Reverse an array of stings in python using a class -

i'm trying learn class in python , here exercise have made myself.i want create class can sing song regularly , sing song in reveres. here typed:

class song(object):     def __init__(self, lyrics):         self.lyrics = lyrics      def sing_me_a_song(self):         line in self.lyrics:             print line     def sing_me_a_reverse_song_1(self):         self.lyrics.reverse()             line in self.lyrics:                 print line     def sing_me_a_reverse_song_2(self):         line in reversed(self.lyrics):             print line     def sing_me_a_reverse_song_3(self):         line in self.lyrics[::-1]:             print line  bulls_in_parade = song(["they rally around family",                     "with pockets full of shells"]) #sing me                      bulls_in_parade.sing_me_a_song()  #1st method of reversing: bulls_in_parade.sing_me_a_reverse_song_1()  #2nd method of reversing:    bulls_in_parade.sing_me_a_reverse_song_2()  #3rd method of reversing:    bulls_in_parade.sing_me_a_reverse_song_3()              

the first method of reversing works well, don't know why can't 2 last methods work.

here in output:

they rally around family pockets full of shells ---------- pockets full of shells rally around family ---------- rally around family pockets full of shells ---------- rally around family pockets full of shells 

and here want see in output:

they rally around family pockets full of shells ---------- pockets full of shells rally around family ---------- pockets full of shells rally around family ---------- pockets full of shells rally around family 

if define last 2 methods in separated function, work can't understand why don't work in class.

i thing problem should 'calling' lyrics :

self.lyrics() 

if me out solving this.

and have add i'm using python 2.7

well, work..

the problem changed data member @ first time. typed self.lyrics.revese(), since then, list stays reversed.

you can fix method this:

def sing_me_a_reverse_song_1(self):     tmplyrics = self.lyrics[:]     tmplyrics.reverse()     line in tmplyrics:         print line 

note:

don't tmplyrics = self.lyrics because python passes list reference , right way tmplyrics = self.lyrics[:]