When it is required to perform dual tuple alternate summation, a simple iteration and the modulus operator are used.Below is a demonstration of the same −Example Live Demomy_list = [(24, 11), (45, 66), (53, 52), (77, 51), (31, 10)] print("The list is :") print(my_list) my_result = 0 for index in range(len(my_list)):    if index % 2 == 0:       my_result += my_list[index][0]    else:       my_result += my_list[index][1] print("The result is :") print(my_result)OutputThe list is : [(24, 11), (45, 66), (53, 52), (77, 51), (31, 10)] The result is : 225ExplanationA list of ... Read More

When it is required to extract rear K digits from numbers, a simple list comprehension, the modulo operator and the ‘**’ operator are used.Below is a demonstration of the same −Example Live Demomy_list = [51645, 24567, 36743, 89452, 2122] print("The list is :") print(my_list) K = 3 print("The value of K is ") print(K) my_result = [element % (10 ** K) for element in my_list] print("The result is :") print(my_result)OutputThe list is : [51645, 24567, 36743, 89452, 2122] The value of K is 3 The result is : [645, 567, 743, 452, 122]ExplanationA list is defined and ... Read More

When it is required to combine list with other list elements, a simple iteration and ‘append’ method is used.Below is a demonstration of the same −Example Live Demomy_list_1 = [12, 14, 25, 36, 15] print("The first list is :") print(my_list_1) my_list_2 = [23, 15, 47, 12, 25] print("The second list is :") print(my_list_2) for element in my_list_2 :    my_list_1.append(element) print ("The result is :") print(my_list_1)OutputThe first list is : [12, 14, 25, 36, 15] The second list is : [23, 15, 47, 12, 25] The result is : [12, 14, 25, 36, 15, 23, 15, ... Read More

When it is required to sort matrix based upon sum of rows, a method is defined that uses ‘sum’ method to determine the result.Below is a demonstration of the same −Example Live Demodef sort_sum(row):    return sum(row) my_list = [[34, 51], [32, 15, 67], [12, 41], [54, 36, 22]] print("The list is :") print(my_list) my_list.sort(key = sort_sum) print("The result is :") print(my_list)OutputThe list is : [[34, 51], [32, 15, 67], [12, 41], [54, 36, 22]] The result is : [[12, 41], [34, 51], [54, 36, 22], [32, 15, 67]]ExplanationA method named ‘sort_sum’ is defined that takes a ... Read More

When it is required to sort by maximum digit in element, a method is defined that uses ‘str’ and ‘max’ method to determine the result.Below is a demonstration of the same −Example Live Demodef max_digits(element):    return max(str(element)) my_list = [224, 192, 145, 18, 3721] print("The list is :") print(my_list) my_list.sort(key = max_digits) print("The result is :") print(my_list)OutputThe list is : [224, 192, 145, 18, 3721] The result is : [224, 145, 3721, 18, 192]ExplanationA method named ‘max_digits’ is defined that takes element as a parameter, and converts it into a string, and then gets the maximum ... Read More

When it is required to calculate the percentage of positive elements of the list, a list comprehension and the ‘len’ method are used.Below is a demonstration of the same −Example Live Demomy_list = [14, 62, -22, 13, -87, 0, -21, 81, 29, 31] print("The list is :") print(my_list) my_result = (len([element for element in my_list if element > 0]) / len(my_list)) * 100 print("The result is :") print(my_result)OutputThe list is : [14, 62, -22, 13, -87, 0, -21, 81, 29, 31] The result is : 0ExplanationA list is defined and displayed on the console.A list comprehension is used ... Read More

When it is required to filter rows with range elements, a list comprehension and the ‘all’ operator is used to determine the output.Below is a demonstration of the same −Example Live Demomy_list = [[3, 2, 4, 5, 10], [32, 12, 4, 51, 10], [12, 53, 11], [2, 3, 31, 5, 8, 7]] print("The list is :") print(my_list) i, j = 2, 5 my_result = [index for index in my_list if all(element in index for element in range(i, j + 1))] print("The result is :") print(my_result)OutputThe list is : [[3, 2, 4, 5, 10], [32, 12, 4, 51, ... Read More

When it is required to sort strings by punctuation count, a method is defined that takes a string as a parameter and uses list comprehension and ‘in’ operator to determine the result.Below is a demonstration of the same −Example Live Demofrom string import punctuation def get_punctuation_count(my_str):    return len([element for element in my_str if element in punctuation]) my_list = ["python@%^", "is", "fun!", "to@#r", "@#$learn!"] print("The list is :") print(my_list) my_list.sort(key = get_punctuation_count) print("The result is :") print(my_list)OutputThe list is : ['python@%^', 'is', 'fun!', 'to@#r', '@#$learn!'] The result is : ['is', 'fun!', 'to@#r', 'python@%^', '@#$learn!']ExplanationThe required packages ... Read More

When it is required to sort matrix by row median, a method is defined that uses the ‘median’ method to determine the result.Below is a demonstration of the same −Example Live Demofrom statistics import median def median_row(row):    return median(row) my_list = [[43, 14, 27], [13, 27, 24], [32, 56, 18], [34, 62, 55]] print("The list is :") print(my_list) my_list.sort(key = median_row) print("The result is :") print(my_list)OutputThe list is : [[43, 14, 27], [13, 27, 24], [32, 56, 18], [34, 62, 55]] The result is : [[13, 27, 24], [43, 14, 27], [32, 56, 18], [34, ... Read More

When it is required to display all the combinations of a dictionary list, a simple list comprehension and the ‘zip’ method along with the ‘product’ method are used.Below is a demonstration of the same −Example Live Demofrom itertools import product my_list_1 = ["python", "is", "fun"] my_list_2 = [24, 15] print("The first list is :") print(my_list_1) print("The second list is :") print(my_list_2) temp = product(my_list_2, repeat = len(my_list_1)) my_result = [{key : value for (key , value) in zip(my_list_1, element)} for element in temp] print("The result is :") print(my_result)OutputThe first list is : ['python', 'is', 'fun'] The ... Read More