python messy try except block

Messy.py

def td_apply_cmd(credential):	
	global err_count
	ms = 0
	try:		
		(ip, username, password, cmd_file, ms_str) = re.findall(r"(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}):(.+):(.+):(.+):(.+)", credential)[0]
		ms = int(ms_str)
	except IndexError:
		try:
			(ip, username, password, cmd_file) = re.findall(r"(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}):(.+):(.+):(.+)", credential)[0]
			cmd_file = cmd_file.rstrip(":")
			ms = 500
		except IndexError: #from re.findall()
			print "Bad credential file"
			print "\t expect newline or bad credential pattern: \'%s\'" % credential
			err_count = err_count+1
	except ValueError: # from int()
			print "Bad credential file type ValueError"
			print "\t Bad credential pattern: \'%s\'" % credential
			err_count = err_count+1

	tn_connect = telnet_connect(ip, username, password)
	if tn_connect == None:
		err_count = err_count+1
		return

	print "\n* Sending command(s) to device: %s\n" % (ip)	
	apply_cmd(tn_connect, cmd_file, fname_out=("%s.log"%ip), waitoutput_ms=int(ms))