python_list.py

"""
When we talk about storing multiple values in a container-like data-structure, the first thing that comes to mind is a list.

You can initialize a list as

>>> arr = list()
or simply
>>> arr = []
or with a few elements as

>>> arr = [1,2,3]
Elements can be accessed easily like you do in most programming languages.

>>> print arr[0]
1
>>> print arr[0] + arr[1] + arr[2]
6
Lists in python are very versatile. If you ask what you can add in a Python List, the answer is practically anything!

In python you can create a list of any object, be it string, integers, or even lists. You can even add multiple types in a single list! Isn't that exciting?

Let's look at some of the methods you can use on List.

1.) append(x) 
Adds a single element 'x' to the end of list.

>>> arr.append(9)   
>>> print arr  
[1, 2, 3, 9]
2.) extend(L) 
Merges another list 'L' to the end.

>>> arr.extend([10,11])
>>> print arr
[1, 2, 3, 9, 10, 11]
3.) insert (i,x) 
Inserts element 'x' at position 'i'.

>>> arr.insert(3,7)
>>> print arr
[1, 2, 3, 7, 9, 10, 11]
4.) remove(x) 
Removes the first occurrence of element x.

>>> arr.remove(10)  
>>> arr  
[1, 2, 3, 7, 9, 11]
5.) pop() 
Removes the last element of list. If an argument is passed, that index item is popped out.

>>> temp = arr.pop()
>>> print temp 
11
6.) index(x) 
Returns the first index of a value in the list. Throws error if it is not found.

>>> temp = arr.index(3)
>>> print temp
2
7.) count(x) 
Counts the number of occurrences of an element x.

>>> temp = arr.count(1)
>>> print temp
1
8.) sort() 
Sorts the list.

>>> arr.sort()
>>> print arr
[1, 2, 3, 7, 9]
9.) reverse() 
Reverses the list.

>>> arr.reverse()
>>> print arr
[9, 7, 3, 2, 1]
"""

L = []
n = input()

for i in xrange(n):
	k = []
	k = raw_input().split()

	if k[0] == 'insert':
		L.insert(int(k[1]),int(k[2]))
	elif k[0] == 'print':
		print L
	elif k[0] == 'remove':
		L.remove(int(k[1]))
	elif k[0] == 'append':
		L.append(int(k[1]))
	elif k[0] == 'sort':
		L.sort()
	elif k[0] == 'pop':
		L.pop()
	elif k[0] == 'reverse':
		L.reverse()
	else:
		print 'not a command'