From a503520ac51d16558ce91f7d7fc9d30a910d928c Mon Sep 17 00:00:00 2001
From: Thomas Waldmann <tw@waldmann-edv.de>
Date: Tue, 21 May 2013 23:34:25 +0200
Subject: [PATCH 1/2] copy _compat.py from flask in here (and adapt docstring)

---
 flask/_compat.py | 104 +++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 100 insertions(+), 4 deletions(-)

diff --git a/flask/_compat.py b/flask/_compat.py
index 3743a54c..776a2dd7 100644
--- a/flask/_compat.py
+++ b/flask/_compat.py
@@ -3,11 +3,107 @@
     flask._compat
     ~~~~~~~~~~~~~
 
-    Some py2/py3 compatibility support that is not yet available in
-    "six" 1.3.0.
-    There are bugs open for "six" for all this stuff, so we can remove it
-    again from here as soon as we require a new enough "six" release.
+    Some py2/py3 compatibility support based on a stripped down
+    version of six so we don't have to depend on a specific version
+    of it.
 
     :copyright: (c) 2013 by Armin Ronacher.
     :license: BSD, see LICENSE for more details.
 """
+import sys
+
+PY2 = sys.version_info[0] == 2
+PYPY = hasattr(sys, 'pypy_translation_info')
+_identity = lambda x: x
+
+
+if not PY2:
+    unichr = chr
+    range_type = range
+    text_type = str
+    string_types = (str,)
+
+    iterkeys = lambda d: iter(d.keys())
+    itervalues = lambda d: iter(d.values())
+    iteritems = lambda d: iter(d.items())
+
+    import pickle
+    from io import BytesIO, StringIO
+    NativeStringIO = StringIO
+
+    def reraise(tp, value, tb=None):
+        if value.__traceback__ is not tb:
+            raise value.with_traceback(tb)
+        raise value
+
+    ifilter = filter
+    imap = map
+    izip = zip
+    intern = sys.intern
+
+    implements_iterator = _identity
+    implements_to_string = _identity
+    encode_filename = _identity
+    get_next = lambda x: x.__next__
+
+else:
+    unichr = unichr
+    text_type = unicode
+    range_type = xrange
+    string_types = (str, unicode)
+
+    iterkeys = lambda d: d.iterkeys()
+    itervalues = lambda d: d.itervalues()
+    iteritems = lambda d: d.iteritems()
+
+    import cPickle as pickle
+    from cStringIO import StringIO as BytesIO, StringIO
+    NativeStringIO = BytesIO
+
+    exec('def reraise(tp, value, tb=None):\n raise tp, value, tb')
+
+    from itertools import imap, izip, ifilter
+    intern = intern
+
+    def implements_iterator(cls):
+        cls.next = cls.__next__
+        del cls.__next__
+        return cls
+
+    def implements_to_string(cls):
+        cls.__unicode__ = cls.__str__
+        cls.__str__ = lambda x: x.__unicode__().encode('utf-8')
+        return cls
+
+    get_next = lambda x: x.next
+
+    def encode_filename(filename):
+        if isinstance(filename, unicode):
+            return filename.encode('utf-8')
+        return filename
+
+
+def with_metaclass(meta, *bases):
+    # This requires a bit of explanation: the basic idea is to make a
+    # dummy metaclass for one level of class instanciation that replaces
+    # itself with the actual metaclass.  Because of internal type checks
+    # we also need to make sure that we downgrade the custom metaclass
+    # for one level to something closer to type (that's why __call__ and
+    # __init__ comes back from type etc.).
+    #
+    # This has the advantage over six.with_metaclass in that it does not
+    # introduce dummy classes into the final MRO.
+    class metaclass(meta):
+        __call__ = type.__call__
+        __init__ = type.__init__
+        def __new__(cls, name, this_bases, d):
+            if this_bases is None:
+                return type.__new__(cls, name, (), d)
+            return meta(name, bases, d)
+    return metaclass('temporary_class', None, {})
+
+
+try:
+    from urllib.parse import quote_from_bytes as url_quote
+except ImportError:
+    from urllib import quote as url_quote

