Installable under Python 3.3

[okin]

This are some fixes that should make it possible to at least install this projekt under Python 3.3.
Running the tests under Python 3.3 fails with an segmentation fault.

[msabramo]

Could use:

from setup_common import SafeConfigParser

See #59

[msabramo]

👍

This passes for me on py26 and py27 and crashes with a segfault on py33, as you said.

$ tox -e py26,py27,py33
...
  py26: commands succeeded
  py27: commands succeeded
ERROR:   py33: commands failed

$ .tox/py33/bin/nosetests -w tests -v
test_BLOB (test_MySQLdb_capabilities.test_MySQLdb) ... [4]    309 segmentation fault  .tox/py33/bin/nosetests -w tests -v

I have some minor suggestions, but otherwise this is good to merge I think.

[msabramo]

Trying to figure out what's wrong by looking at core dump. In case this is useful for someone with more knowledge of CPython and more recent experience with C:

$ ulimit -c unlimited 
$ .tox/py33/bin/nosetests -w tests -v
test_BLOB (test_MySQLdb_capabilities.test_MySQLdb) ... [4]    1578 segmentation fault (core dumped)  .tox/py33/bin/nosetests -w tests -v
$ lldb -c /cores/core.939
error: core.939 is a corrupt mach-o file: load command 185 LC_SEGMENT_64 has a fileoff + filesize (0x17e56000) that extends beyond the end of the file (0x17e55000), the segment will be truncated
error: core.939 is a corrupt mach-o file: load command 186 LC_SEGMENT_64 has a fileoff (0x17e56000) that extends beyond the end of the file (0x17e55000)
Core file '/cores/core.939' (x86_64) was loaded.
Process 0 stopped
* thread #1: tid = 0x0000, 0x00000001000639ec Python`PyObject_Malloc + 92, stop reason = signal SIGSTOP
    frame #0: 0x00000001000639ec Python`PyObject_Malloc + 92
Python`PyObject_Malloc + 92:
-> 0x1000639ec:  movq   (%rsi), %rax
   0x1000639ef:  movq   %rax, 8(%rcx)
   0x1000639f3:  movq   %rsi, %rdx
   0x1000639f6:  testq  %rax, %rax
(lldb) bt 10
* thread #1: tid = 0x0000, 0x00000001000639ec Python`PyObject_Malloc + 92, stop reason = signal SIGSTOP
    frame #0: 0x00000001000639ec Python`PyObject_Malloc + 92
    frame #1: 0x000000010008396f Python`PyUnicode_New + 175
    frame #2: 0x000000010009af5d Python`_PyUnicode_FromASCII + 109
    frame #3: 0x000000010015b22e Python`_textiowrapper_readline + 1678
    frame #4: 0x000000010015b3ac Python`textiowrapper_iternext + 236
    frame #5: 0x0000000100042997 Python`listextend + 199
    frame #6: 0x000000010000d5a8 Python`PyObject_Call + 104
    frame #7: 0x000000010000dca6 Python`callmethod + 134
    frame #8: 0x000000010000f217 Python`_PyObject_CallMethodId_SizeT + 183
    frame #9: 0x000000010014e2f9 Python`iobase_readlines + 233

[methane]

diff --git a/MySQLdb/connections.py b/MySQLdb/connections.py
index 13e55c4..6c7c03a 100644
--- a/MySQLdb/connections.py
+++ b/MySQLdb/connections.py
@@ -10,8 +10,12 @@
 from _mysql_exceptions import Warning, Error, InterfaceError, DataError, \
      DatabaseError, OperationalError, IntegrityError, InternalError, \
      NotSupportedError, ProgrammingError
-import types, _mysql
+import _mysql
 import re
+import sys
+
+if sys.version_info[0] == 3:
+    unicode = str


 def defaulterrorhandler(connection, cursor, errorclass, errorvalue):
@@ -233,8 +237,8 @@ def string_decoder(s):
             self.converter[FIELD_TYPE.VARCHAR].append((None, string_decoder))
             self.converter[FIELD_TYPE.BLOB].append((None, string_decoder))

-        self.encoders[types.StringType] = string_literal
-        self.encoders[types.UnicodeType] = unicode_literal
+        self.encoders[bytes] = string_literal
+        self.encoders[unicode] = unicode_literal
         self._transactional = self.server_capabilities & CLIENT.TRANSACTIONS
         if self._transactional:
             if autocommit is not None:
diff --git a/MySQLdb/cursors.py b/MySQLdb/cursors.py
index b45ddaf..4c884a3 100644
--- a/MySQLdb/cursors.py
+++ b/MySQLdb/cursors.py
@@ -7,15 +7,11 @@

 import re
 import sys
-try:
-    from types import ListType, TupleType, UnicodeType
-except ImportError:
-    # Python 3
-    ListType = list
-    TupleType = tuple
-    UnicodeType = str
-
-restr = r"""
+
+if sys.version_info[0] == 3:
+    unicode = str
+
+restr = rb"""
     \s
     values
     \s*
@@ -305,7 +301,7 @@ def callproc(self, procname, args=()):
         q = "CALL %s(%s)" % (procname,
                              ','.join(['@_%s_%d' % (procname, i)
                                        for i in range(len(args))]))
-        if type(q) is UnicodeType:
+        if type(q) is unicode:
             q = q.encode(db.unicode_literal.charset)
         self._query(q)
         self._executed = q
diff --git a/tests/capabilities.py b/tests/capabilities.py
index 076361c..e1760a7 100644
--- a/tests/capabilities.py
+++ b/tests/capabilities.py
@@ -9,7 +9,10 @@
 import array
 import unittest
 from configdb import connection_factory
+import sys

+if sys.version_info[0] == 3:
+    unichr = chr

 class DatabaseTest(unittest.TestCase):

[methane]

@msabramo
I've fixed one memory corruption on #61.
Could you try it?

[msabramo]

@methane: #61 seemed to stop the segfault on Python 3.3 but it segfaults on Python 2.6 and 2.7 -- both locally and on Travis CI: https://travis-ci.org/farcepest/MySQLdb1/builds/23126432

[okin]

I made the changes suggested by @msabramo regarding the use of SafeConfigParser from setup_common.py.