# create an empty list
list1= []
print(list1)
#list with mixed data types
#with int string and float, tuple, list and set value.
list2 = [1, "Hello", 3.4, (1,2,4), [1,3,4], {1,2,3}]
print(list2)
#creating list with list constructor
tl= list(("apple", "banana", "cat"))
print(tl) #['apple', 'banana', 'cat']
#Acess list items
plang = ["Python", "Swift", "C++","Kotlin","C","C#"]
print(plang[0])# result:- Python
# access item at index 2
print(plang[2]) # C++
# access item at index 5
print(plang[5]) # C#
# access item at negative index -1
print(plang[-1]) # C#
# access item at negative index -2
print(plang[-2]) # C#
#access nested list element
list1=[5,3.2,'ram',6,8,9,[8,5,6]]
print(list1[6][1]) #5
#List slicing in Python
my_list = ['I','T','C','I',' ','H','A','R','D','O','I']
#items from index 2 to index 4
print(my_list[0:4]) #result- ['I','T','C','I']
# items from index 5 to end
print(my_list[5:]) #result:- ['H','A','R','D','O','I']
# result items beginning to end
print(my_list)
print(my_list[:])
print(my_list[:11])
print(my_list[-11:])
# Add element using append method in list
numbers= [21, 34, 54, 12]
print("Before Append:", numbers)
# after using append method
numbers.append(32) #it takes exactly one argument in one time
print("After Append:", numbers)
#with extend method you can add a list element in another list (join two lists)
#using extend method here you can also add any iterable object (tuples, sets, dictionaries etc.).
num1 = [2, 3, 5]
print("List1:", num1)
num2 = [4, 6, 8]
print("List2:", num2)
num2.extend(num1)
print("List after extend:", num2)
#or
fr_list = ["apple", "banana", "cherry"]
other_list = list(fr_list)
print(other_list)
#or using + concatenate operator
list1 = ["a", "b", "c"]
list2 = [1, 2, 3]
list3 = list1 + list2
print(list3)
#Creating nested list
list1 = [1, 2, 3, 4, 5]
print(list1)
list2 = [12, 13, 23]
print(list2)
list3 = [10, 20, 30]
print(list3)
NestedList = [list1, list2, list3, list4, list5]
print("The list of lists or Nested list is:")
print(NestedList)
#copy list items in another empty list
g= ["apple", "baby", "ambuj"]
a = g.copy()
print(a)
#or you can copy
g= ["anand", "vartika", "chaya"]
a = list(g)
print(a)
#insert an item in list without removing existing element
thislist = ["apple", "banana", "cow"]
thislist.insert(2, "water")
print(thislist) # here result will be ["apple", "banana", "water","cow"]
# changing list item:(it's mutable so we can change list items.
color= ['pink', 'red', 'gray']
# changing the third item to 'C'
color[2] = 'green'
print(color) # ['pink', 'red', 'green']
# changing the list items acc to range(change range)
th = ["apple", "blue", "cool", "orange", "kiwi", "mango"]
print(th) #["apple", "blue", "cool", "orange", "kiwi", "mango"]
th[1:3] = ["black", "bag"]
print(th) #["apple", "black", "bag", "orange", "kiwi", "mango"]
#pop method for using last element from list or remove item acor to index value
t = ["apple", "banana", "cherry"]
t.pop()
print(t) #["apple", "banana"]
t1=["ajay", "vijay", "chetan"]
t1.pop(2)
print(t1)
#remove method for remove any specific element
prog = ['Python', 'Swift', 'C++', 'C', 'Java', 'Ruby', 'php']
prog.remove('Java')
print(prog)
#remove list items using del keyword
prog = ['Python', 'Swift', 'C++', 'C', 'Java', 'Ruby', 'php']
# deleting the second item
del prog[1]
print(prog) # ['Python', 'C++', 'C', 'Java', 'Ruby', 'php']
# deleting the last item
del prog[-1]
print(prog) # ['Python', 'C++', 'C', 'Java', 'Ruby']
# delete first two items
del prog[0 : 2] # ['C', 'Java', 'Ruby']
print(prog)
# del all list in one time with del and clear
prog = ['Python', 'Swift', 'C++', 'C', 'Java', 'Ruby', 'php']
del prog
prog1= ['Python', 'Swift', 'C++', 'C']
prog1.clear()
print(prog1) #return empty list
#creating a list with for loop
for i in range(6):
print(i)
#print all items from list by using loop method
z=['a','b','c','d']
for i in (z):
print(i)
#append item from one list to another list using loop
fruits = ["apple", "banana", "cherry", "kiwi", "mango"]
newlist = []
for x in fruits:
if "a" in x:
newlist.append(x)
print(newlist) #the result will be ["apple", "banana", "mango"] bcz a is found in all items
#sort the list items
fruit = ["orange", "mango", "kiwi", "pineapple", "banana"]
fruit.sort()
print(fruit) #['banana', 'kiwi', 'mango', 'orange', 'pineapple']
num= [100, 50, 65, 82, 23]
num.sort()
print(num)
#sort list in descending order
num= [100, 50, 65, 82, 23]
num.sort(reverse = True)
print(num)
#count the items from list
fruits = ["apple", "banana", "cherry","cherry"]
x = fruits.count("cherry")
print(x) #result:- 2
#find index value from list items
fruits = ['apple', 'banana', 'cherry']
x = fruits.index("banana")
print(x) #index value is 1
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