More python 3.x fixes:

theano/gof/cc.py

@@ -9,7 +9,7 @@ import os
 import StringIO
 import sys
 from itertools import izip
-
+from six import PY3
 
 import numpy
 
@@ -17,7 +17,9 @@ if sys.version_info[:2] >= (3, 0):
     import hashlib
 
     def hash_from_code(msg):
-        return hashlib.md5(msg.encode()).hexdigest()
+        # Python 3 does not like module names that start with
+        # a digit.
+        return 'm' + hashlib.md5(msg.encode()).hexdigest()
 
 elif sys.version_info[:2] >= (2, 5):
     import hashlib
@@ -1232,19 +1234,25 @@ class CLinker(link.Linker):
 
         # Static methods that can run and destroy the struct built by
         # instantiate.
+        if PY3:
+            static = """
+        int {struct_name}_executor({struct_name} *self) {{
+            return self->run();
+        }}
+
+        void {struct_name}_destructor(PyObject *capsule) {{
+            {struct_name} *self = ({struct_name} *)PyCapsule_GetContext(capsule);
+            delete self;
+        }}
+        """.format(struct_name=self.struct_name)
+        else:
             static = """
         int %(struct_name)s_executor(%(struct_name)s* self) {
             return self->run();
         }
 
         void %(struct_name)s_destructor(void* executor, void* self) {
-            //printf("doing cleanup\\n");
-            //fflush(stdout);
-            // ((%(struct_name)s*)self)->cleanup();
-            // free(self);
             delete ((%(struct_name)s*)self);
-            //printf("done cleanup\\n");
-            //fflush(stdout);
         }
         """ % dict(struct_name=self.struct_name)
 
@@ -1310,6 +1318,16 @@ class CLinker(link.Linker):
         print >> code, '  }'
         print >> code, '  %(struct_name)s* struct_ptr = new %(struct_name)s();' % locals()
         print >> code, '  struct_ptr->init(', ','.join('PyTuple_GET_ITEM(argtuple, %i)' % n for n in xrange(n_args)), ');'
+        if PY3:
+            print >> code, """\
+    PyObject* thunk = PyCapsule_New((void*)(&{struct_name}_executor), NULL, {struct_name}_destructor);
+    if (thunk != NULL && PyCapsule_SetContext(thunk, struct_ptr) != 0) {{
+        PyErr_Clear();
+        Py_DECREF(thunk);
+        thunk = NULL;
+    }}
+""".format(**locals())
+        else:
             print >> code, '  PyObject* thunk = PyCObject_FromVoidPtrAndDesc((void*)(&%(struct_name)s_executor), struct_ptr, %(struct_name)s_destructor);' % locals()
         print >> code, "  return thunk; }"
         return code.getvalue()

theano/gof/cmodule.py

@@ -13,7 +13,7 @@ import subprocess
 import sys
 import tempfile
 import time
-from six import b, next
+from six import PY3, b, next
 
 import distutils.sysconfig
 
@@ -165,6 +165,22 @@ class DynamicModule(object):
         print >> stream, "};"
 
     def print_init(self, stream):
+        if PY3:
+            print >> stream, """\
+static struct PyModuleDef moduledef = {{
+      PyModuleDef_HEAD_INIT,
+      "{name}",
+      NULL,
+      -1,
+      MyMethods,
+}};
+""".format(name=self.name)
+            print >> stream, "PyMODINIT_FUNC PyInit_%s(void) {" % self.name
+            for b in self.init_blocks:
+                print >> stream, '  ', b
+            print >> stream, "    PyObject *m = PyModule_Create(&moduledef);"
+            print >> stream, "    return m;"
+        else:
             print >> stream, "PyMODINIT_FUNC init%s(void){" % self.name
             for b in self.init_blocks:
                 print >> stream, '  ', b
@@ -1639,6 +1655,7 @@ class GCC_compiler(object):
         if py_module:
             #touch the __init__ file
             open(os.path.join(location, "__init__.py"), 'w').close()
+            assert os.path.isfile(lib_filename)
             return dlimport(lib_filename)
 
 

theano/gof/cutils.py

 import os
 import sys
+from six import PY3
 from theano.gof.compilelock import get_lock, release_lock
 from theano import config
 
@@ -38,8 +39,29 @@ def compile_cutils():
             {"run_cthunk",  run_cthunk, METH_VARARGS|METH_KEYWORDS,
              "Run a theano cthunk."},
             {NULL, NULL, 0, NULL}        /* Sentinel */
+        };"""
+    if PY3:
+        # This is not the most efficient code, but it is written this way to highlight
+        # the changes needed to make 2.x code compile under python 3.
+        code = code.replace("<Python.h>", '"numpy/npy_3kcompat.h"', 1)
+        code = code.replace("PyCObject", "NpyCapsule")
+        code += """
+        static struct PyModuleDef moduledef = {
+            PyModuleDef_HEAD_INIT,
+            "cutils_ext",
+            NULL,
+            -1,
+            CutilsExtMethods,
         };
 
+        PyMODINIT_FUNC
+        PyInit_cutils_ext(void) {
+            return PyModule_Create(&moduledef);
+        }
+        }
+    """
+    else:
+        code += """
         PyMODINIT_FUNC
         initcutils_ext(void)
         {
@@ -68,7 +90,7 @@ try:
     if not os.path.exists(location):
         os.mkdir(location)
     if not os.path.exists(os.path.join(location, '__init__.py')):
-        file(os.path.join(location, '__init__.py'), 'w').close()
+        open(os.path.join(location, '__init__.py'), 'w').close()
 
     try:
         from cutils_ext.cutils_ext import *

theano/gof/lazylinker_c.c.txt

@@ -1023,7 +1023,8 @@ static struct PyModuleDef moduledef = {
 #endif
 #if defined(NPY_PY3K)
 #define RETVAL m
-PyObject *PyInit_lazylinker_ext(void) {
+PyMODINIT_FUNC
+PyInit_lazylinker_ext(void) {
 #else
 #define RETVAL
 PyMODINIT_FUNC