Counter() function in Python:
Python Counter is a container that keeps track of the count of each element in the container. The counter class is a subclass of the dictionary class.
The counter class is a subclass of the dictionary class. You can count the key-value pairs in an object, also known as a hash table object, using the Python Counter tool.
split() Method:
To extract the words from the string, we used the split() method with space as the separator, which returns a list of the words in the string.
key() method :
The key() method will be used to retrieve the keys of a dictionary. It returns all of the keys in a dictionary.
Given a string/sentence and the task is to remove all the duplicate words from a given sentence.
- Python Program to Find All Non Repeated Characters in a String
- Python Program to Remove the last Word from the String/Sentence
- Python Program to Accept a Hyphen Separated Sequence of Words as Input and Print the Words in a Hyphen-Separated Sequence after Sorting them Alphabetically
Examples:
Example1:
Input:
Given String = 'good morning btechgeeks good morning hello all all'
Output:
The given sentence after the removal of all duplicate words : good morning btechgeeks hello all
Example2:
Input:
Given String = ' health is is wealth so protect it so so'
Output:
The given sentence after the removal of all duplicate words : health is wealth so protect it
Program To Remove all Duplicates Words from a Sentence
Below are the ways to remove all the duplicate words from a given sentence.
Method #1: Using Counter() Function (Static Input)
Approach:
- Import the Counter() function from the collections module using the import keyword.
- Give the string as static input and store it in a variable.
- Split the given string into a list of words using the split() function and store it in another variable.
- Apply Counter() function on the above-obtained list of words and store it in another variable.
- Join all the keys of the above-obtained dictionary using the join() function and store it in another variable.
- Print the given sentence after the removal of all duplicate words.
- The Exit of the program.
Below is the implementation:
# Import the Counter() function from the collections module using the import keyword.
from collections import Counter
# Give the string as static input and store it in a variable.
gvn_str = 'good morning btechgeeks good morning hello all all'
# Split the given string into a list of words using the split() function and
# store it in another variable.
splt_str = gvn_str.split(" ")
# Apply Counter() function on the above-obtained list of words and store it
# in another variable.
dictinry = Counter(splt_str)
# Join all the keys of the above-obtained dictionary using the join() function
# and store it in another variable.
reslt = " ".join(dictinry.keys())
# Print the given sentence after the removal of all duplicate words.
print("The given sentence after the removal of all duplicate words :")
print(reslt)
Output:
The given sentence after the removal of all duplicate words : good morning btechgeeks hello all
Method #2: Using Counter() Function (User Input)
Approach:
- Import the Counter() function from the collections module using the import keyword.
- Give the string as user input using the input() function and store it in a variable.
- Split the given string into a list of words using the split() function and store it in another variable.
- Apply Counter() function on the above-obtained list of words and store it in another variable.
- Join all the keys of the above-obtained dictionary using the join() function and store it in another variable.
- Print the given sentence after the removal of all duplicate words.
- The Exit of the program.
Below is the implementation:
# Import the Counter() function from the collections module using the import keyword.
from collections import Counter
# Give the string as user input using the input() function and store it in a variable.
gvn_str = input("Enter some random string : ")
# Split the given string into a list of words using the split() function and
# store it in another variable.
splt_str = gvn_str.split(" ")
# Apply Counter() function on the above-obtained list of words and store it
# in another variable.
dictinry = Counter(splt_str)
# Join all the keys of the above-obtained dictionary using the join() function
# and store it in another variable.
reslt = " ".join(dictinry.keys())
# Print the given sentence after the removal of all duplicate words.
print("The given sentence after the removal of all duplicate words :")
print(reslt)
Output:
Enter some random string : health is is wealth so protect it so so The given sentence after the removal of all duplicate words : health is wealth so protect it