From e1d356fb713f3272db2a23f9f898c34c5dc79dc0 Mon Sep 17 00:00:00 2001
From: Thomas Waldmann <tw@waldmann-edv.de>
Date: Wed, 22 May 2013 01:33:04 +0200
Subject: [PATCH 2/2] ported some more stuff to py 3.3

removed init_jinja_globals hack from app.py after consulting mitsuhiko
(didn't work on py 3.3 "as is")

removed with_statement future imports, not needed any more

needs more work on 2.7 as well as on 3.3
---
 examples/flaskr/flaskr.py       |  2 +-
 examples/minitwit/minitwit.py   |  2 +-
 flask/_compat.py                |  6 ++++++
 flask/app.py                    | 33 +++++++++------------------------
 flask/config.py                 |  5 ++---
 flask/exthook.py                |  3 ++-
 flask/helpers.py                |  9 ++++-----
 flask/testing.py                |  4 +---
 flask/testsuite/__init__.py     |  5 ++---
 flask/testsuite/appctx.py       |  2 --
 flask/testsuite/basic.py        |  4 +---
 flask/testsuite/blueprints.py   |  2 --
 flask/testsuite/config.py       |  1 -
 flask/testsuite/deprecations.py | 19 +------------------
 flask/testsuite/ext.py          |  5 ++---
 flask/testsuite/helpers.py      |  4 +---
 flask/testsuite/regression.py   |  4 +---
 flask/testsuite/reqctx.py       |  2 --
 flask/testsuite/signals.py      |  1 -
 flask/testsuite/subclassing.py  |  2 +-
 flask/testsuite/templating.py   |  2 --
 flask/testsuite/testing.py      |  2 --
 flask/testsuite/views.py        |  2 +-
 scripts/flaskext_test.py        |  2 --
 24 files changed, 36 insertions(+), 87 deletions(-)

diff --git a/examples/flaskr/flaskr.py b/examples/flaskr/flaskr.py
index 0647fc7b..20254660 100644
--- a/examples/flaskr/flaskr.py
+++ b/examples/flaskr/flaskr.py
@@ -9,7 +9,7 @@
     :copyright: (c) 2010 by Armin Ronacher.
     :license: BSD, see LICENSE for more details.
 """
-from __future__ import with_statement
+
 from sqlite3 import dbapi2 as sqlite3
 from flask import Flask, request, session, g, redirect, url_for, abort, \
      render_template, flash, _app_ctx_stack
diff --git a/examples/minitwit/minitwit.py b/examples/minitwit/minitwit.py
index a92da6af..2863de50 100644
--- a/examples/minitwit/minitwit.py
+++ b/examples/minitwit/minitwit.py
@@ -8,7 +8,7 @@
     :copyright: (c) 2010 by Armin Ronacher.
     :license: BSD, see LICENSE for more details.
 """
-from __future__ import with_statement
+
 import time
 from sqlite3 import dbapi2 as sqlite3
 from hashlib import md5
diff --git a/flask/_compat.py b/flask/_compat.py
index 776a2dd7..27f61137 100644
--- a/flask/_compat.py
+++ b/flask/_compat.py
@@ -22,6 +22,7 @@ if not PY2:
     range_type = range
     text_type = str
     string_types = (str,)
+    integer_types = (int, )
 
     iterkeys = lambda d: iter(d.keys())
     itervalues = lambda d: iter(d.values())
@@ -46,11 +47,14 @@ if not PY2:
     encode_filename = _identity
     get_next = lambda x: x.__next__
 
+    from urllib.parse import urlparse
+
 else:
     unichr = unichr
     text_type = unicode
     range_type = xrange
     string_types = (str, unicode)
+    integer_types = (int, long)
 
     iterkeys = lambda d: d.iterkeys()
     itervalues = lambda d: d.itervalues()
@@ -82,6 +86,8 @@ else:
             return filename.encode('utf-8')
         return filename
 
+    from urlparse import urlparse
+
 
 def with_metaclass(meta, *bases):
     # This requires a bit of explanation: the basic idea is to make a
diff --git a/flask/app.py b/flask/app.py
index 0337c608..dc684489 100644
--- a/flask/app.py
+++ b/flask/app.py
@@ -9,8 +9,6 @@
     :license: BSD, see LICENSE for more details.
 """
 
-from __future__ import with_statement
-
 import os
 import sys
 from threading import Lock
@@ -36,6 +34,7 @@ from .templating import DispatchingJinjaLoader, Environment, \
     _default_template_ctx_processor
 from .signals import request_started, request_finished, got_request_exception, \
     request_tearing_down, appcontext_tearing_down
+from flask._compat import reraise, string_types, integer_types
 
