bsrn.io.retrieval.months_from_ftp_filenames# bsrn.io.retrieval.months_from_ftp_filenames(filenames)[source]# Extract a unique set of (year, month) tuples from a list of BSRN filenames. Parameters: filenames (list of str) – List of filenames from BSRN FTP. Returns: months – Sorted list of (year, month) tuples. Return type: list of tuple