Programming Articles - Page 1337 of 3366

When it is required to sum the number of digits in a list, a simple loop and the ‘str’ method can be used.A list can be used to store heterogeneous values (i.e data of any data type like integer, floating point, strings, and so on).The ‘str’ method converts the given value into a string data type.Below is a demonstration for the same −Example Live Demomy_list = [11, 23, 41, 62, 89, 0, 10] print("The list is : ") print(my_list) my_result = [] for elem in my_list:    sum_val = 0    for digit in str(elem):       sum_val += int(digit) ... Read More

When it is required to remove empty tuples from a list of tuples, a simple loop can be used.A list can be used to store heterogeneous values (i.e data of any data type like integer, floating point, strings, and so on).A list of tuple basically contains tuples enclosed in a list.Below is a demonstration for the same −Example Live Demodef remove_empty(my_tuple):    my_tuple = [t for t in my_tuple if t]    return my_tuple my_tuple = [(), (), (''), (" " , " "), (45, 67, 35, 66, 74, 89, 100) , 'jane'] print("The tuple is : ") print(my_tuple) print("The method ... Read More

When it is required to sort the values of the first list with the help of the second list, the ‘sorted’ method and the ‘zip’ methods are used.A list can be used to store heterogeneous values (i.e data of any data type like integer, floating point, strings, and so on).The ‘sorted’ method is used to sort the elements of a list.The zip method takes iterables, aggregates them into a tuple, and returns it as the result.Below is a demonstration for the same −Example Live Demodef list_sort(my_list_1, my_list_2):    zipped_list_pairs = zip(my_list_2, my_list_1)    my_result = [x for _, x in sorted(zipped_list_pairs)] ... Read More

When it is required to edit the objects inside a tuple, simple indexing can be used.A list can be used to store heterogeneous values (i.e data of any data type like integer, floating point, strings, and so on).Below is a demonstration for the same −Example Live Demomy_tuple = (45, 67, [35, 66, 74], 89, 100) print("The tuple is : ") print(my_tuple) my_tuple[2][1] = 63 print("The tuple after changes is : ") print(my_tuple)OutputThe tuple is : (45, 67, [35, 66, 74], 89, 100) The tuple after changes is : (45, 67, [35, 63, 74], 89, 100)ExplanationA tuple of list is defined, and ... Read More

When it is required to display the letters common to two strings, the ‘set’ method can be used.Python comes with a datatype known as ‘set’. This ‘set’ contains elements that are unique only.The set is useful in performing operations such as intersection, difference, union and symmetric difference.Below is a demonstration for the same −Example Live Demostring_1 = 'hey' string_2 = 'jane' print("The first string is :") print(string_1) print("The second string is :") print(string_2) my_result = list(set(string_1)|set(string_2)) print("The letters are : ") for i in my_result:    print(i)OutputThe first string is : hey The second string is : jane The letters are ... Read More

When it is required to find longest common substring using dynamic programming with bottom-up approach, a method can be defined, that computes the solution to smaller problems. These smaller problem results don’t need to be computed again and again. Instead, they can just be accessed when required. This would lead to developing a solution to the bigger problem in hand.Below is a demonstration for the same −Example Live Demodef compute_lcw(string_1, string_2):    val = [[-1]*(len(string_2) + 1) for _ in range(len(string_1) + 1)]    for i in range(len(string_1) + 1):       val[i][len(string_2)] = 0    for j in range(len(string_2)): ... Read More

When it is required to assign a specific value to the non max-min elements in a tuple, the ‘max’ method, the ‘min’ method, the ‘tuple’ method and a loop can be used.The ‘max’ method returns the maximum value among all of the elements in an iterable. The ‘min’ method returns the minimum value among all of the elements in an iterable.The ‘tuple’ method converts a given value/iterable into a tuple type.Below is a demonstration for the same −Example Live Demomy_tuple = (25, 56, 78, 91, 23, 11, 0, 99, 32, 10) print("The tuple is : ") print(my_tuple) K = 5 print("K ... Read More

When it is required to sort a list of tuples based on the second item, the lambda function and ‘sorted’ method can be used.A list can be used to store heterogeneous values (i.e data of any data type like integer, floating point, strings, and so on). A list of tuple basically contains tuples enclosed in a list.Anonymous function is a function which is defined without a name.In general, functions in Python are defined using ‘def’ keyword, but anonymous function is defined with the help of ‘lambda’ keyword. It takes a single expression, but can take any number of arguments. It ... Read More

When it is required to print an identity matrix, nested loops can be used.Below is a demonstration for the same −Example Live Demon = 4 print("The value of n has been initialized to " +str(n)) for i in range(0, n):    for j in range(0, n):       if(i==j):          print("1", sep=" ", end=" ")       else:          print("0", sep=" ", end=" ")    print()OutputThe value of n has been initialized to 4 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1ExplanationThe value of ‘n’ ... Read More

When it is required to search for an element in a doubly linked list, a ‘Node’ class needs to be created. In this class, there are three attributes, the data that is present in the node, the access to the next node of the linked list, and the access to the previous node of the linked list.Another class needs to be created that would have an initialization function, and the head of the node would be initialized to ‘None’ inside this.Multiple methods are defined by the user to add node to the linked list, to display the nodes it and ... Read More