How Can I Speed Up Regex Word Replacements in Python 3?

Speeding Up Regex Replacements in Python 3

The question is about speeding up the replacement of words in a large number of sentences using regular expressions. The task requires replacing words only when they are complete words, not as part of larger strings.

One potential solution is to employ the str.replace method, which is generally considered to be more efficient than re.sub. However, for this approach to work, we need to ensure that replacements are performed only at word boundaries. A simple way to achieve this is by adding word boundary characters, such as b, to the replacement pattern.

As an alternative, exploring ways to optimize the re.sub method itself is certainly worth considering. One approach is to skip replacements when the length of the word to be replaced exceeds the length of the sentence in question. While this strategy doesn't offer significant optimization, it's still worth testing.

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