 # a lock used for logger initialization
 _logger_lock = Lock()
@@ -585,21 +584,7 @@ class Flask(_PackageBoundObject):
     @locked_cached_property
     def jinja_env(self):
         """The Jinja2 environment used to load templates."""
-        rv = self.create_jinja_environment()
-
-        # Hack to support the init_jinja_globals method which is supported
-        # until 1.0 but has an API deficiency.
-        if getattr(self.init_jinja_globals, 'im_func', None) is not \
-           Flask.init_jinja_globals.__func__:
-            from warnings import warn
-            warn(DeprecationWarning('This flask class uses a customized '
-                'init_jinja_globals() method which is deprecated. '
-                'Move the code from that method into the '
-                'create_jinja_environment() method instead.'))
-            self.__dict__['jinja_env'] = rv
-            self.init_jinja_globals()
-
-        return rv
+        return self.create_jinja_environment()
 
     @property
     def got_first_request(self):
@@ -1090,7 +1075,7 @@ class Flask(_PackageBoundObject):
     def _register_error_handler(self, key, code_or_exception, f):
         if isinstance(code_or_exception, HTTPException):
             code_or_exception = code_or_exception.code
-        if isinstance(code_or_exception, (int, long)):
+        if isinstance(code_or_exception, integer_types):
             assert code_or_exception != 500 or key is None, \
                 'It is currently not possible to register a 500 internal ' \
                 'server error on a per-blueprint level.'
@@ -1137,7 +1122,7 @@ class Flask(_PackageBoundObject):
           def is_prime(n):
               if n == 2:
                   return True
-              for i in xrange(2, int(math.ceil(math.sqrt(n))) + 1):
+              for i in range(2, int(math.ceil(math.sqrt(n))) + 1):
                   if n % i == 0:
                       return False
               return True
@@ -1383,7 +1368,7 @@ class Flask(_PackageBoundObject):
             if isinstance(e, typecheck):
                 return handler(e)
 
-        raise exc_type, exc_value, tb
+        reraise(exc_type, exc_value, tb)
 
     def handle_exception(self, e):
         """Default exception handling that kicks in when an exception
@@ -1405,7 +1390,7 @@ class Flask(_PackageBoundObject):
             # (the function was actually called from the except part)
             # otherwise, we just raise the error again
             if exc_value is e:
-                raise exc_type, exc_value, tb
+                reraise(exc_type, exc_value, tb)
             else:
                 raise e
 
@@ -1565,14 +1550,14 @@ class Flask(_PackageBoundObject):
             # set the headers and status.  We do this because there can be
             # some extra logic involved when creating these objects with
             # specific values (like defualt content type selection).
-            if isinstance(rv, basestring):
+            if isinstance(rv, string_types):
                 rv = self.response_class(rv, headers=headers, status=status)
                 headers = status = None
             else:
                 rv = self.response_class.force_type(rv, request.environ)
 
         if status is not None:
-            if isinstance(status, basestring):
+            if isinstance(status, string_types):
                 rv.status = status
             else:
                 rv.status_code = status
@@ -1633,7 +1618,7 @@ class Flask(_PackageBoundObject):
         # still the same one we can reraise it with the original traceback,
         # otherwise we raise it from here.
         if error is exc_value:
-            raise exc_type, exc_value, tb
+            reraise(exc_type, exc_value, tb)
         raise error
 
     def preprocess_request(self):
diff --git a/flask/config.py b/flask/config.py
index 3afe623a..ddb113a5 100644
--- a/flask/config.py
+++ b/flask/config.py
@@ -9,13 +9,12 @@
     :license: BSD, see LICENSE for more details.
 """
 
-from __future__ import with_statement
-
 import imp
 import os
 import errno
 
 from werkzeug.utils import import_string
+from flask._compat import string_types
 
 
 class ConfigAttribute(object):
@@ -158,7 +157,7 @@ class Config(dict):
 
