migration from python2 to python3

10 files changed, 135 insertions, 133 deletions

diff --git a/src/gperf_fold_key_conv.py b/src/gperf_fold_key_conv.py
index c633100..d943c3e 100755
--- a/src/gperf_fold_key_conv.py
+++ b/src/gperf_fold_key_conv.py
@@ -1,7 +1,7 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # gperf_fold_key_conv.py
-# Copyright (c) 2016-2018  K.Kosako
+# Copyright (c) 2016-2023  K.Kosako
 
 import sys
 import re
@@ -52,7 +52,7 @@ def parse_line(s, key_len):
     return s
 
 def parse_file(f, key_len):
-    print "/* This file was converted by gperf_fold_key_conv.py\n      from gperf output file. */"
+    print("/* This file was converted by gperf_fold_key_conv.py\n      from gperf output file. */")
 
     while True:
         line = f.readline()
@@ -60,7 +60,7 @@ def parse_file(f, key_len):
             break
 
         s = parse_line(line, key_len)
-        print s
+        print(s)
 
 
 # main
diff --git a/src/gperf_unfold_key_conv.py b/src/gperf_unfold_key_conv.py
index d999d4e..deda85d 100755
--- a/src/gperf_unfold_key_conv.py
+++ b/src/gperf_unfold_key_conv.py
@@ -1,7 +1,7 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # gperf_unfold_key_conv.py
-# Copyright (c) 2016-2018  K.Kosako
+# Copyright (c) 2016-2023  K.Kosako
 
 import sys
 import re
@@ -44,12 +44,12 @@ def parse_line(s):
     return s
 
 def parse_file(f):
-    print "/* This file was converted by gperf_unfold_key_conv.py\n      from gperf output file. */"
+    print("/* This file was converted by gperf_unfold_key_conv.py\n      from gperf output file. */")
 
     line = f.readline()
     while line:
         s = parse_line(line)
-        print s
+        print(s)
         line = f.readline()
 
 
diff --git a/src/make_unicode_egcb.sh b/src/make_unicode_egcb.sh
index 1d0719a..be60d36 100755
--- a/src/make_unicode_egcb.sh
+++ b/src/make_unicode_egcb.sh
@@ -2,6 +2,6 @@
 
 NAME=unicode_egcb_data
 
-python2 make_unicode_egcb_data.py > ${NAME}.c
+python3 make_unicode_egcb_data.py > ${NAME}.c
 
 exit 0
diff --git a/src/make_unicode_egcb_data.py b/src/make_unicode_egcb_data.py
index 892f5ef..80db3f0 100755
--- a/src/make_unicode_egcb_data.py
+++ b/src/make_unicode_egcb_data.py
@@ -1,7 +1,7 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # make_unicode_egcb_data.py
-# Copyright (c) 2017-2022  K.Kosako
+# Copyright (c) 2017-2023  K.Kosako
 
 import sys
 import re
@@ -29,10 +29,10 @@ def check_version_info(s):
 
 def print_ranges(ranges):
   for (start, end) in ranges:
-    print "0x%06x, 0x%06x" % (start, end)
+    print("0x%06x, 0x%06x" % (start, end))
 
 def print_prop_and_index(prop, i):
-  print "%-35s %3d" % (prop + ',', i)
+  print("%-35s %3d" % (prop + ',', i))
   PropIndex[prop] = i
 
 def dic_find_by_value(dic, v):
@@ -52,7 +52,7 @@ def normalize_ranges(in_ranges, sort=False):
   r = []
   prev = None
   for (start, end) in ranges:
-    if prev >= start - 1:
+    if prev is not None and prev >= start - 1:
       (pstart, pend) = r.pop()
       end = max(pend, end)
       start = pstart
@@ -192,10 +192,11 @@ merge_props(PROPS, props)
 
 PROPS = sorted(PROPS)
 
