LIST OPERATIONS:
================

REVERSING OF THE LIST:
======================

reverse():
=========
an inbuilt method which we can use to reverse the list

Syntax:
	list-object.reverse()

# Reversing of the list

ld = eval(input("Enter a list:"))

print("The List Before the reverse operation is:")
print(ld)

ld.reverse()

print("The List After the reverse operation is:")
print(ld)

=================================================

Sorting of the list data:
=========================

Sorting ==> arranging of list data in Ascending order (Low to High)
	or
	arranging of list data in Descending Order (High to Low)

ex: [1,0,-1,11,-10,111]
sorting ==> [-10,-1,0,1,11,111] ==> Ascending Order/Increasing Order Arrangement
		Forward Sorting

sorting ==> [111,11,1,0,-1,-10] ==> Descending Order/Decreasing Order Arrangement
		Reverse Sorting

Note:
====
By default, forward sorting can be performed.

Forward Sorting:
===============
sort():
	an inbuilt method which we can use to arrange the elements in ascending order.
	Syntax:
		list-object.sort()
		or
		list-object.sort(reverse = False)

# Forward Sorting

ld = [1,0,-1,11,-10,111]

print("The List Without Sorting is = ")
print(ld)

ld.sort()

print("The List With Forward Sorting is = ")
print(ld)

==========

Reverse Sorting:
================
sort():
	we can also use sort() for the reverse sorting.
Syntax:
	list-object.sort(reverse = True)

ld = [1,0,-1,11,-10,111]

print("The List Without Sorting is = ")
print(ld)

ld.sort(reverse = True)

print("The List With Reverse Sorting is = ")
print(ld)

==============================================

LIST ALIASING:
==============
Defining the alternative name to the original list is called as "List Aliasing".
List aliasing can be defined with '='.

ex: a = [1,2,3,4,5]
b = a

==> when the list with two names, both the names acquired the same address.

id(a) = 123456
id(b) = 123456

==> The modification/change at one object will reflect on another object.

a[1] = 97

print(a) ==> [1,97,3,4,5]
print(b) ==> [1,97,3,4,5]

==========================================

# List Aliasing

a = eval(input("Enter a list:"))

# b = eval(input("Enter a list:"))
b = a

print(a);print(b)
print(id(a));print(id(b))

a[1] = 111

print(a);print(b)

b[3] = 121

print(a);print(b)

=================
SBI ==> Loaning Feature()

ICICI ==> Loaning Feature()
ICICI = SBI

when the customer, ICICI ==> Personal Loan with 1000000
Record of ICICI will maintain at SBI

SBI ==> 25000000
SBI Record ===> ICICI

================================

List Cloning:
=============
The change of one list object, need not reflect on another list object is called as "list cloning".

Two ways for List Cloning:
	1) Using Slice Operator
	2) Using copy()

1) Using Slice Operator:
========================

# List Cloning using slicing

x = [1,3,5,7,9]

y = x[:]

print(x);print(y)

print(id(x));print(id(y))

x[1] = 100

print(x);print(y)

y[2] = 97

print(x);print(y)

============================

2) using copy():
===============
copy():
	an inbuilt method, which we can use to copy the data from one list to another list
Syntax:
	new-list = old-list.copy()

# List Cloning with copy()

x = eval(input("Enter a list:"))

y = x.copy()

print(id(x));print(id(y))
print(x);print(y)

x[0] = 1221

print(x);print(y)

y[2] = 9779

print(x);print(y)

=======================================

# WAP TO DISPLAY UNIQUE VOWELS PRESENT IN THE GIVEN WORD.

"""
vowels ==> a,e,i,o,u
word = "Object Oriented"
op = unique vowels = 3
"""

vowels = ['A','a','E','e','I','i','O','o','U','u']
word = input("Enter the word:") # "Object Oriented"

result = list() # ['O','e','i']

for l in word:
    if l in vowels:
        if l not in result:
            result.append(l)


print("A list with Unique Vowels = ",result)
print("The Number of Unique Vowels are = ",len(result))