code: def process_file(filename, timeshift):
      '''process one file'''
      print("Processing %s" % filename)
      mlog = mavutil.mavlink_connection(filename, notimestamps=args.notimestamps, zero_time_base=args.zero_time_base, dialect=args.dialect)
      vars = {}
  
      while True:
          msg = mlog.recv_match(args.condition)
          if msg is None: break
          try:
              tdays = matplotlib.dates.date2num(datetime.datetime.fromtimestamp(msg._timestamp+timeshift))
          except ValueError:
              # this can happen if the log is corrupt
              # ValueError: year is out of range
              break
          add_data(tdays, msg, mlog.messages, mlog.flightmodef process_file(filename, timeshift):
      '''process one file'''
      print("Processing %s" % filename)
      mlog = mavutil.mavlink_connection(filename, notimestamps=args.notimestamps, zero_time_base=args.zero_time_base, dialect=args.dialect)
      vars = {}
  
      while True:
          msg = mlog.recv_match(args.condition)
          if msg is None: break
          try:
              tdays = matplotlib.dates.date2num(datetime.datetime.fromtimestamp(msg._timestamp+timeshift))
          except ValueError:
              # this can happen if the log is corrupt
              # ValueError: year is out of range
              break
          add_data(tdays, msg, mlog.messages, mlog.flightmode)
docs: process one file