-print '/* unicode_egcb_data.c: Generated by make_unicode_egcb_data.py. */'
+print('/* unicode_egcb_data.c: Generated by make_unicode_egcb_data.py. */')
+
 COPYRIGHT = '''
 /*-
- * Copyright (c) 2017-2022  K.Kosako
+ * Copyright (c) 2017-2023  K.Kosako
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -221,13 +222,13 @@ COPYRIGHT = '''
  */
 '''.strip()
 
-print COPYRIGHT
-print ''
+print(COPYRIGHT)
+print('')
 if VERSION_INFO[0] < 0:
   raise RuntimeError("Version is not found")
 
-print "#define GRAPHEME_BREAK_PROPERTY_VERSION  %02d%02d%02d" % (VERSION_INFO[0], VERSION_INFO[1], VERSION_INFO[2])
-print ''
+print("#define GRAPHEME_BREAK_PROPERTY_VERSION  %02d%02d%02d" % (VERSION_INFO[0], VERSION_INFO[1], VERSION_INFO[2]))
+print('')
 
 ranges = []
 for prop in PROPS:
@@ -243,16 +244,16 @@ for (start, end, prop) in ranges:
     raise ValueError("{2}:{0} - {1} range overlap prev value {3}".format(start, end, prop, prev))
 
 
-print '/*'
+print('/*')
 for prop in PROPS:
-  print "%s" % prop
-print '*/'
-print ''
+  print("%s" % prop)
+print('*/')
+print('')
 
 num_ranges = len(ranges)
-print "static int EGCB_RANGE_NUM = %d;" % num_ranges
+print("static int EGCB_RANGE_NUM = %d;" % num_ranges)
 
-print 'static EGCB_RANGE_TYPE EGCB_RANGES[] = {'
+print('static EGCB_RANGE_TYPE EGCB_RANGES[] = {')
 for i, (start, end, prop) in enumerate(ranges):
   if i == num_ranges - 1:
     comma = ''
@@ -260,8 +261,8 @@ for i, (start, end, prop) in enumerate(ranges):
     comma = ','
 
   type_name = 'EGCB_' + prop
-  print " {0x%06x, 0x%06x, %s }%s" % (start, end, type_name, comma)
+  print(" {0x%06x, 0x%06x, %s }%s" % (start, end, type_name, comma))
 
-print '};'
+print('};')
 
 sys.exit(0)
diff --git a/src/make_unicode_fold.sh b/src/make_unicode_fold.sh
index 968b339..625b3df 100755
--- a/src/make_unicode_fold.sh
+++ b/src/make_unicode_fold.sh
@@ -9,19 +9,19 @@ TMP3=gperf3.tmp
 
 GPERF_OPT='-n -C -T -c -t -j1 -L ANSI-C '
 
-python2 make_unicode_fold_data.py > unicode_fold_data.c
+python3 make_unicode_fold_data.py > unicode_fold_data.c
 
 ${GPERF} ${GPERF_OPT} -F,-1,0 -N onigenc_unicode_unfold_key unicode_unfold_key.gperf > ${TMP0}
-python2 gperf_unfold_key_conv.py < ${TMP0} > unicode_unfold_key.c
+python3 gperf_unfold_key_conv.py < ${TMP0} > unicode_unfold_key.c
 
 ${GPERF} ${GPERF_OPT} -F,-1 -N onigenc_unicode_fold1_key unicode_fold1_key.gperf > ${TMP1}
-python2 gperf_fold_key_conv.py 1 < ${TMP1} > unicode_fold1_key.c
+python3 gperf_fold_key_conv.py 1 < ${TMP1} > unicode_fold1_key.c
 
 ${GPERF} ${GPERF_OPT} -F,-1 -N onigenc_unicode_fold2_key unicode_fold2_key.gperf > ${TMP2}
-python2 gperf_fold_key_conv.py 2 < ${TMP2} > unicode_fold2_key.c
+python3 gperf_fold_key_conv.py 2 < ${TMP2} > unicode_fold2_key.c
 
