Python – Group Similar Start and End character words
Sometimes, while working with Python data, we can have problem in which we need to group all the words on basis of front and end characters. This kind of application is common in domains in which we work with data like web development. Lets discuss certain ways in which this task can be performed.
Method #1 : Using defaultdict() + loop
The combination of above functions can be used to perform this task. In this, we check for front and last element using string slice notations and store in dict. with first and last character as key.
# Python3 code to demonstrate working of # Group Similar Start and End character words# Using defaultdict() + loopfrom collections import defaultdict def end_check(word): sub1 = word.strip()[0] sub2 = word.strip()[-1] temp = sub1 + sub2 return temp def front_check(word): sub = word.strip()[1:-1] return sub # initializing stringtest_str = 'geeksforgeeks is indias best and bright for geeks' # printing original stringprint("The original string is : " + str(test_str)) # Group Similar Start and End character words# Using defaultdict() + looptest_list = test_str.split()res = defaultdict(set)for ele in test_list: res[end_check(ele)].add(front_check(ele)) # printing result print("The grouped dictionary is : " + str(dict(res))) |
Output :
The original string is : geeksforgeeks is indias best and bright for geeks
The grouped dictionary is : {‘fr’: {‘o’}, ‘bt’: {‘righ’, ‘es’}, ‘ad’: {‘n’}, ‘gs’: {‘eeksforgeek’, ‘eek’}, ‘is’: {”, ‘ndia’}}
.png)