为多个类创建调用函数

Question

所以我的代码可以工作了，但是有两行让我感到困惑，而且不太确定要放什么。

代码（标出两行）：

class Person(object):
    numPerson = 0
    def __init__(self,firstName,lastName):
        self.firstName = firstName
        self.lastName = lastName
    def fullName(self):
        print self.firstName +' '+self.lastName

class Employee(Person):
    numEmployee = 0
    def __init__(self,firstName,lastName,pay,employID):
        Person.__init__(self, firstName, lastName)
        self.pay = pay
        self.employID = employID
        Employee.numEmployee += 1

class Programmer(Employee):
    def __init__(self,firstName,lastName,pay,employID,proLang):
        self.proLang = proLang
        Employee.__init__(self, firstName, lastName, pay, employID)

class Manager(Employee):
    def __init__(self,firstName,lastName,pay,employID,progList):
        self.progList = progList
        Employee.__init__(self, firstName, lastName, pay, employID)
    def addProgrammer(self):
        self.progList.append(Programmer.fullName) <------------------- This line
    def removeProgrammer(self):
        if len(self.progList) == 0:
            pass
        else:
            del self.progList[0]
    def printList(self):
        print self.progList

a = Manager('Alfred','Jones',20.00,0001,[])
b = Programmer('James','Smith', 11.75, 0002, 'Java')
a.addProgrammer() <--------------------------------------------- And This line
a.printList()

我正在尝试使用 .addProgramer 方法将程序员的姓名添加到 progList。我一直在尝试不同的组合，这是我得到的最接近的组合。

输出：

[<unbound method Programmer.fullName>]

所以，我不确定 addProgramer 方法中需要包含什么才能正确添加程序员姓名，或者我是否需要在最后的 a.addProgrammer 中添加参数.

Answer 1

这里：

self.progList.append(Programmer.fullName)

您不是在添加程序员的实例，而是在添加程序员 class 的方法。

还有：

def fullName(self):
    print self.firstName +' '+self.lastName

这实际上并不是 return 程序员的名字，它只是将其打印到控制台。要实际输出和使用全名，您需要 return self.firstName + ' ' + self.lastName

同样在该函数中，您还需要指定要添加的程序员：

def addProgrammer(self, added_programmer):
    self.progList.append(added_programmer.fullName()) # Call the function to get the fullname

现在添加程序员：

Alfred = Manager('Alfred','Jones',20.00,0001,[]) #make a manager     
James = Programmer('James','Smith', 11.75, 0002, 'Java') #make a programmer
Alfred.addProgrammer(James) #add the programmer
Alfred.printList()

综合起来：

class Person(object):
    numPerson = 0
    def __init__(self,firstName,lastName):
        self.firstName = firstName
        self.lastName = lastName
    def fullName(self):
        return self.firstName +' '+self.lastName

class Employee(Person):
    numEmployee = 0
    def __init__(self,firstName,lastName,pay,employID):
        Person.__init__(self, firstName, lastName)
        self.pay = pay
        self.employID = employID
        Employee.numEmployee += 1

class Programmer(Employee):
    def __init__(self,firstName,lastName,pay,employID,proLang):
        self.proLang = proLang
        Employee.__init__(self, firstName, lastName, pay, employID)

class Manager(Employee):
    def __init__(self,firstName,lastName,pay,employID,progList):
        self.progList = progList
        Employee.__init__(self, firstName, lastName, pay, employID)
    def addProgrammer(self, added_programmer):
        self.progList.append(added_programmer.fullName()) # Call the function to get the fullname
    def removeProgrammer(self):
        if len(self.progList) == 0:
            pass
        else:
            del self.progList[0]
    def printList(self):
        print self.progList

Alfred = Manager('Alfred','Jones',20.00,1,[])       
James = Programmer('James','Smith', 11.75, 2, 'Java')
Alfred.addProgrammer(James)
Alfred.printList()

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