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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