 ${GPERF} ${GPERF_OPT} -F,-1 -N onigenc_unicode_fold3_key unicode_fold3_key.gperf > ${TMP3}
-python2 gperf_fold_key_conv.py 3 < ${TMP3} > unicode_fold3_key.c
+python3 gperf_fold_key_conv.py 3 < ${TMP3} > unicode_fold3_key.c
 
 # remove redundant EOLs before EOF
 perl -i -pe 'BEGIN{undef $/}s/\n\n*\z/\n/;' unicode_fold_data.c
diff --git a/src/make_unicode_fold_data.py b/src/make_unicode_fold_data.py
index e04c12a..1600021 100755
--- a/src/make_unicode_fold_data.py
+++ b/src/make_unicode_fold_data.py
@@ -1,7 +1,7 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # make_unicode_fold_data.py
-# Copyright (c) 2016-2022  K.Kosako
+# Copyright (c) 2016-2023  K.Kosako
 
 import sys
 import re
@@ -30,7 +30,7 @@ LOCALE_UNFOLDS  = {}
 
 COPYRIGHT = '''
 /*-
- * Copyright (c) 2017-2022  K.Kosako
+ * Copyright (c) 2017-2023  K.Kosako
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -182,12 +182,12 @@ typedef unsigned long OnigCodePoint;
 
 def divide_by_fold_len(d):
     l = d.items()
-    l1 = filter(lambda (k,e):e.fold_len == 1, l)
-    l2 = filter(lambda (k,e):e.fold_len == 2, l)
-    l3 = filter(lambda (k,e):e.fold_len == 3, l)
-    sl1 = sorted(l1, key=lambda (k,e):k)
-    sl2 = sorted(l2, key=lambda (k,e):k)
-    sl3 = sorted(l3, key=lambda (k,e):k)
+    l1 = filter(lambda x:x[1].fold_len == 1, l)
+    l2 = filter(lambda x:x[1].fold_len == 2, l)
+    l3 = filter(lambda x:x[1].fold_len == 3, l)
+    sl1 = sorted(l1, key=lambda x:x[0])
+    sl2 = sorted(l2, key=lambda x:x[0])
+    sl3 = sorted(l3, key=lambda x:x[0])
     return (sl1, sl2, sl3)
 
 def output_comment(f, s):
@@ -198,7 +198,7 @@ def output_data_n1(f, n, fn, c, out_comment):
         e.index = c
         if out_comment and n > 1 and e.comment is not None:
             output_comment(f, e.comment)
-            print >> f, ''
+            print('', file=f)
 
         f.write(' ')
         f.write("/*%4d*/ " % c)
@@ -226,25 +226,25 @@ def output_data_n1(f, n, fn, c, out_comment):
     return c
 
 def output_data_n(f, name, n, fn, lfn, out_comment):
-    print >> f, "OnigCodePoint %s%d[] = {" % (name, n)
+    print("OnigCodePoint %s%d[] = {" % (name, n), file=f)
     c = 0
     c = output_data_n1(f, n,  fn, c, out_comment)
-    print >> f, "#define FOLDS%d_NORMAL_END_INDEX   %d" % (n, c)
-    print >> f, " /* ----- LOCALE ----- */"
+    print("#define FOLDS%d_NORMAL_END_INDEX   %d" % (n, c), file=f)
+    print(" /* ----- LOCALE ----- */", file=f)
     c = output_data_n1(f, n, lfn, c, out_comment)
-    print >> f, "#define FOLDS%d_END_INDEX   %d" % (n, c)
-    print >> f, "};"
+    print("#define FOLDS%d_END_INDEX   %d" % (n, c), file=f)
+    print("};", file=f)
 
 def output_fold_data(f, name, out_comment):
     f1, f2, f3 = divide_by_fold_len(FOLDS)
     lf1, lf2, lf3 = divide_by_fold_len(LOCALE_FOLDS)
 
     output_data_n(f, name, 1, f1, lf1, out_comment)
-    print >> f, ''
+    print('', file=f)
     output_data_n(f, name, 2, f2, lf2, out_comment)
-    print >> f, ''
+    print('', file=f)
     output_data_n(f, name, 3, f3, lf3, out_comment)
-    print >> f, ''
+    print('', file=f)
 
