About Regex Named Groups
When you replace a complex regular expression with references to matched groups, consider using named groups. That works as self-explaining documentation of your regex patterns.
import re
original_path = re.sub(
r"/__CACHE__/(?P<original>.+?)_xs\.(?P<ext>\w+)$",
r"/\g<original>.\g<ext>",
version_path,
)
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