the findAll() method with the href filter already retrieves tags that include href attributes matching the regular expression ^(/wiki/). This makes the explicit check if 'href' in link.attrs: redundant in this specific case.

However, the extra check might have been included as a safeguard to handle cases where:

A tag unexpectedly doesn't have an href attribute (though unlikely here). To future-proof the code if the findAll() condition or use case changes. Conclusion: Yes, the line if 'href' in link.attrs: can be safely removed here. It duplicates validation already handled by the findAll() filter. The retained validation adds no practical value in this context.