         :param obj: an import name or object
         """
-        if isinstance(obj, basestring):
+        if isinstance(obj, string_types):
             obj = import_string(obj)
         for key in dir(obj):
             if key.isupper():
diff --git a/flask/exthook.py b/flask/exthook.py
index 26578f0f..89dac47b 100644
--- a/flask/exthook.py
+++ b/flask/exthook.py
@@ -21,6 +21,7 @@
 """
 import sys
 import os
+from flask._compat import reraise
 
 
 class ExtensionImporter(object):
@@ -77,7 +78,7 @@ class ExtensionImporter(object):
                 # we swallow it and try the next choice.  The skipped frame
                 # is the one from __import__ above which we don't care about
                 if self.is_important_traceback(realname, tb):
-                    raise exc_type, exc_value, tb.tb_next
+                    reraise(exc_type, exc_value, tb.tb_next)
                 continue
             module = sys.modules[fullname] = sys.modules[realname]
             if '.' not in modname:
diff --git a/flask/helpers.py b/flask/helpers.py
index 68ebc74e..1359bba6 100644
--- a/flask/helpers.py
+++ b/flask/helpers.py
@@ -9,8 +9,6 @@
     :license: BSD, see LICENSE for more details.
 """
 
-from __future__ import with_statement
-
 import os
 import sys
 import pkgutil
@@ -27,6 +25,7 @@ from functools import update_wrapper
 from werkzeug.datastructures import Headers
 from werkzeug.exceptions import NotFound
 import six
+from flask._compat import string_types, text_type
 
 # this was moved in 0.7
 try:
@@ -467,7 +466,7 @@ def send_file(filename_or_fp, mimetype=None, as_attachment=False,
                           :data:`~flask.current_app`.
     """
     mtime = None
-    if isinstance(filename_or_fp, basestring):
+    if isinstance(filename_or_fp, string_types):
         filename = filename_or_fp
         file = None
     else:
@@ -478,7 +477,7 @@ def send_file(filename_or_fp, mimetype=None, as_attachment=False,
         # XXX: this behavior is now deprecated because it was unreliable.
         # removed in Flask 1.0
         if not attachment_filename and not mimetype \
-           and isinstance(filename, basestring):
+           and isinstance(filename, string_types):
             warn(DeprecationWarning('The filename support for file objects '
                 'passed to send_file is now deprecated.  Pass an '
                 'attach_filename if you want mimetypes to be guessed.'),
@@ -540,7 +539,7 @@ def send_file(filename_or_fp, mimetype=None, as_attachment=False,
             os.path.getmtime(filename),
             os.path.getsize(filename),
             adler32(
-                filename.encode('utf-8') if isinstance(filename, unicode)
+                filename.encode('utf-8') if isinstance(filename, text_type)
                 else filename
             ) & 0xffffffff
         ))
diff --git a/flask/testing.py b/flask/testing.py
index bdd3860f..ef116cf3 100644
--- a/flask/testing.py
+++ b/flask/testing.py
@@ -10,12 +10,10 @@
     :license: BSD, see LICENSE for more details.
 """
 
-from __future__ import with_statement
-
 from contextlib import contextmanager
 from werkzeug.test import Client, EnvironBuilder
 from flask import _request_ctx_stack
-from urlparse import urlparse
+from flask._compat import urlparse
 
 
 def make_test_environ_builder(app, path='/', base_url=None, *args, **kwargs):
diff --git a/flask/testsuite/__init__.py b/flask/testsuite/__init__.py
index 9027369c..82fa3232 100644
--- a/flask/testsuite/__init__.py
+++ b/flask/testsuite/__init__.py
@@ -11,17 +11,16 @@
 """
 
 from __future__ import print_function
-from __future__ import with_statement
 
 import os
 import sys
 import flask
 import warnings
 import unittest
-from StringIO import StringIO
 from functools import update_wrapper
 from contextlib import contextmanager
 from werkzeug.utils import import_string, find_modules
+from flask._compat import reraise, StringIO
 
 
 def add_to_path(path):
@@ -159,7 +158,7 @@ class _ExceptionCatcher(object):
             self.test_case.fail('Expected exception of type %r' %
                                 exception_name)
         elif not issubclass(exc_type, self.exc_type):
-            raise exc_type, exc_value, tb
+            reraise(exc_type, exc_value, tb)
         return True
 
 
diff --git a/flask/testsuite/appctx.py b/flask/testsuite/appctx.py
index aa71e11e..afed923a 100644
--- a/flask/testsuite/appctx.py
+++ b/flask/testsuite/appctx.py
@@ -9,8 +9,6 @@
     :license: BSD, see LICENSE for more details.
 """
 
