Python – Case Insensitive string counter
Given a List of Strings, find frequency of strings case insensitive.
Input : test_list = [“Gfg”, “Best”, “GFG”, “is”, “IS”, “BEST”]
Output : {‘gfg’: 2, ‘best’: 2, ‘is’: 2}
Explanation : All occur twice.Input : test_list = [“Gfg”, “gfg”, “GFG”]
Output : {‘gfg’: 3}
Explanation : Only “gfg” 3 occurrences.
Method : Using defaultdict() + lower()
In this, we perform lower() to all the strings, before mapping in defaultdict. This ensures case insensitivity while mapping and cumulating frequency.
Python3
# Python3 code to demonstrate working of # Strings Frequency (Case Insensitive) # Using defaultdict() + lower() from collections import defaultdict # initializing list test_list = ["Gfg", "Best", "best", "gfg", "GFG", "is", "IS", "BEST"] # printing original list print("The original list is : " + str(test_list)) res = defaultdict(int) for ele in test_list: # lowercasing to cater for Case Insensitivity res[ele.lower()] += 1 # printing result print("Strings Frequency : " + str(dict(res))) |
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Output
The original list is : ['Gfg', 'Best', 'best', 'gfg', 'GFG', 'is', 'IS', 'BEST']
Strings Frequency : {'gfg': 3, 'best': 3, 'is': 2}
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