Find repeated words

Write a Python program to find accidentally repeated words like “the the”.

['is', 'the', 'module']
This is a test of the regex module.

Approach

1. A back-reference \1 matches the same text again.

Solution

import re text = "This is is a test of the the regex module module."print(re.findall(r"\b(\w+)\s+\1\b", text))print(re.sub(r"\b(\w+)\s+\1\b", r"\1", text))

['is', 'the', 'module']
This is a test of the regex module.

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