def delete_system_info(key, default=None):
 obj = meta.Session.query(SystemInfo).filter_by(key=key).first()
 if obj:
  meta.Session.delete(obj)
  meta.Session.commit()

def delete_system_info ( key , default = None ) : obj = meta . Session . query ( SystemInfo ) . filter_by ( key = key ) . first ( ) if obj : meta . Session . delete ( obj ) meta . Session . commit ( )
delete data from system_info table .