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send_fileandsend_from_directorywere renamed in Flask 2.0. The removal of the old names was deferred for an extra release. They have now been issuing a deprecation warning for over a year.download_namereplacesattachment_filename,max_agereplacescache_timeout,etagreplacesadd_etags, andpathreplacesfilename.RequestContext.gwas a property returningAppContext.g. Sincegis not part of the request context, the property is removed.