 def output_macros(f, name):
     print >> f, "#define FOLDS1_FOLD(i)         (%s1 + (i))" % name
@@ -264,18 +264,18 @@ def output_macros(f, name):
     print >> f, "#define FOLDS3_NEXT_INDEX(i)   ((i) + 4 + %s1[(i)+3])" % name
 
 def output_fold_source(f, out_comment):
-    print >> f, "/* This file was generated by make_unicode_fold_data.py. */"
-    print >> f, COPYRIGHT
-    print >> f, "\n"
-    print >> f, '#include "regenc.h"'
-    print >> f, ''
+    print("/* This file was generated by make_unicode_fold_data.py. */", file=f)
+    print(COPYRIGHT, file=f)
+    print("\n", file=f)
+    print('#include "regenc.h"', file=f)
+    print('', file=f)
     if VERSION_INFO[0] < 0:
       raise RuntimeError("Version is not found")
 
-    print "#define UNICODE_CASEFOLD_VERSION  %02d%02d%02d" % (VERSION_INFO[0], VERSION_INFO[1], VERSION_INFO[2])
-    print ''
+    print("#define UNICODE_CASEFOLD_VERSION  %02d%02d%02d" % (VERSION_INFO[0], VERSION_INFO[1], VERSION_INFO[2]))
+    print('')
     #output_macros(f, DataName)
-    print >> f, ''
+    print('', file=f)
     #output_typedef(f)
     output_fold_data(f, DataName, out_comment)
 
@@ -296,12 +296,12 @@ struct ByUnfoldKey {
     f.write(head)
     UNFOLDS.update(LOCALE_UNFOLDS)
     l = UNFOLDS.items()
-    sl = sorted(l, key=lambda (k,e):(e.fold_len, e.index))
+    sl = sorted(l, key=lambda x:(x[1].fold_len, x[1].index))
     for k, e in sl:
         f.write('"%s", /*0x%04x*/ %4d, %d\n' %
                 (form3bytes(k), k, e.index, e.fold_len))
 
-    print >> f, '%%'
+    print('%%', file=f)
 
 def output_gperf_fold_key(f, key_len):
     head = "%{\n/* This gperf source file was generated by make_unicode_fold_data.py */\n\n" + COPYRIGHT + """\
@@ -314,13 +314,13 @@ short int
 """
     f.write(head)
     l = FOLDS.items()
-    l = filter(lambda (k,e):e.fold_len == key_len, l)
-    sl = sorted(l, key=lambda (k,e):e.index)
+    l = filter(lambda x:x[1].fold_len == key_len, l)
+    sl = sorted(l, key=lambda x:x[1].index)
     for k, e in sl:
         skey = ''.join(map(lambda i: form3bytes(i), e.fold))
         f.write('"%s", %4d\n' % (skey, e.index))
 
-    print >> f, '%%'
+    print('%%', file=f)
 
 def output_gperf_source():
    with open(GPERF_UNFOLD_KEY_FILE, 'w') as f:
@@ -334,7 +334,7 @@ def output_gperf_source():
 
 def unfolds_byte_length_check(encode):
     l = UNFOLDS.items()
-    sl = sorted(l, key=lambda (k,e):(e.fold_len, e.index))
+    sl = sorted(l, key=lambda x:(x[1].fold_len, x[1].index))
     for unfold, e in sl:
         key_len = enc_len(unfold, encode)
         fold_len = sum(map(lambda c: enc_len(c, encode), e.fold))
@@ -345,7 +345,7 @@ def unfolds_byte_length_check(encode):
 
 def double_fold_check():
     l = UNFOLDS.items()
-    sl = sorted(l, key=lambda (k,e):(e.fold_len, e.index))
+    sl = sorted(l, key=lambda x:(x[1].fold_len, x[1].index))
     for unfold, e in sl:
         for f in e.fold:
             #print >> sys.stderr, ("check 0x%06x" % f)
@@ -356,9 +356,9 @@ def double_fold_check():
 
