Python: Remove duplicate words from a given string

Last update on June 12 2025 12:43:02 (UTC/GMT +8 hours)

Remove duplicate words in string.

Write a Python program to remove duplicate words from a given string.

Sample Solution:

Python Code:

# Define a function to return a string with unique words
def unique_list(text_str):
    # Split the input string into a list of words
    l = text_str.split()
    
    # Initialize an empty list to store unique words
    temp = []
    
    # Iterate through each word in the list
    for x in l:
        # Check if the word is not already in the temporary list
        if x not in temp:
            # If true, add the word to the temporary list
            temp.append(x)
    
    # Join the unique words into a string and return the result
    return ' '.join(temp)

# Initialize a string
text_str = "Python Exercises Practice Solution Exercises"

# Print the original string
print("Original String:")
print(text_str)

# Print a newline for better formatting
print("\nAfter removing duplicate words from the said string:")

# Call the function to remove duplicate words and print the result
print(unique_list(text_str)) 

Sample Output:

Original String:
Python Exercises Practice Solution Exercises

After removing duplicate words from the said string:
Python Exercises Practice Solution

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to remove duplicate words from a sentence while preserving the order of their first occurrence.
• Write a Python program to split a string into words, remove duplicates using a set, and then reconstruct the string preserving original order.
• Write a Python program to implement duplicate word removal by iterating through words and using a helper list to track seen words.
• Write a Python program to use collections.OrderedDict to filter out duplicate words and output the resulting string.

Go to:

• Python Data Type String Exercises Home ↩
• Python Exercises Home ↩

Previous: Write a Python program to remove unwanted characters from a given string.
Next: Write a Python program to convert a given heterogeneous list of scalars into a string.

Python Code Editor: