List note

POEM = [ ' Yao ' , ' Yao ' , ' cold ' , ' mountain ' , ' channel ' ]
 Print (POEM [-2]) # listing negative index 
# slicing 
Print (POEM [. 1 :])
 Print (POEM [2 :. 3:. 1 ])
 Print (POEM [2:. 3 ])
 Print (POEM [:: -. 1]) # flashback 
Print (POEM [:])   # a copy 
# modifications 
Print ( ' before modification: ' , POEM)
# 1. Direct index 
POEM [0] = ' ah ' 
POEM [ . 4] = ' of He ' 
Print ( ' modified: ' , POEM)
 # 2. Modify by slicing 
Print ( ' slice before modification: ' , POEM) 
POEM [0: 2] = [ ' good ' , ' and ' ]    # using the new element in place of the old elements 
poem [0: 2] = [ ' good ' , ' and ' , ' further ' ] # many elements inserted list 
poem [0:0]=[' Ha ' ] # to the index of the 0-insertion element 

Print ( ' sliced Review: ' , POEM)
 # delete del 
poem1 = [ ' off ' , ' off ' , ' to ' , ' warning ' , ' not ' ]
 del poem1 [0: 2] # deleted index position 
Print (poem1)
 del poem1 [:: 2] # deleted in steps 2 
Print (poem1)
 # list traversal 


# traversed by the while loop 
lib = [ 'Luzi ' , ' HH ' , ' Dou ' , ' xixi ' , ' huhu ' ] 
I = 0
 the while I < len (lib):
     Print (lib [I]) 
    I + =. 1 # Loop through by for for S in lib :
     Print (S)