-from __future__ import with_statement
-
 import flask
 import unittest
 from flask.testsuite import FlaskTestCase
diff --git a/flask/testsuite/basic.py b/flask/testsuite/basic.py
index 89159a16..974b4ebc 100644
--- a/flask/testsuite/basic.py
+++ b/flask/testsuite/basic.py
@@ -9,8 +9,6 @@
     :license: BSD, see LICENSE for more details.
 """
 
-from __future__ import with_statement
-
 import re
 import uuid
 import flask
@@ -1060,7 +1058,7 @@ class BasicFunctionalityTestCase(FlaskTestCase):
             1/0
 
         c = app.test_client()
-        for x in xrange(3):
+        for x in range(3):
             with self.assert_raises(ZeroDivisionError):
                 c.get('/fail')
 
diff --git a/flask/testsuite/blueprints.py b/flask/testsuite/blueprints.py
index eba43e63..331854a6 100644
--- a/flask/testsuite/blueprints.py
+++ b/flask/testsuite/blueprints.py
@@ -9,8 +9,6 @@
     :license: BSD, see LICENSE for more details.
 """
 
-from __future__ import with_statement
-
 import flask
 import unittest
 import warnings
diff --git a/flask/testsuite/config.py b/flask/testsuite/config.py
index ca142cff..415d8aca 100644
--- a/flask/testsuite/config.py
+++ b/flask/testsuite/config.py
@@ -8,7 +8,6 @@
     :copyright: (c) 2011 by Armin Ronacher.
     :license: BSD, see LICENSE for more details.
 """
-from __future__ import with_statement
 
 import os
 import sys
diff --git a/flask/testsuite/deprecations.py b/flask/testsuite/deprecations.py
index 795a5d3d..56371822 100644
--- a/flask/testsuite/deprecations.py
+++ b/flask/testsuite/deprecations.py
@@ -9,30 +9,13 @@
     :license: BSD, see LICENSE for more details.
 """
 
-from __future__ import with_statement
-
 import flask
 import unittest
 from flask.testsuite import FlaskTestCase, catch_warnings
 
 
 class DeprecationsTestCase(FlaskTestCase):
-
-    def test_init_jinja_globals(self):
-        class MyFlask(flask.Flask):
-            def init_jinja_globals(self):
-                self.jinja_env.globals['foo'] = '42'
-
-        with catch_warnings() as log:
-            app = MyFlask(__name__)
-            @app.route('/')
-            def foo():
-                return app.jinja_env.globals['foo']
-
-            c = app.test_client()
-            self.assert_equal(c.get('/').data, '42')
-            self.assert_equal(len(log), 1)
-            self.assert_('init_jinja_globals' in str(log[0]['message']))
+    """not used currently"""
 
 
 def suite():
diff --git a/flask/testsuite/ext.py b/flask/testsuite/ext.py
index 6f6a34f4..147e23b0 100644
--- a/flask/testsuite/ext.py
+++ b/flask/testsuite/ext.py
@@ -8,7 +8,6 @@
     :copyright: (c) 2011 by Armin Ronacher.
     :license: BSD, see LICENSE for more details.
 """
-from __future__ import with_statement
 
 import sys
 import unittest
@@ -22,7 +21,7 @@ class ExtImportHookTestCase(FlaskTestCase):
         # that a real flaskext could be in there which would disable our
         # fake package.  Secondly we want to make sure that the flaskext
         # import hook does not break on reloading.
-        for entry, value in sys.modules.items():
+        for entry, value in list(sys.modules.items()):
             if (entry.startswith('flask.ext.') or
                 entry.startswith('flask_') or
                 entry.startswith('flaskext.') or
@@ -100,7 +99,7 @@ class ExtImportHookTestCase(FlaskTestCase):
         self.assert_equal(test_function(), 42)
 
     def test_flaskext_broken_package_no_module_caching(self):
-        for x in xrange(2):
+        for x in range(2):
             with self.assert_raises(ImportError):
                 import flask.ext.broken
 
diff --git a/flask/testsuite/helpers.py b/flask/testsuite/helpers.py
index ac618538..2808a409 100644
--- a/flask/testsuite/helpers.py
+++ b/flask/testsuite/helpers.py
@@ -9,16 +9,14 @@
     :license: BSD, see LICENSE for more details.
 """
 
