Fix Python 2 and 3 have diffrent default encoding

Cython/Debugger/Cygdb.py

@@ -138,7 +138,8 @@ def main(path_to_debug_info=None, gdb_argv=None, no_import=False):
     tempfilename = make_command_file(path_to_debug_info, no_import=no_import)
     logger.info("Launching %s with command file: %s and gdb_argv: %s",
         options.gdb, tempfilename, gdb_argv)
-    logger.debug('Command file (%s) contains: """\n%s"""', tempfilename, open(tempfilename).read())
+    tempfile_fd = open(tempfilename)
+    logger.debug('Command file (%s) contains: """\n%s"""', tempfilename, tempfile_fd.read())
     logger.info("Spawning %s...", options.gdb)
     p = subprocess.Popen([options.gdb, '-command', tempfilename] + gdb_argv)
     logger.info("Spawned %s (pid %d)", options.gdb, p.pid)
@@ -151,6 +152,8 @@ def main(path_to_debug_info=None, gdb_argv=None, no_import=False):
             pass
         else:
             break
+    logger.debug("Closing temp command file with fd: %s", tempfile_fd)
+    tempfile_fd.close()
     logger.debug("Removing temp command file: %s", tempfilename)
     os.remove(tempfilename)
     logger.debug("Removed temp command file: %s", tempfilename)

Cython/Debugger/libcython.py

@@ -18,6 +18,13 @@ import collections
 
 import gdb
 
+try:  # py3k
+    UNICODE = unicode
+    BYTES = str
+except NameError:  # py2k
+    UNICODE = str
+    BYTES = bytes
+
 try:
     from lxml import etree
     have_lxml = True
@@ -689,7 +696,8 @@ class CyImport(CythonCommand):
     completer_class = gdb.COMPLETE_FILENAME
 
     def invoke(self, args, from_tty):
-        args = args.encode(_filesystemencoding)
+        if isinstance(args, BYTES):
+            args = args.decode(_filesystemencoding)
         for arg in string_to_argv(args):
             try:
                 f = open(arg)