Remove python-2-isms and set sharpbang to use 3

prog/usb-flasher/usb-flash.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python3
 '''
   Copyright (C) 2016 Bastille Networks
 
@@ -16,6 +16,7 @@
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 '''
 
+from __future__ import print_function
 
 import usb, time, sys, array, logging
 
@@ -25,32 +26,32 @@
 # Check pyusb dependency
 try:
   from usb import core as _usb_core
-except ImportError, ex:
-  print '''
+except ImportError as ex:
+  print('''
 ------------------------------------------
 | PyUSB was not found or is out of date. |
 ------------------------------------------
 
 Please update PyUSB using pip:
 
 sudo pip install -U -I pip && sudo pip install -U -I pyusb
-'''
+''')
   sys.exit(1)
 
 # USB timeout sufficiently long for operating in a VM
 usb_timeout = 2500
 
 # Verify that we received a command line argument
 if len(sys.argv) < 2:
-  print 'Usage: ./usb-flash.py path-to-firmware.bin'
+  print('Usage: ./usb-flash.py path-to-firmware.bin')
   quit()
 
 # Read in the firmware
 with open(sys.argv[1], 'rb') as f:
   data = f.read()
 
 # Zero pad the data to a multiple of 512 bytes
-data += '\000' * (512 - len(data) % 512)
+data += b'\000' * (512 - len(data) % 512)
 
 # Find an attached device running CrazyRadio or RFStorm firmware
 logging.info("Looking for a compatible device that can jump to the Nordic bootloader")
@@ -93,7 +94,7 @@
 
 # Write the data, one page at a time
 logging.info("Writing image to flash")
-page_count = len(data) / 512
+page_count = len(data) // 512
 for page in range(page_count):
 
   # Tell the bootloader that we are going to write a page