old_contents: #!/usr/bin/env python3
  import binascii
  import os
  import sys
  from collections import defaultdict
  
  import cereal.messaging as messaging
  from common.realtime import sec_since_boot
  
  
  def can_printer(bus=0, max_msg=None, addr="127.0.0.1"):
    logcan = messaging.sub_sock('can', addr=addr)
  
    start = sec_since_boot()
    lp = sec_since_boot()
    msgs = defaultdict(list)
    canbus = int(os.getenv("CAN", bus))
    while 1:
      can_recv = messaging.drain_sock(logcan, wait_for_one=True)
      for x in can_recv:
        for y in x.can:
          if y.src == canbus:
            msgs[y.address].append(y.dat)
  
      if sec_since_boot() - lp > 0.1:
        dd = chr(27) + "[2J"
        dd += "%5.2f\n" % (sec_since_boot() - start)
        for k, v in sorted(zip(msgs.keys(), map(lambda x: binascii.hexlify(x[-1]), msgs.values()))):
          if max_msg is None or k < max_msg:
            dd += "%s(%6d) %s\n" % ("%04X(%4d)" % (k, k), len(msgs[k]), v.decode('ascii'))
        print(dd)
        lp = sec_since_boot()
  
  if __name__ == "__main__":
    if len(sys.argv) > 3:
      can_printer(int(sys.argv[1]), int(sys.argv[2]), sys.argv[3])
    elif len(sys.argv) > 2:
      can_printer(int(sys.argv[1]), int(sys.argv[2]))
    elif len(sys.argv) > 1:
      can_printer(int(sys.argv[1]))
    else:
      can_printer()
  
new_contents: #!/usr/bin/env python3
  import argparse
  import binascii
  from collections import defaultdict
  
  import cereal.messaging as messaging
  from common.realtime import sec_since_boot
  
  
  def can_printer(bus, max_msg, addr):
    logcan = messaging.sub_sock('can', addr=addr)
  
    start = sec_since_boot()
    lp = sec_since_boot()
    msgs = defaultdict(list)
    while 1:
      can_recv = messaging.drain_sock(logcan, wait_for_one=True)
      for x in can_recv:
        for y in x.can:
          if y.src == bus:
            msgs[y.address].append(y.dat)
  
      if sec_since_boot() - lp > 0.1:
        dd = chr(27) + "[2J"
        dd += "%5.2f\n" % (sec_since_boot() - start)
        for k, v in sorted(zip(msgs.keys(), map(lambda x: binascii.hexlify(x[-1]), msgs.values()))):
          if max_msg is None or k < max_msg:
            dd += "%s(%6d) %s\n" % ("%04X(%4d)" % (k, k), len(msgs[k]), v.decode('ascii'))
        print(dd)
        lp = sec_since_boot()
  
  if __name__ == "__main__":
    parser = argparse.ArgumentParser(description="PlotJuggler plugin for reading openpilot logs",
                                     formatter_class=argparse.ArgumentDefaultsHelpFormatter)
  
    parser.add_argument("--bus", help="CAN bus to print out", default=0)
    parser.add_argument("--max_msg", help="max addr ")
    parser.add_argument("--addr", default="127.0.0.1")
  
    args = parser.parse_args()
    can_printer(args.bus, args.max_msg, args.addr)
  
subject: add arg parser to can printer