We are pleased to announce the release of Biopython 1.48. Some new functionality has been added, a few bugs have been fixed, the documentation has been updated, plus several obsolete modules have been deprecated (or explicitly labelled as obsolete). The following additional file formats are now supported in Bio.SeqIO and Bio.AlignIO: reading and writing “tab” format (simple tab separated) writing “nexus” files reading “pir” files (NBRF/PIR)