Fix multiple Python 3 compatibility issues

Changes in Python 3 that made the code choke:

  o basestring is merged into str
  o print() needs parentesis
  o Class inheritance syntax changed
  o Abstract baseclass (ABCMeta) syntax changed
  o map.iteritems() is replaced by map.items()
  o Inconsistent use of tabs and spaces are no longer tolerated

Signed-off-by: Jan Lindemann <jan@janware.com>

scripts/process-text-files.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python2
+#!/usr/bin/python3
 # -*- coding: utf-8 -*-
 
 from __future__ import print_function
@@ -125,7 +125,7 @@ class Cmd(jwutils.Cmd):
         with open(path) as infile, open(tmp, 'w') as outfile:
             data = infile.read()
             #slog(NOTICE, "-- opened", path)
-            for src, target in replacements.iteritems():
+            for src, target in replacements.items():
                 #slog(NOTICE, "replacing", src, "to", target)
                 odata = data
                 #data = data.replace(src, target)
@@ -148,7 +148,7 @@ class Cmd(jwutils.Cmd):
         if func is None:
             func = self._replace_pattern
         for line in iter(string.splitlines()):
-            for src, target in replacements.iteritems():
+            for src, target in replacements.items():
                 line = func(line, src, target)
                 r = r + line
         return r
@@ -303,7 +303,7 @@ class CmdReplaceCppSymbols(Cmd):
                     continue
                 if not trunc.lower() in self.file_truncs:
                     continue
-                for patt, repl in self.replacements.iteritems():
+                for patt, repl in self.replacements.items():
                     if patt == trunc:
                         path     = dir + '/' + name
                         new_path = dir + '/' + repl + ext

scripts/trim-src.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python2
+#!/usr/bin/python3
 # -*- coding: utf-8 -*-
 
 from abc import abstractmethod

test/trim-src/Makefile

@@ -18,5 +18,5 @@ clean.test:
 clean: clean.test
 
 help:
-	python2 $(EXE) -h
-	python2 $(EXE) beautify -h
+	python3 $(EXE) -h
+	python3 $(EXE) beautify -h

tools/python/jwutils/Cmd.py

@@ -1,13 +1,12 @@
-from abc import ABCMeta, abstractmethod
-
+import abc
 import argparse
-import Object
 
-class Cmd(Object.Object): # export
+# compatible with Python 2 *and* 3
+ABC = abc.ABCMeta('ABC', (object,), {'__slots__': ()})
 
-    __metaclass__=ABCMeta
+class Cmd(ABC): # export
 
-    @abstractmethod
+    @abc.abstractmethod
     def run(self, args):
         pass
 

tools/python/jwutils/Cmds.py

@@ -1,13 +1,13 @@
 import os
 import sys
 import argparse
-import Object
-import jwutils.log
+import jwutils
 import importlib
 import inspect
 import re
+import pickle
 
-class Cmds(Object.Object): # export
+class Cmds: # export
 
     def __init__(self, description = '', filter = '^Cmd.*', modules=None):
         self.__description = description

tools/python/jwutils/Object.py

@@ -1,3 +1,4 @@
+from __future__ import print_function
 import jwutils.log
 
 class Object(object): # export
@@ -14,7 +15,7 @@ class Object(object): # export
             for count, thing in enumerate(args):
                 msg += ' ' + str(*thing)
             if len(msg):
-                print msg[1:]
+                print(msg[1:])
 
     def debug(self, *args):
         jwutils.log.slog(jwutils.log.DEBUG, args)

tools/python/jwutils/algo/ShuntingYard.py

@@ -2,6 +2,12 @@ from collections import namedtuple
 import re
 import shlex
 
+# --- python 2 / 3 compatibility stuff
+try:
+    basestring
+except NameError:
+    basestring = str
+
 L, R = 'Left Right'.split()
 ARG, KEYW, QUOTED, LPAREN, RPAREN = 'arg kw quoted ( )'.split()
 
@@ -49,7 +55,7 @@ class ShuntingYard(object): # export
             for count, thing in enumerate(args):
                 msg += ' ' + str(thing)
             if len(msg):
-                print msg[1:]
+                print(msg[1:])
 
     def token_string(self):
         r = ""

tools/python/jwutils/log.py

@@ -3,7 +3,13 @@ import syslog
 import sys
 import inspect
 from os.path import basename
-import misc
+from . import misc
+
+# --- python 2 / 3 compatibility stuff
+try:
+    basestring
+except NameError:
+    basestring = str
 
 EMERG = syslog.LOG_EMERG
 ALERT = syslog.LOG_ALERT