自己代码

'''import math

class Point:

def reset(self) :

self.x=0;

self.y=0;

def Move(self,x,y) :

self.x=x;

self.y=y;

def Reset1(self):

self.move(0, 0);

def Calculate(self,other_point):

return math.sqrt(

(self.x-other_point.x)**2+(self.y-other_point.y)**2);

P1 = Point();

P2 = Point();

P1.reset();

P2.Move(5, 0);

print(P1.x, P1.y);

assert(P2.Calculate (P1)==P1.Calculate (P2));

P1.Move (9, 3);

print(P1.Calculate(P2));#self是P1然后参数

print(P1.Calculate(P1)); '''

class SecretString:

def __init__(self,plain_string,pass_phrase):

self.__plain_string = plain_string;

self.__pass_phrase = pass_phrase;

def decrypt(self,pass_phrase):

if pass_phrase==self.__pass_phrase:

return self.plain_string;

else:

return

secretString=SecretString("ACME: TOP Secret", "123456")

print(secretString.decrypt("antwep"))

#print(secretString.__plain_text)

print(secretString._SecretString__plain_string)

#名称改编  对于scretString 这个对象来说 我想访问内部的__plain_string  不能直接写成secretString.__plain_string

# 而是必须写成这样的secretString._SecretString__plain_string 也就是说是要 对象名.类名变量名  类名和变量名直接连接无分隔符