发现，init前后应该是分别两个“下划线”
修改代码应该是，

class Employee:
    '所有员工的基类'
    empCount = 0
    def __init__(self, name, salary):
        self.name = name
        self.salary = salary
        Employee.empCount += 1
    def displayCount(self):
        print('Total Employee %d' %Employee.empCount)
    def displayEmployee(self):
        print('name:',self.name, ',salary:', self.salary)