-from __future__ import with_statement
-
 import os
 import flask
 import unittest
 from logging import StreamHandler
-from StringIO import StringIO
 from flask.testsuite import FlaskTestCase, catch_warnings, catch_stderr
 from werkzeug.http import parse_cache_control_header, parse_options_header
 import six
+from flask._compat import StringIO
 
 
 def has_encoding(name):
diff --git a/flask/testsuite/regression.py b/flask/testsuite/regression.py
index 00219856..b8140d6f 100644
--- a/flask/testsuite/regression.py
+++ b/flask/testsuite/regression.py
@@ -9,8 +9,6 @@
     :license: BSD, see LICENSE for more details.
 """
 
-from __future__ import with_statement
-
 import os
 import gc
 import sys
@@ -77,7 +75,7 @@ class MemoryTestCase(FlaskTestCase):
         if sys.version_info >= (2, 7) and \
                 not hasattr(sys, 'pypy_translation_info'):
             with self.assert_no_leak():
-                for x in xrange(10):
+                for x in range(10):
                     fire()
 
     def test_safe_join_toplevel_pardir(self):
diff --git a/flask/testsuite/reqctx.py b/flask/testsuite/reqctx.py
index 89a47728..0f0282e5 100644
--- a/flask/testsuite/reqctx.py
+++ b/flask/testsuite/reqctx.py
@@ -9,8 +9,6 @@
     :license: BSD, see LICENSE for more details.
 """
 
-from __future__ import with_statement
-
 import flask
 import unittest
 try:
diff --git a/flask/testsuite/signals.py b/flask/testsuite/signals.py
index 0e5d0cea..637c2c66 100644
--- a/flask/testsuite/signals.py
+++ b/flask/testsuite/signals.py
@@ -8,7 +8,6 @@
     :copyright: (c) 2011 by Armin Ronacher.
     :license: BSD, see LICENSE for more details.
 """
-from __future__ import with_statement
 
 import flask
 import unittest
diff --git a/flask/testsuite/subclassing.py b/flask/testsuite/subclassing.py
index 89aa9150..3e8d75c1 100644
--- a/flask/testsuite/subclassing.py
+++ b/flask/testsuite/subclassing.py
@@ -11,9 +11,9 @@
 """
 import flask
 import unittest
-from StringIO import StringIO
 from logging import StreamHandler
 from flask.testsuite import FlaskTestCase
+from flask._compat import StringIO
 
 
 class FlaskSubclassingTestCase(FlaskTestCase):
diff --git a/flask/testsuite/templating.py b/flask/testsuite/templating.py
index 635210f7..c8d1dd22 100644
--- a/flask/testsuite/templating.py
+++ b/flask/testsuite/templating.py
@@ -9,8 +9,6 @@
     :license: BSD, see LICENSE for more details.
 """
 
-from __future__ import with_statement
-
 import flask
 import unittest
 from flask.testsuite import FlaskTestCase
diff --git a/flask/testsuite/testing.py b/flask/testsuite/testing.py
index 2872ecdc..a37f6e6c 100644
--- a/flask/testsuite/testing.py
+++ b/flask/testsuite/testing.py
@@ -9,8 +9,6 @@
     :license: BSD, see LICENSE for more details.
 """
 
-from __future__ import with_statement
-
 import flask
 import unittest
 from flask.testsuite import FlaskTestCase
diff --git a/flask/testsuite/views.py b/flask/testsuite/views.py
index f09c1266..6c3ae816 100644
--- a/flask/testsuite/views.py
+++ b/flask/testsuite/views.py
@@ -8,7 +8,7 @@
     :copyright: (c) 2011 by Armin Ronacher.
     :license: BSD, see LICENSE for more details.
 """
-from __future__ import with_statement
+
 import flask
 import flask.views
 import unittest
diff --git a/scripts/flaskext_test.py b/scripts/flaskext_test.py
index d1d5d991..5b0d9d22 100644
--- a/scripts/flaskext_test.py
+++ b/scripts/flaskext_test.py
@@ -9,8 +9,6 @@
     :license: BSD, see LICENSE for more details.
 """
 
-from __future__ import with_statement
-
 import os
 import sys
 import shutil