 def unfold_is_multi_code_folds_head_check():
     l = UNFOLDS.items()
-    l2 = filter(lambda (k,e):e.fold_len == 2, l)
-    l3 = filter(lambda (k,e):e.fold_len == 3, l)
-    sl = sorted(l, key=lambda (k,e):(e.fold_len, e.index))
+    l2 = filter(lambda x:x[1].fold_len == 2, l)
+    l3 = filter(lambda x:x[1].fold_len == 3, l)
+    sl = sorted(l, key=lambda x:(x[1].fold_len, x[1].index))
     for unfold, _ in sl:
         for k, e in l2:
             if e.fold[0] == unfold:
@@ -454,7 +454,7 @@ def get_all_folds_expansion_max_num():
     one_folds = make_one_folds(l)
     fold2_heads = make_foldn_heads(l, 2, one_folds)
     fold3_heads = make_foldn_heads(l, 3, one_folds)
-    sl = sorted(l, key=lambda (k,e):(e.fold_len, e.index))
+    sl = sorted(l, key=lambda x:(x[1].fold_len, x[1].index))
     nmax = 0
     max_unfold = None
     for unfold, e in sl:
diff --git a/src/make_unicode_property.sh b/src/make_unicode_property.sh
index 7503e7b..d36484a 100755
--- a/src/make_unicode_property.sh
+++ b/src/make_unicode_property.sh
@@ -13,8 +13,8 @@ POOL_CAST='s/\(int *\)\(size_t *\)&\(\(struct +unicode_prop_name_pool_t *\* *\)
 ADD_STATIC='s/(const +struct +PoolPropertyNameCtype +\*)/static \1/'
 ADD_CAST='s/unsigned +int +hval *= *len/unsigned int hval = (unsigned int )len/'
 
-python2 make_unicode_property_data.py > ${NAME}.gperf
-python2 make_unicode_property_data.py -posix > ${NAME}_posix.gperf
+python3 make_unicode_property_data.py > ${NAME}.gperf
+python3 make_unicode_property_data.py -posix > ${NAME}_posix.gperf
 
 ${GPERF} ${GPERF_OPT} -N unicode_lookup_property_name --output-file ${TMP1} ${NAME}.gperf
 cat ${TMP1} | ${SED} -e 's/^#line.*$//g' | ${SED} -E "${POOL_CAST}" | ${SED} -E "${ADD_STATIC}" | ${SED} -E "${ADD_CAST}" > ${NAME}.c
diff --git a/src/make_unicode_property_data.py b/src/make_unicode_property_data.py
index d30a92b..11c453b 100755
--- a/src/make_unicode_property_data.py
+++ b/src/make_unicode_property_data.py
@@ -1,7 +1,7 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # make_unicode_property_data.py
-# Copyright (c) 2016-2022  K.Kosako
+# Copyright (c) 2016-2023  K.Kosako
 
 import sys
 import re
@@ -46,31 +46,31 @@ def fix_block_name(name):
 
 def print_ranges(ranges):
   for (start, end) in ranges:
-    print "0x%06x, 0x%06x" % (start, end)
+    print("0x%06x, 0x%06x" % (start, end))
 
-  print len(ranges)
+  print(len(ranges))
 
 def print_prop_and_index(prop, i):
-  print "%-35s %3d" % (prop + ',', i)
+  print("%-35s %3d" % (prop + ',', i))
   PropIndex[prop] = i
 
 PRINT_CACHE = { }
 
 def print_property(prop, data, desc):
-  print ''
-  print "/* PROPERTY: '%s': %s */" % (prop, desc)
+  print('')
+  print("/* PROPERTY: '%s': %s */" % (prop, desc))
 
   prev_prop = dic_find_by_value(PRINT_CACHE, data)
   if prev_prop is not None:
-    print "#define CR_%s CR_%s" % (prop, prev_prop)
+    print("#define CR_%s CR_%s" % (prop, prev_prop))
   else:
     PRINT_CACHE[prop] = data
-    print "static const OnigCodePoint"
-    print "CR_%s[] = { %d," % (prop, len(data))
+    print("static const OnigCodePoint")
+    print("CR_%s[] = { %d," % (prop, len(data)))
     for (start, end) in data:
-      print "0x%04x, 0x%04x," % (start, end)
+      print("0x%04x, 0x%04x," % (start, end))
 
