migrate to python3

Let's move to python3, it's 2020 and the conversion seemed
actually rather trivial (famous last words).

Change-Id: Ib1604b36c32630e1360e06567cbd5f63a78df547

contrib/libusrp.spec.in

@@ -32,7 +32,7 @@ BuildRequires:  sdcc
 %if 0%{?suse_version} < 1320
 BuildRequires:  python
 %else
-BuildRequires:  python2
+BuildRequires:  python3
 %endif
 BuildRequires:  pkgconfig(libusb-1.0)
 %if 0%{?suse_version} > 1325

debian/control

@@ -9,7 +9,7 @@ Build-Depends: debhelper (>=9),
                doxygen,
                libtool,
                pkg-config,
-               python,
+               python3,
                sdcc,
                libusb-1.0-0-dev,
                libboost-all-dev

firmware/include/generate_regs.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python3
 
 import os, os.path
 import re
@@ -8,7 +8,7 @@ import sys
 # set srcdir to the directory that contains Makefile.am
 try:
     srcdir = os.environ['srcdir']
-except KeyError, e:
+except KeyError as e:
     srcdir = "."
 srcdir = srcdir + '/'
 

firmware/src/common/build_eeprom.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python3
 #
 # Copyright 2004,2006 Free Software Foundation, Inc.
 # 
@@ -24,6 +24,7 @@ import re
 import sys
 import os, os.path
 from optparse import OptionParser
+from functools import reduce
 
 # USB Vendor and Product ID's
 
@@ -33,7 +34,7 @@ PID = 0x0002                            # Universal Software Radio Peripheral
 
 def hex_to_bytes (s):
     if len (s) & 0x1:
-        raise ValueError, "Length must be even"
+        raise ValueError("Length must be even")
     r = []
     for i in range (0, len(s), 2):
         r.append (int (s[i:i+2], 16))
@@ -59,17 +60,17 @@ class ihx_file (object):
         for line in file:
             line = line.strip().upper ()
             if not self.pat.match (line):
-                raise ValueError, "Invalid hex record format"
+                raise ValueError("Invalid hex record format")
             bytes = hex_to_bytes (line[1:])
             sum = reduce (lambda x, y: x + y, bytes, 0) % 256
             if sum != 0:
-                raise ValueError, "Bad hex checksum"
+                raise ValueError("Bad hex checksum")
             lenx = bytes[0]
             addr = (bytes[1] << 8) + bytes[2]
             type = bytes[3]
             data = bytes[4:-1]
             if lenx != len (data):
-                raise ValueError, "Invalid hex record (bad length)"
+                raise ValueError("Invalid hex record (bad length)")
             if type != 0:
                 break;
             r.append (ihx_rec (addr, type, data))
@@ -153,7 +154,7 @@ def build_shell_script (out, ihx_filename, rev, prefix):
     i2c_addr = 0x50
     rom_addr = 0x00
 
-    hex_image = map (lambda x : "%02x" % (x,), image)
+    hex_image = ["%02x" % (x,) for x in image]
 
     while (len (hex_image) > 0):
         l = min (len (hex_image), 16)

firmware/src/common/edit-gpif

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # -*- Python -*-
 #
 # Copyright 2003 Free Software Foundation, Inc.

firmware/src/usrp2/edit-gpif

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # -*- Python -*-
 #
 # Copyright 2003 Free Software Foundation, Inc.