Combine similar characters in Python using Dictionary Get() Method

Last Updated : 14 Apr, 2022

Let us see how to combine similar characters in a list.

Example :

Input : [‘g’, ‘e’, ‘e’, ‘k’, ‘s’, ‘f’, ‘o’, ‘r’, ‘g’, ‘e’, ‘e’, ‘k’, ‘s’]

Output : [‘gg’, ‘eeee’, ‘kk’, ‘ss’, ‘f’, ‘o’, ‘r’]

We will be using the get() method of the dictionary class.

dictionary.get()

The get() method returns the value of the item with the specified key.

Syntax : dictionary.get(key name, value)

Parameters :

keyname : The key name of the dictionary item.

value : (Optional) If the specified key does not exist, then a value is returned.

Returns : Value of the item with the specified key

Algorithm :

Declare the list.
Declare a dictionary.
Iterate over the list, using the get() method, if a new key is found, then the value 0 is assigned to it and 1 is added making the final value 1. Else if the key is repeated, then 1 is added to the previously calculated value. So this way, now each key has a value assigned to it, and frequency of all characters is recorded.
Separate all the keys and the values and store them in 2 different lists.
Use the zip() function store the product of keys and their respective values in the result list.
Display the result.

Example 1 :

python3

   # declaring the list of characters
mylist = ['g', 'e', 'e', 'k', 's', 'f', 
          'o', 'r', 'g', 'e', 'e', 'k', 's'] 
 
# declaring the dictionary
dictionary = {} 
 
# counting the frequency of the keys
for key in mylist: 
    dictionary[key] = dictionary.get(key, 0) + 1
 
# storing the of keys and values
k = list(dictionary.keys())
v = list(dictionary.values())
 
# declaring the result list
result = []
 
# storing the product of keys and 
# their respective values in result
for i, j in zip(k, v):
    result.append(i * j)
     
# displaying the result
print(result)
 
  

Output :

['gg', 'eeee', 'kk', 'ss', 'f', 'o', 'r']

Example 2 :

python3

   # declaring the list of characters
mylist = ['p', 'y', 't', 'h', 'o', 'n', 't', 
          'u', 't', 'o', 'r', 'i', 'a', 'l']
 
# declaring the dictionary
dictionary = {} 
 
# counting the frequency of the keys
for key in mylist: 
    dictionary[key] = dictionary.get(key, 0) + 1
 
# storing the of keys and values
k = list(dictionary.keys())
v = list(dictionary.values())
 
# declaring the result list
result = []
 
# storing the product of keys and 
# their respective values in result
for i, j in zip(k, v):
    result.append(i * j)
     
# displaying the result
print(result)
 
  

Output :

['a', 'h', 'i', 'l', 'n', 'oo', 'p', 'r', 'ttt', 'u', 'y']

Python - Convert Dictionary Object into String

gauravbabbar25

Improve

Article Tags :

Practice Tags :

Given the words, the task is to extract different words from a set of characters using the defined dictionary. Approach: Python in its language defines an inbuilt module enchant which handles certain operations related to words. In the approach mentioned, following methods are used. check() : It che

3 min read

Python Dictionary to find mirror characters in a string

Given a string and a number N, we need to mirror the characters from the N-th position up to the length of the string in alphabetical order. In mirror operation, we change â€˜aâ€™ to â€˜zâ€™, â€˜bâ€™ to â€˜yâ€™, and so on. Examples: Input : N = 3 paradox Output : paizwlc We mirror characters from position 3 to end.

2 min read

Replacing Characters in a String Using Dictionary in Python

In Python, we can replace characters in a string dynamically based on a dictionary. Each key in the dictionary represents the character to be replaced, and its value specifies the replacement. For example, given the string "hello world" and a dictionary {'h': 'H', 'o': 'O'}, the output would be "Hel

2 min read

Convert a List of Characters into a String - Python

Our task is to convert a list of characters into a single string. For example, if the input is ['H', 'e', 'l', 'l', 'o'], the output should be "Hello". Using join() We can convert a list of characters into a string using join() method, this method concatenates the list elements (which should be stri

2 min read

Python - Convert Dictionary Object into String

In Python, there are situations where we need to convert a dictionary into a string format. For example, given the dictionary {'a' : 1, 'b' : 2} the objective is to convert it into a string like "{'a' : 1, 'b' : 2}". Let's discuss different methods to achieve this: Using strThe simplest way to conve

2 min read

How to print Odia Characters and Numbers using Python?

Odia(ଓଡ଼ିଆ) is an Indo-Aryan language spoken in the Indian state of Odisha. The Odia Script is developed from the Kalinga alphabet, one of the many descendants of the Brahmi script of ancient India. The earliest known example of Odia language, in the Kalinga script, dates from

2 min read

Print anagrams together in Python using List and Dictionary

An anagram is a word or phrase formed by rearranging the letters of another word or phrase, using all the original letters exactly once. The task of grouping anagrams together in Python can be efficiently solved using lists and dictionaries. The key idea is to process each word by sorting its charac

2 min read

Map function and Dictionary in Python to sum ASCII values

We are given a sentence in the English language(which can also contain digits), and we need to compute and print the sum of ASCII values of the characters of each word in that sentence. Examples: Input : GeeksforGeeks, a computer science portal for geeksOutput : Sentence representation as sum of ASC

2 min read

Python - Converting list string to dictionary

Converting a list string to a dictionary in Python involves mapping elements from the list to key-value pairs. A common approach is pairing consecutive elements, where one element becomes the key and the next becomes the value. This results in a dictionary where each pair is represented as a key-val

3 min read

Find all duplicate characters in string in Python

In this article, we will explore various methods to find all duplicate characters in string. The simplest approach is by using a loop with dictionary. Using Loop with DictionaryWe can use a for loop to find duplicate characters efficiently. First we count the occurrences of each character by iterati

3 min read

Combine similar characters in Python using Dictionary Get() Method

dictionary.get()

python3

python3

Similar Reads