-    print "}; /* END of CR_%s */" % prop
+    print("}; /* END of CR_%s */" % prop)
 
 
 def dic_find_by_value(dic, v):
@@ -100,7 +100,7 @@ def normalize_ranges(in_ranges, sort=False):
   r = []
   prev = None
   for (start, end) in ranges:
-    if prev >= start - 1:
+    if prev is not None and prev >= start - 1:
       (pstart, pend) = r.pop()
       end = max(pend, end)
       start = pstart
@@ -175,14 +175,14 @@ def merge_dic(to_dic, from_dic):
   from_keys = from_dic.keys()
   common = list(set(to_keys) & set(from_keys))
   if len(common) != 0:
-    print >> sys.stderr, "merge_dic: collision: %s" % sorted(common)
+    print("merge_dic: collision: %s" % sorted(common), file=sys.stderr)
 
   to_dic.update(from_dic)
 
 def merge_props(to_props, from_props):
   common = list(set(to_props) & set(from_props))
   if len(common) != 0:
-    print >> sys.stderr, "merge_props: collision: %s" % sorted(common)
+    print("merge_props: collision: %s" % sorted(common), file=sys.stderr)
 
   to_props.extend(from_props)
 
@@ -406,7 +406,7 @@ def set_max_prop_name(name):
 def entry_prop_name(name, index):
   set_max_prop_name(name)
   if OUTPUT_LIST_MODE and index >= len(POSIX_LIST):
-    print >> UPF, "%s" % (name)
+    print("%s" % (name), file=UPF)
 
 def entry_and_print_prop_and_index(name, index):
   entry_prop_name(name, index)
@@ -426,7 +426,7 @@ argc = len(argv)
 
 COPYRIGHT = '''
 /*-
- * Copyright (c) 2016-2022  K.Kosako
+ * Copyright (c) 2016-2023  K.Kosako
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -462,7 +462,7 @@ for i in range(1, argc):
   elif arg == '-gc':
     INCLUDE_GRAPHEME_CLUSTER_DATA = True
   else:
-    print >> sys.stderr, "Invalid argument: %s" % arg
+    print("Invalid argument: %s" % arg, file=sys.stderr)
 
 
 OUTPUT_LIST_MODE = not(POSIX_ONLY)
@@ -519,9 +519,9 @@ PROPS = sorted(PROPS)
 s = '''%{
 /* Generated by make_unicode_property_data.py. */
 '''
-print s
-print COPYRIGHT
-print ''
+print(s)
+print(COPYRIGHT)
+print('')
 
 for prop in POSIX_LIST:
   if prop == 'PosixPunct':
@@ -531,7 +531,7 @@ for prop in POSIX_LIST:
 
   print_property(prop, DIC[prop], desc)
 
-print ''
+print('')
 
 if not(POSIX_ONLY):
   for prop in PROPS:
@@ -551,18 +551,18 @@ if not(POSIX_ONLY):
     print_property(block, DIC[block], 'Block')
 
 
-print ''
-print "static const OnigCodePoint*\nconst CodeRanges[] = {"
+print('')
+print("static const OnigCodePoint*\nconst CodeRanges[] = {")
 
 for prop in POSIX_LIST:
-  print "  CR_%s," % prop
+  print("  CR_%s," % prop)
 
 if not(POSIX_ONLY):
   for prop in PROPS:
-    print "  CR_%s," % prop
+    print("  CR_%s," % prop)
 
   for prop in BLOCKS:
-    print "  CR_%s," % prop
+    print("  CR_%s," % prop)
 
 s = '''};
 
@@ -585,8 +585,8 @@ if OUTPUT_LIST_MODE:
   if EMOJI_VERSION_INFO[0] < 0:
     raise RuntimeError("Emoji Version is not found")
 
