Python Articles - Page 607 of 1048

When it is required to create a dictionary where keys have multiple inputs, an empty dictionary can be created, and the value for a specific key can be specified.Below is the demonstration of the same −Example Live Demomy_dict = {} a, b, c = 15, 26, 38 my_dict[a, b, c] = a + b - c a, b, c = 5, 4, 11 my_dict[a, b, c] = a + b - c print("The dictionary is :") print(my_dict)OutputThe dictionary is : {(15, 26, 38): 3, (5, 4, 11): -2}ExplanationThe required packages are imported.An empty dictionary is defined.The values for ... Read More

When it is required to sort the key and values in a dictionary, the ‘sorted’ method can be used.Below is the demonstration of the same −Example Live Demomy_dict = {'Hi': [1, 6, 3],    'there': [2, 9, 6],    'Mark': [16, 7]} print("The dictionary is : ") print(my_dict) my_result = dict() for key in sorted(my_dict):    my_result[key] = sorted(my_dict[key]) print("The sorted dictionary is : " ) print(my_result)OutputThe dictionary is : {'Hi': [1, 6, 3], 'there': [2, 9, 6], 'Mark': [16, 7]} The sorted dictionary is : {'Hi': [1, 3, 6], 'Mark': [7, 16], 'there': [2, 6, 9]}ExplanationA dictionary ... Read More

When it is required to sort the dictionaries in Python using a key or a value, a dictionary can be defined, and key value pairs can be inserted into it. A ‘for’ loop can be used to iterate through the key value pair, and sort it using ‘sort’ method. This method can be called.Below is the demonstration of the same −Exampledef my_dict(): my_key_value_pair ={} my_key_value_pair[2] = 56 my_key_value_pair[1] = 2 my_key_value_pair[5] = 12 my_key_value_pair[4] = 24 my_key_value_pair[6] = 18 my_key_value_pair[3] = 323 print ("The keys and values after sorting in alphabetical order based on the key are ... Read More

When it is required to check the order of the character in the string, the ‘OrderedDict’ method can be used.Below is the demonstration of the same −Example Live Demofrom collections import OrderedDict def check_order(my_input, my_pattern):    my_dict = OrderedDict.fromkeys(my_input)    pattern_length = 0    for key, value in my_dict.items():       if (key == my_pattern[pattern_length]):          pattern_length = pattern_length + 1       if (pattern_length == (len(my_pattern))):          return 'The order of pattern is correct'    return 'The order of pattern is incorrect' my_input = 'Hi Mark' input_pattern = 'Ma' ... Read More

When it is required to insert the elements at the beginning of an ordered dictionary, the ‘update’ method can be used.Below is the demonstration of the same −Example Live Demofrom collections import OrderedDict my_ordered_dict = OrderedDict([('Will', '1'), ('James', '2'), ('Rob', '4')]) print("The dictionary is :") print(my_ordered_dict) my_ordered_dict.update({'Mark':'7'}) my_ordered_dict.move_to_end('Mark', last = False) print("The resultant dictionary is : ") print(my_ordered_dict)OutputThe dictionary is : OrderedDict([('Will', '1'), ('James', '2'), ('Rob', '4')]) The resultant dictionary is : OrderedDict([('Mark', '7'), ('Will', '1'), ('James', '2'), ('Rob', '4')])ExplanationThe required packages are imported.An ordered dictionary is created using OrderedDict’.It is displayed on the console.The ‘update’ method is used ... Read More

When it is required to sort the list of dictionaries based on values, the lambda function can be used.Below is the demonstration of the same −Example Live Demofrom operator import itemgetter my_list = [{ "name" : "Will", "age" : 56}, { "name" : "Rob", "age" : 20 }, { "name" : "Mark" , "age" : 34 }, { "name" : "John" , "age" : 24 }] print("The list sorted ... Read More

When it is required to sort the list of dictionary based on values, the itemgetter attribute can be used.Below is the demonstration of the same −Example Live Demofrom operator import itemgetter my_list = [{ "name" : "Will", "age" : 56}, { "name" : "Rob", "age" : 20 }, { "name" : "Mark" , "age" : 34 }, { "name" : "John" , "age" : 24 }] print("The list sorted ... Read More

When it is required to extract unique values from a dictionary, a dictionary is created, and the ‘sorted’ method and dictionary comprehension is used.Below is a demonstration for the same −Example Live Demomy_dict = {'hi' : [5, 3, 8, 0],    'there' : [22, 51, 63, 77],    'how' : [7, 0, 22],    'are' : [12, 11, 45],    'you' : [56, 31, 89, 90]} print("The dictionary is : ") print(my_dict) my_result = list(sorted({elem for val in my_dict.values() for elem in val})) print("The unique values are : ") print(my_result)OutputThe dictionary is : {'hi': [5, 3, 8, 0], ... Read More

When it is required to count the number of lower case characters in a string, the ‘islower’ method and a simple ‘for’ loop can be used.Below is the demonstration of the same −Example Live Demomy_string = "Hi there how are you" print("The string is ") print(my_string) my_counter=0 for i in my_string:    if(i.islower()):       my_counter=my_counter+1 print("The number of lowercase characters in the string are :") print(my_counter)OutputThe string is Hi there how are you The number of lowercase characters in the string are : 15ExplanationA string is defined and is displayed on the console.A counter value is initialized to ... Read More

When it is required to take two strings and display the larger string without using any built-in function, the counter can be used to get the length of the strings, and ‘if’ condition can be used to compare their lengths.Below is the demonstration of the same −Example Live Demostring_1= "Hi there" string_2= "Hi how are ya" print("The first string is :") print(string_1) print("The second string is :") print(string_2) count_1 = 0 count_2 = 0 for i in string_1:    count_1=count_1+1 for j in string_2:    count_2=count_2+1 if(count_1