aList = [4, 3, 2]

# appending values to the list
aList.append( 9 )
print( aList )

# appending more values at once to the list
# equals to extending it by a whole another list
aList.extend( [8,7,6] )
print( aList )

# INCORRECT appending more values at once to the list
aList.append( [8,7,6] )
print( 'OOPS!:', aList )