-  print >> UPF, "Unicode Properties (Unicode Version: %d.%d.%d,  Emoji: %d.%d)" % (VERSION_INFO[0], VERSION_INFO[1], VERSION_INFO[2], EMOJI_VERSION_INFO[0], EMOJI_VERSION_INFO[1])
-  print >> UPF, ''
+  print("Unicode Properties (Unicode Version: %d.%d.%d,  Emoji: %d.%d)" % (VERSION_INFO[0], VERSION_INFO[1], VERSION_INFO[2], EMOJI_VERSION_INFO[0], EMOJI_VERSION_INFO[1]), file=UPF)
+  print('', file=UPF)
 
 index = -1
 for prop in POSIX_LIST:
@@ -598,16 +598,16 @@ if not(POSIX_ONLY):
     index += 1
     entry_and_print_prop_and_index(prop, index)
 
-  NALIASES = map(lambda (k,v):(normalize_prop_name(k), k, v), ALIASES.items())
+  NALIASES = map(lambda x:(normalize_prop_name(x[0]), x[0], x[1]), ALIASES.items())
   NALIASES = sorted(NALIASES)
   for (nk, k, v) in NALIASES:
     nv = normalize_prop_name(v)
     if PropIndex.get(nk, None) is not None:
-      print >> sys.stderr, "ALIASES: already exists: %s => %s" % (k, v)
+      print("ALIASES: already exists: %s => %s" % (k, v), file=sys.stderr)
       continue
     aindex = PropIndex.get(nv, None)
     if aindex is None:
-      #print >> sys.stderr, "ALIASES: value is not exist: %s => %s" % (k, v)
+      #print("ALIASES: value is not exist: %s => %s" % (k, v), file=sys.stderr)
       continue
 
     entry_prop_name(k, aindex)
@@ -617,26 +617,26 @@ if not(POSIX_ONLY):
     index += 1
     entry_and_print_prop_and_index(name, index)
 
-print '%%'
-print ''
+print('%%')
+print('')
 if not(POSIX_ONLY):
   if VERSION_INFO[0] < 0:
     raise RuntimeError("Unicode Version is not found")
   if EMOJI_VERSION_INFO[0] < 0:
     raise RuntimeError("Emoji Version is not found")
 
-  print "#define UNICODE_PROPERTY_VERSION  %02d%02d%02d" % (VERSION_INFO[0], VERSION_INFO[1], VERSION_INFO[2])
-  print "#define UNICODE_EMOJI_VERSION     %02d%02d" % (EMOJI_VERSION_INFO[0], EMOJI_VERSION_INFO[1])
-  print ''
+  print("#define UNICODE_PROPERTY_VERSION  %02d%02d%02d" % (VERSION_INFO[0], VERSION_INFO[1], VERSION_INFO[2]))
+  print("#define UNICODE_EMOJI_VERSION     %02d%02d" % (EMOJI_VERSION_INFO[0], EMOJI_VERSION_INFO[1]))
+  print('')
 
-print "#define PROPERTY_NAME_MAX_SIZE  %d" % (PROPERTY_NAME_MAX_LEN + 10)
-print "#define CODE_RANGES_NUM         %d" % (index + 1)
+print("#define PROPERTY_NAME_MAX_SIZE  %d" % (PROPERTY_NAME_MAX_LEN + 10))
+print("#define CODE_RANGES_NUM         %d" % (index + 1))
 
 index_props = make_reverse_dic(PropIndex)
-print ''
+print('')
 for i in range(index + 1):
   for p in index_props[i]:
-    print "#define PROP_INDEX_%s %d" % (p.upper(), i)
+    print("#define PROP_INDEX_%s %d" % (p.upper(), i))
 
 if OUTPUT_LIST_MODE:
   UPF.close()
diff --git a/src/make_unicode_wb.sh b/src/make_unicode_wb.sh
index 0dabbd4..61fafe5 100755
--- a/src/make_unicode_wb.sh
+++ b/src/make_unicode_wb.sh
@@ -2,6 +2,6 @@
 
