Restore deleted code - cast Py3 strings to byte strings

theano/gof/cmodule.py

@@ -1878,6 +1878,11 @@ class Compiler:
                 path = '"' + path + '"'
                 exe_path = '"' + exe_path + '"'
             try:
+                # Python3 compatibility: try to cast Py3 strings as Py2 strings
+                try:
+                    src_code = b(src_code)
+                except Exception:
+                    pass
                 os.write(fd, src_code)
                 os.close(fd)
                 fd = None