Python3 Support

[deton]

Error on Python3.

https://mail-index.netbsd.org/pkgsrc-wip-changes/2024/07/20/msg030934.html

+engine.pyfactory.pymain.py  File "/usr/pkg/share/ibus-tutcode/engine/main.py", line 85
+    except getopt.GetoptError, err:
+           ^^^^^^^^^^^^^^^^^^^^^^^
+SyntaxError: multiple exception types must be parenthesized
+
+tutcode.pyskkdict.py  File "/usr/pkg/share/ibus-tutcode/engine/skkdict.py", line 111
+    except IOError, OSError:
+           ^^^^^^^^^^^^^^^^
+SyntaxError: multiple exception types must be parenthesized
...
+config.py  File "/usr/pkg/share/ibus-tutcode/setup/config.py", line 58
+    print "Can't read config file:", self.__config_path_unexpanded, sys.exc_info()[:1]
+    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+SyntaxError: Missing parentheses in call to 'print'. Did you mean print(...)?