Python-сообщество

import random,  math,  string

class RSA:
    def __init__(self):
        self.lets=string.letters+' '
        self.strength=2
        self.text=''
        self.res=[]
        self.keys=[]
    def fact(self, x):
        res=1
        for i in range(1,x+1):
            res*=i
        return res
    def is_easy(self, n):
        if (self.fact(n-1)+1)%n==0:
            return True
        else:
            return False
    def NOD(self, a,b):
        while b:
            a,b=b,a%b
        return a
    def findPrimes(self):
        self.p=4
        self.q=4
        while not self.is_easy(self.p):
            self.p=random.randint(1*self.strength,  10*self.strength)
        while not self.is_easy(self.q):
            self.q=random.randint(1*self.strength,  10*self.strength)
        self.n=self.p*self.q
        self.m=(self.p-1)*(self.q-1)
        self.d=4
        while abs(self.NOD(self.d, self.m))!=1:
            self.d=random.randint(10*self.strength,1000*self.strength)
        self.e=0
        for self.e in range(99998,  0,  -1):
            if (self.e*self.d)%self.m==1:
                break
    def encrypt(self):
        self.text=[self.lets.index(n) for n in self.text]
        for i in self.text:
            self.res.append(int(i)**self.e%self.n)
        #print "Open key e=%i n=%i"%(self.e,  self.n)
        #print "Private key d=%i n=%i"%(self.d,  self.n)
        #print "Cryptophrase = %s"%(' '.join([str(i) for i in self.res]))
        return {'e':self.e,  'd':self.d,  'n':self.n, 'crypto':str(' '.join([str(i) for i in self.res]))}

    def decrypt(self):
        self.n=self.keys[0][1]
        self.d=self.keys[1][0]
        for i in self.text.split(' '):
            print int(i)**int(self.d)%int(self.n)
            self.res+=(self.lets[int(i)**int(self.d)%int(self.n)])
        return ''.join([i for i in self.res])

while 1:
    my=RSA()
    my.text=raw_input('Enter text: ')
    started=my.text
    my.findPrimes()
    result=my.encrypt()

    my=RSA()
    my.text=result['crypto']
    my.keys=[[result['e'],  result['n']],  [result['d'],  result['n']]]
    l=my.decrypt()
    if l!=started:
        print "Started: %s"%started
        print "e=%i d=%i n=%i"%(result['e'],  result['d'],  result['n'])
        print "Ended: %s"%l
    raw_input()