Programming Articles - Page 863 of 2501

When it is required to replace first ‘K’ elements by ‘N’, a simple iteration is used.ExampleBelow is a demonstration of the same −my_list = [13, 34, 26, 58, 14, 32, 16, 89] print("The list is :") print(my_list) K = 2 print("The value of K is :") print(K) N = 99 print("The value of N is :") print(N) for index in range(K): my_list[index] = N print("The result is :") print(my_list)OutputThe list is : [13, 34, 26, 58, 14, 32, 16, 89] The value of K is : 2 The value of N ... Read More

When it is required to insert character in each duplicate string after every ‘K’ elements, a method is defined that uses ‘append’ method, concatenation operator and list slicing.ExampleBelow is a demonstration of the same −def insert_char_after_key_elem(my_string, my_key, my_char): my_result = [] for index in range(0, len(my_string), my_key): my_result.append(my_string[:index] + my_char + my_string[index:]) return str(my_result) my_string = 'PythonToCode' print("The string is :") print(my_string) K = 2 print("The value of K is ") print(K) add_char = ";" print("The result is ... Read More

When it is required to display average of digit greater than K, a simple iteration is used.Below is a demonstration of the same −Examplemy_list = [11, 17, 25, 16, 23, 18] print ("The list is :") print(my_list) K = 15 print("The value of K is ") print(K) my_count = 0 for index in my_list :    if index > K :       my_count = my_count + 1 print ("The result is :") print(my_count)OutputThe list is : [11, 17, 25, 16, 23, 18] The value of K is 15 The result is : 5ExplanationA list is defined and displayed ... Read More

When it is required to get next N elements from K value, a simple iteration is used.Below is a demonstration of the same −Examplemy_list = [31, 24, 46, 18, 34, 52, 26, 29] print("The list is :") print(my_list) K = 2 print("The value of K is :") print(K) N = 3 print("The value of N is :") print(N) for index in range(K):    my_list[index] = N print("The result is :") print(my_list)OutputThe list is : [31, 24, 46, 18, 34, 52, 26, 29] The value of K is : 2 The value of N is : 3 The result is : ... Read More

When it is required to remove tuples with difference greater than K, use the abs() method.Below is a demonstration of the same −Examplemy_tuple = [(41, 18), (21,57), (39, 22), (23, 42), (22, 10)] print("The tuple is :") print(my_tuple) K = 20 my_result = [element for element in my_tuple if abs(element[0] - element[1])

When it is required to remove dictionary from a list of dictionaries if a particular value is not present, a simple iteration and the ‘del’ operator is used.ExampleBelow is a demonstration of the same −my_list = [{"id" : 1, "data" : "Python"}, {"id" : 2, "data" : "Code"}, {"id" : 3, "data" : "Learn"}] print("The list is :") print(my_list) for index in range(len(my_list)): if my_list[index]['id'] == 2: del my_list[index] break print("The result is :") print(my_list)OutputThe list ... Read More

When it is required to extract strings which have successive alphabets in alphabetical order, a simple iteration, and the ‘ord’ method for Unicode representation is used.ExampleBelow is a demonstration of the same −my_list = ["python", 'is', 'cool', 'hi', 'Will', 'How'] print("The list is :") print(my_list) my_result = [] for element in my_list: for index in range(len(element) - 1): if ord(element[index]) == ord(element[index + 1]) - 1: my_result.append(element) break print("The result ... Read More

When it is required to test for desired string lengths, a simple iteration, and the ‘len’ method is used.ExampleBelow is a demonstration of the same −my_list = ["python", 'is', 'fun', 'to', 'learn', 'Will', 'how'] print("The list is :") print(my_list) length_list = [6, 2, 3, 2, 5, 4, 3] my_result = True for index in range(len(my_list)):    if len(my_list[index]) != length_list[index]:       my_result = False break print("The result is :") if(my_result == True):    print("All the strings are of required lengths") else:    print("All the strings are not of required lengths")OutputThe list is : ... Read More

When it is required to sort a list of strings based on the number of unique characters, a method is defined that uses a ‘set’ operator, the ‘list’ method and the ‘len’ method.ExampleBelow is a demonstration of the same −def my_sort_func(my_elem): return len(list(set(my_elem))) my_list = ['python', "Will", "Hi", "how", 'fun', 'learn', 'code'] print("The list is : ") print(my_list) my_list.sort(key = my_sort_func) print("The result is :") print(my_list)OutputThe list is : ['python', 'Will', 'Hi', 'how', 'fun', 'learn', 'code'] The result is : ['Hi', 'Will', 'how', 'fun', 'code', 'learn', 'python']ExplanationA method named ‘my_sort_func’ is defined, that takes ... Read More

When it is required to extract words starting with vowel from a list, a simple iteration, a flag value and the ‘startswith’ method are used.Below is a demonstration of the same −Example:my_list = ["abc", "phy", "and", "okay", "educate", "learn", "code"] print("The list is :") print(my_list) my_result = [] my_vowel = "aeiou" print("The vowels are ") print(my_vowel) for index in my_list: my_flag = False for element in my_vowel: if index.startswith(element): my_flag = True ... Read More