Python program to find uncommon words from two Strings
Given two sentences as strings A and B. The task is to return a list of all uncommon words. A word is uncommon if it appears exactly once in any one of the sentences, and does not appear in the other sentence.
Note: A sentence is a string of space separated words. Each word consists only of lowercase letters.
Examples:
Input : A = "Geeks for Geeks"
B = "Learning from Geeks for Geeks"
Output : ['Learning', 'from']
Input : A = "apple banana mango"
B = "banana fruits mango"
Output : ['apple', 'fruits']
Approach: Every uncommon word occurs exactly once in any one of the strings. So, we make a hash to count the number of occurrences of every word, then return list of words that occurs exactly once.
Below is the implementation of above approach:
# Python3 program to find list of uncommon words # Function to return all uncommon words def UncommonWords(A, B): # count will contain all the word counts count = {} # insert words of string A to hash for word in A.split(): count[word] = count.get(word, 0) + 1 # insert words of string B to hash for word in B.split(): count[word] = count.get(word, 0) + 1 # return required list of words return [word for word in count if count[word] == 1] # Driver Code A = "Geeks for Geeks"B = "Learning from Geeks for Geeks" # Print required answer print(UncommonWords(A, B)) |
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Output:
['Learning', 'from']
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