PageRank Power Iteration

#!-*- coding: utf-8 -*-
'''
@author : Hasan Mahmud Tuhin
          19CS-JD14M
@Description:
            This code finds page rank of a graph using power iteration method.
'''

class PageRank:

    def __init__(self,n):
        self.epsilone = 0.000000000001
        self.Node = n
        self.matrix = [ [0] * self.Node ] * self.Node;
        print(self.matrix)
        self.rank  =[]
        self.old_rank = [0] * self.Node
        for i in range(0,self.Node):
            self.rank.append( 1 / self.Node)
            #self.old_rank.append(1/self.Node)

    def iteration(self):
        try:
            product = []
            for i in range(0,self.Node):
                self.old_rank[i] = self.rank[i]
                product.append(0)

            #- begain multiplication
            for i in range(0,self.Node):
                for j in range(0,self.Node):
                    product[i] += self.matrix[i][j] * self.rank[j]

            #-- copy rank matrix
            for i in range(0,self.Node):
                self.rank[0] = product[0]
        except Exception as e:
            print("Error on calculation power iteration .{}".format(e))

    def stop(self):
        try:
            for i in range(0,self.Node):
                if abs(self.rank[i] - self.old_rank[i]) <  self.epsilone:
                    continue
                else:
                    return False
            return True
        except:
            pass

    def input_values(self):
        try:
            print("Enter values of Matrix");
            for i in range(0,self.Node):
                #self.matrix[i].append([])
                for j in range(0,self.Node):
                    print("Enter value for matrix[{}][{}] : ".format(i,j),end='');
                    self.matrix[i][j] = float( input() )
        except Exception as e:
            print("Error in input. {}".format(e))


    def show_rank(self):
        try:
            print("\nPage Rank is :\n")
            for i in range(0,self.Node):
                print("[{}]".format(self.rank[i]))
        except:
            pass

    def show_old(self):
        print("old Rank matrix is: ")
        for i in range(0,self.Node):
            print("[{}]".format(self.old_rank[i]))


if __name__ == "__main__":
    print("Enter Number of Nodes")
    N = int(input())

    pg = PageRank(N)

    pg.input_values()
    #-- do iteration 50 times, if no difference between two
    #--- iteration then break
    for i in range(0,50):
        pg.iteration()
        print("{} Iteration Done".format(i));
        if pg.stop():
            print("Stop, Because Two interation are same")
            break
        pg.show_rank()
        #pg.show_old()