fix netqtop python3 compatible (iovisor#3140)

* fix netqtop python3 compatible
* delete import types

tools/netqtop.py

@@ -1,11 +1,11 @@
 #!/usr/bin/python
 
+from __future__ import print_function
 from bcc import BPF
 from ctypes import *
 import argparse
 import os
 from time import sleep,time,localtime,asctime
-import types
 
 # pre defines -------------------------------
 ROOT_PATH = "/sys/class/net"
@@ -28,7 +28,7 @@ def to_str(num):
  elif num > 1000:
  return str(round(num/1024.0, 2)) + 'K'
  else:
- if type(num) == types.FloatType:
+ if isinstance(num, float):
  return str(round(num, 2))
  else:
  return str(num)
@@ -50,9 +50,10 @@ def print_table(table, qnum):
  headers.append("BPS")
  headers.append("PPS")
 
+ print(" ", end="")
  for hd in headers:
- print(hd.center(COL_WIDTH))
- print
+ print( "%-11s" % hd, end="")
+ print()
 
  # ------- calculates --------------
  qids=[]
@@ -97,42 +98,42 @@ def print_table(table, qnum):
  avg = 0
  if data[2] != 0:
  avg = data[1] / data[2]
- print("%5d %11s %10s %10s %10s %10s %10s" % (
+ print(" %-11d%-11s%-11s%-11s%-11s%-11s%-11s" % (
  data[0],
  to_str(avg),
  to_str(data[3]),
  to_str(data[4]),
  to_str(data[5]),
  to_str(data[6]),
  to_str(data[7])
- )),
+ ), end="")
  if args.throughput:
  BPS = data[1] / print_interval
  PPS = data[2] / print_interval
- print("%10s %10s" % (
+ print("%-11s%-11s" % (
  to_str(BPS),
  to_str(PPS)
  ))
  else:
- print
+ print()
 
  # ------- print total --------------
- print(" Total %10s %10s %10s %10s %10s %10s" % (
+ print(" Total  %-11s%-11s%-11s%-11s%-11s%-11s" % (
  to_str(tAVG),
  to_str(tGroup[0]),
  to_str(tGroup[1]),
  to_str(tGroup[2]),
  to_str(tGroup[3]),
  to_str(tGroup[4])
- )),
+ ), end="")
 
  if args.throughput:
- print("%10s %10s" % (
+ print("%-11s%-11s" % (
  to_str(tBPS),
  to_str(tPPS)
  ))
  else:
- print
+ print()
 
 
 def print_result(b):
@@ -152,7 +153,7 @@ def print_result(b):
  if args.throughput:
  print("-"*95)
  else:
- print("-"*76)
+ print("-"*77)
 
 ############## specify network interface #################
 parser = argparse.ArgumentParser(description="")