list1 = [23,45,67,98,101]
list.index(67)
>> 2
list.extend([1,2])
>> list1 = [23,45,67,98,101,1,2]
list.insert( 3, 88 )
>> list1 = [23,45,67,88,98,101,1,2]
list1.sort()
>> list1 = [1,2,23,45,67,88,98,101]
list1.reverse()
>> list1 = [101,98,88,67,45,23,2,1]