2to3: Apply unicode fixer.

The unicode fixer strips the u from u'hi' and converts the unicode type
to str. The first won't work for Python 2 and instead we replace the u
prefix with the sixu function borrowed from the six compatibility
package. That function calls the unicode constructor with the
'unicode_escape' encoder so that the many tests using escaped unicode
characters like u'\u0900' will be handled correctly. That makes the
sixu function a bit different from the asunicode function currently in
numpy.compat and also provides a target that can be converted back to
the u prefix when support for Python 3.2 is dropped. Python 3.3
reintroduced the u prefix for compatibility.

The unicode fixer also replaces 'unicode' with 'str' as 'unicode' is no
longer a builtin in Python 3. For code compatibility, 'unicode' is
defined either as 'str' or 'unicode' in numpy.compat so that checks like

    if isinstance(x, unicode):
        ...

will work properly for all python versions.

Closes #3089.

1 files changed, 3 insertions, 1 deletions

diff --git a/numpy/lib/tests/test_regression.py b/numpy/lib/tests/test_regression.py
index 3b70d1ff0..1e9bacdf5 100644
--- a/numpy/lib/tests/test_regression.py
+++ b/numpy/lib/tests/test_regression.py
@@ -1,9 +1,11 @@
 from __future__ import division, absolute_import, print_function
 
 import sys
+
+import numpy as np
 from numpy.testing import *
 from numpy.testing.utils import _assert_valid_refcount
-import numpy as np
+from numpy.compat import unicode
 
 rlevel = 1