 NAME=unicode_wb_data
 
-python2 make_unicode_wb_data.py > ${NAME}.c
+python3 make_unicode_wb_data.py > ${NAME}.c
 
 exit 0
diff --git a/src/make_unicode_wb_data.py b/src/make_unicode_wb_data.py
index 4f6599e..fc7d93a 100755
--- a/src/make_unicode_wb_data.py
+++ b/src/make_unicode_wb_data.py
@@ -1,7 +1,7 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # make_unicode_wb_data.py
-# Copyright (c) 2019-2022  K.Kosako
+# Copyright (c) 2019-2023  K.Kosako
 
 import sys
 import re
@@ -29,10 +29,10 @@ def check_version_info(s):
 
 def print_ranges(ranges):
   for (start, end) in ranges:
-    print "0x%06x, 0x%06x" % (start, end)
+    print("0x%06x, 0x%06x" % (start, end))
 
 def print_prop_and_index(prop, i):
-  print "%-35s %3d" % (prop + ',', i)
+  print("%-35s %3d" % (prop + ',', i))
   PropIndex[prop] = i
 
 def dic_find_by_value(dic, v):
@@ -52,7 +52,7 @@ def normalize_ranges(in_ranges, sort=False):
   r = []
   prev = None
   for (start, end) in ranges:
-    if prev >= start - 1:
+    if prev is not None and prev >= start - 1:
       (pstart, pend) = r.pop()
       end = max(pend, end)
       start = pstart
@@ -192,10 +192,11 @@ merge_props(PROPS, props)
 
 PROPS = sorted(PROPS)
 
-print '/* unicode_wb_data.c: Generated by make_unicode_wb_data.py. */'
+print('/* unicode_wb_data.c: Generated by make_unicode_wb_data.py. */')
+
 COPYRIGHT = '''
 /*-
- * Copyright (c) 2019-2022  K.Kosako
+ * Copyright (c) 2019-2023  K.Kosako
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -221,13 +222,13 @@ COPYRIGHT = '''
  */
 '''.strip()
 
-print COPYRIGHT
-print ''
+print(COPYRIGHT)
+print('')
 if VERSION_INFO[0] < 0:
   raise RuntimeError("Version is not found.")
 
-print "#define WORD_BREAK_PROPERTY_VERSION  %02d%02d%02d" % (VERSION_INFO[0], VERSION_INFO[1], VERSION_INFO[2])
-print ''
+print("#define WORD_BREAK_PROPERTY_VERSION  %02d%02d%02d" % (VERSION_INFO[0], VERSION_INFO[1], VERSION_INFO[2]))
+print('')
 
 ranges = []
 for prop in PROPS:
@@ -243,16 +244,16 @@ for (start, end, prop) in ranges:
     raise ValueError("{2}:{0} - {1} range overlap prev value {3}".format(start, end, prop, prev))
 
 
-print '/*'
+print('/*')
 for prop in PROPS:
-  print "%s" % prop
-print '*/'
-print ''
+  print("%s" % prop)
+print('*/')
+print('')
 
 num_ranges = len(ranges)
-print "static int WB_RANGE_NUM = %d;" % num_ranges
+print("static int WB_RANGE_NUM = %d;" % num_ranges)
 
-print 'static WB_RANGE_TYPE WB_RANGES[] = {'
+print('static WB_RANGE_TYPE WB_RANGES[] = {')
 for i, (start, end, prop) in enumerate(ranges):
   if i == num_ranges - 1:
     comma = ''
@@ -260,8 +261,8 @@ for i, (start, end, prop) in enumerate(ranges):
     comma = ','
 
   type_name = 'WB_' + prop
-  print " {0x%06x, 0x%06x, %s }%s" % (start, end, type_name, comma)
+  print(" {0x%06x, 0x%06x, %s }%s" % (start, end, type_name, comma))
 
-print '};'
+print('};')
 
 sys.exit(0)