NOTE: The pytags utility began life as a utility called pytagfromfilename. You may see references to that name in older documents.
pytags is a simple command-line utility that makes it easy to directly modify tags. Usage is simple:
pytags --set artist=foo title=bar myfile.flac
pytags also supports an interesting feature that allows files to be tagged based on their names.
Assume that we had many flac files in the current directory named like "artst - album - tracknumber - title.flac". The following command would tag all of those files by parsing the desired tag values directly from the file names:
pytags --pattern '%a - %l - %n - %t.%e' *.flac
See the relevant Documentation for more information.