AAIC_Lists

emptyList = [] lst = ['one', 'two', 'three', 'four'] # list of strings lst2 = [1, 2, 3, 4] #list of integers lst3 = [[1, 2], [3, 4]] # list of lists lst4 = [1, 'ramu', 24, 1.24] # list of different datatypes print(lst4)

[1, 'ramu', 24, 1.24]

lst = ['one', 'two', 'three', 'four'] #find length of a list print(len(lst))

lst = ['one', 'two', 'three', 'four'] lst.append('five') # append will add the item at the end print(lst)

['one', 'two', 'three', 'four', 'five']

#syntax: lst.insert(x, y) lst = ['one', 'two', 'four'] lst.insert(2, "three") # will add element y at location x print(lst)

['one', 'two', 'three', 'four']

#syntax: lst.remove(x) lst = ['one', 'two', 'three', 'four', 'two'] lst.remove('two') #it will remove first occurence of 'two' in a given list print(lst)

['one', 'three', 'four', 'two']

lst = ['one', 'two', 'three', 'four'] lst2 = ['five', 'six'] #append lst.append(lst2) print(lst)

['one', 'two', 'three', 'four', ['five', 'six']]

lst = ['one', 'two', 'three', 'four'] lst2 = ['five', 'six'] #extend will join the list with list1 lst.extend(lst2) print(lst)

['one', 'two', 'three', 'four', 'five', 'six']

#del to remove item based on index position lst = ['one', 'two', 'three', 'four', 'five'] del lst[1] print(lst) #or we can use pop() method a = lst.pop(1) print(a) print(lst)

['one', 'three', 'four', 'five']
three
['one', 'four', 'five']

lst = ['one', 'two', 'three', 'four'] #remove an item from list lst.remove('three') print(lst)

['one', 'two', 'four']

#keyword 'in' is used to test if an item is in a list lst = ['one', 'two', 'three', 'four'] if 'two' in lst: print('AI') #keyword 'not' can combined with 'in' if 'six' not in lst: print('ML')

AI
ML

#reverse is reverses the entire list lst = ['one', 'two', 'three', 'four'] lst.reverse() print(lst)

['four', 'three', 'two', 'one']

#create a list with numbers numbers = [3, 1, 6, 2, 8] sorted_lst = sorted(numbers) print("Sorted list :", sorted_lst) #original list remain unchanged print("Original list: ", numbers)

Sorted list : [1, 2, 3, 6, 8]
Original list:  [3, 1, 6, 2, 8]

#print a list in reverse sorted order print("Reverse sorted list :", sorted(numbers, reverse=True)) #orginal list remain unchanged print("Original list :", numbers)

Reverse sorted list : [8, 6, 3, 2, 1]
Original list : [3, 1, 6, 2, 8]

lst = [1, 20, 5, 5, 4.2] #sort the list and stored in itself lst.sort() # add element 'a' to the list to show an error print("Sorted list: ", lst)

Sorted list:  [1, 4.2, 5, 5, 20]

lst = [1, 20, 'b', 5, 'a'] print(lst.sort()) # sort list with element of different datatypes.

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lst = [1, 2, 3, 4, 5] abc = lst abc.append(6) #print original list print("Original list: ", lst)