Python Articles - Page 493 of 1048

When it is required to count average digits in a list, a simple iteration, the ‘str’ method and the ‘/’ operator is used.Below is a demonstration of the same −Example Live Demomy_list = [324, 5345, 243, 746, 432, 463, 946787] print("The list is :") print(my_list) sum_digits = 0 for ele in my_list:    sum_digits += len(str(ele))     my_result = sum_digits / len(my_list) print("The result is :") print(my_result)OutputThe list is : [324, 5345, 243, 746, 432, 463, 946787] The result is : 3.5714285714285716ExplanationA list is defined and displayed on the console.A variable is initialized to 0.The list ... Read More

When it is required to test string in character list and vice-versa, a simple ‘in’ operator and ‘join’ method are used.Below is a demonstration of the same −Example Live Demomy_string = 'python' print("The string is :") print(my_string) my_key = ['p', 'y', 't', 'h', 'o', 'n', 't', 'e', 's', 't'] print("The key is ") print(my_key) joined_list = ''.join(my_key) my_result = my_string in joined_list print("The result is :") if(my_result == True):    print("The string is present in the character list") else:    print("The string is not present in the character list")OutputThe string is : python The key is ['p', ... Read More

When it is required to test all even elements in the list for the given range, a simple iteration and the modulus operator is used.Below is a demonstration of the same −Example Live Demomy_list = [32, 12, 42, 61, 58, 60, 19, 16] print("The list is :") print(my_list) i, j = 2, 7 my_result = True for index in range(i, j + 1):    if my_list[index] % 2 :       my_result = False       break print("The result is :") if(my_result == True):    print("All The elements are in the given range") ... Read More

When it is required to sort matrix by maximum string length, a method is defined that takes a list as parameter and uses list comprehension and the ‘max’ and ‘len’ methods to determine the result.Below is a demonstration of the same −Example Live Demodef max_length(row):    return max([len(element) for element in row]) my_matrix = [['pyt', 'fun'], ['python'], ['py', 'cool'], ['py', 'ea']] print("The matrix is :") print(my_matrix ) my_matrix .sort(key=max_length) print("The result is :") print(my_matrix )OutputThe matrix is : [['pyt', 'fun'], ['python'], ['py', 'cool'], ['py', 'ea']] The result is : [['py', 'ea'], ['pyt', 'fun'], ['py', 'cool'], ['python']]ExplanationA method ... Read More

When it is required to extract row with any Boolean True, a list comprehension is used along with the ‘any’ operator.Below is a demonstration of the same −Example Live Demomy_tuple = [[False, True], [False, False], [True, False, True], [False]] print("The tuple is :") print(my_tuple) my_result = [row for row in my_tuple if any(element for element in row)] print("The result is ") print(my_result)OutputThe tuple is : [[False, True], [False, False], [True, False, True], [False]] The result is [[False, True], [True, False, True]]ExplanationA list of list is defined and displayed on the console.A list comprehension is used to check if ... Read More

When it is required to sort tuples by total digits, a method is defined that converts every element in the list to a string, and gets the length of each of these strings, and adds them up. This is displayed as result of the method.Below is a demonstration of the same −Example Live Demodef count_tuple_digits(row):    return sum([len(str(element)) for element in row]) my_tuple = [(32, 14, 65, 723), (13, 26), (12345, ), (137, 234, 314)] print("The tuple is :") print(my_tuple) my_tuple.sort(key = count_tuple_digits) print("The result is :") print(my_tuple)OutputThe tuple is : [(32, 14, 65, 723), (13, 26), ... Read More

When it is required to display incremental slice concatenation in string list, a simple iteration and list slicing is used.Below is a demonstration of the same −Example Live Demomy_list = ['pyt', 'is', 'all', 'fun'] print("The list is :") print(my_list) my_result = '' for index in range(len(my_list)):    my_result += my_list[index][:index + 1] print("The result is :") print(my_result)OutputThe list is : ['pyt', 'is', 'all', 'fun'] The result is : pisallfunExplanationA list is defined and displayed on the console.An empty string is created.The list is iterated over, and the element is concatenated with the consecutive element.This result is assigned ... Read More

When it is required to filter rows with required elements, a list comprehension and the ‘all’ operator is used.Below is a demonstration of the same −Example Live Demomy_list = [[261, 49, 61], [27, 49, 3, 261], [261, 49, 85], [1, 1, 9]] print("The list is :") print(my_list) check_list = [49, 61, 261, 85] my_result = [index for index in my_list if all(element in check_list for element in index)] print("The result is :") print(my_result)OutputThe list is : [[261, 49, 61], [27, 49, 3, 261], [261, 49, 85], [1, 1, 9]] The result is : [[261, 49, 61], [261, ... Read More

When it is required to sort by a particular digit count in elements, a method is defined that takes list element as parameter and uses the ‘count’ and ‘str’ methods to determine the results.Below is a demonstration of the same −Example Live Demodef sort_count_digits(elements):    return str(elements).count(str(my_key)) my_list = [4522, 2452, 1233, 2465] print("The list is :") print(my_list) my_key = 2 print("The value of key is ") print(my_key) my_list.sort(key = sort_count_digits) print("The result is :") print(my_list)OutputThe list is : [4522, 2452, 1233, 2465] The value of key is 2 The result is : [1233, 2465, ... Read More

When it is required to extract elements with equal frequency as value, a list comprehension, the ‘count’ method and the ‘set’ operator are used.Below is a demonstration of the same −Example Live Demomy_list = [4, 1, 8, 6, 2, 4, 1, 3, 2, 4, 4] print("The list is :") print(my_list) my_result = list(set([element for element in my_list if my_list.count(element) == element])) print("The result is :") print(my_result)OutputThe list is : [4, 1, 8, 6, 2, 4, 1, 3, 2, 4, 4] The result is : [2, 4]ExplanationA list is defined and displayed on the console.A list comprehension is used ... Read More