Python classes and inheritance explained

Compared with inheritance writing in C++, Python is more concise and efficient. Here is a simple Python inheritance example. EClass Member:

DEF __init __ (Self, name, Age):

Self.name = name

Self.age = Age

Print 'Member init:%s'%self.name

DEF TELL ( Self): in Print 'Name:%S, Age:%D'%(Self.name, Self.age),

Class Student (Member):

DEF __init __ (Self, Name, Age, Marks):

                                                             ‐            Member.__init__                                                            self.marks                                              

                                                                                                                                                                             def  tell(self):                                   " Member.__init__(self, name, age)

                                                                           salary = salary

Print 'Teacher Init:%s'%seld.name

deftell (self):

member.tell (self)

print' salary:%d'%seld.salarly

s = Student('Tom', 20, 80)

t = Teacher('Mrs.Huang', 30, 50000)

members = [s, t]

for mem in members:

mem.tell()

Running effect:

[root@localhost hhl]

Member init:Tom

Student init:Tom

Member init:Mrs.Huang

Teacher init:Mrs.Huang

Name:Tom,Age: 20 Marks :80

Name:Mrs.Huang,Age:30 Salary:50000

We also write a C++ example with the same effect:

#include

#include

using namespace std ;

class Member

{ public:

Member(char *n, int a);

void tell();

private:

char name[10];

int age;

};

Member::Member(char *n, int a)

{

memcpy(name, n, sizeof(name));

age = a;

cout<< init:" <

}

void Member::tell()

{

    cout<<"Name:"<

}   

class Student:public Member   

{   

public:   

    Student(char *n, int a, int m);   

    void tell_s();   

private:   

    int marks;   

};   

Student::Student(char *n, int a, int m):Member(n, a)   

{   

    marks = m;   

    cout<<"Student init:"<

}   

void Student::tell_s()   

{   

    Member::tell();   

    cout<<"Marks:"<

}   

class Teacher:public Member   

{   

public:   

    Teacher(char *n, int a, int s);   

    void tell_t();   

private:   

    int salary;   

};   

Teacher::Teacher(char *n, int a, int s):Member(n, a)   

{   

    salary = s;   

    cout<<"Teacher init:"<

}   

void Teacher::tell_t()   

{   

    Member::tell();   

    cout<<"Salary:"<

}   

int main(void)   

{   

    Student s("Tom", 20, 80);   

    Teacher t("Mrs.Huang", 30, 50000);   

    s.tell_s();   

    t.tell_t();   

    return 0;   

}  

运行效果：

[root@localhost hhl]  

Member init:Tom   

Student init:Tom   

Member init:Mrs.Huang   

Teacher init:Mrs.Huang   

Name:Tom,Age:20,Marks:80   

Name:Mrs.Huang,Age:30,Salary:50000  

这两者的运行效果是一样的，但是python更简洁些。。。

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