Fix support newbytes from future

Previously python2 code using python-future to backport the py3 bytes
behavior would trigger the following exception:

code:

  from builtins import bytes as newbytes
  from pymemcache.client.base import Client
  client = Client(('localhost', 11211))
  client.set(newbytes('key'), 'value')

  Traceback (most recent call last):
    File "<stdin>", line 1, in <module>
    File "/usr/local/lib/python2.7/site-packages/pymemcache/client/base.py", line 297, in set
      return self._store_cmd(b'set', key, expire, noreply, value)
    File "/usr/local/lib/python2.7/site-packages/pymemcache/client/base.py", line 770, in _store_cmd
      key = self.check_key(key)
    File "/usr/local/lib/python2.7/site-packages/pymemcache/client/base.py", line 251, in check_key
      key_prefix=self.key_prefix)
    File "/usr/local/lib/python2.7/site-packages/pymemcache/client/base.py", line 91, in _check_key
      key = key.encode('ascii')
    File "/usr/local/lib/python2.7/site-packages/future/types/newbytes.py", line 381, in __getattribute__
      raise AttributeError("encode method has been disabled in newbytes")
  AttributeError: encode method has been disabled in newbytes

Add a test case for this and fix.

1 files changed, 1 insertions, 0 deletions

diff --git a/test-requirements.txt b/test-requirements.txt
index 7bcdf2e..5c3424a 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -4,3 +4,4 @@ pytest-cov
 gevent==1.3.6; "PyPy" not in platform_python_implementation
 pylibmc
 python-memcached
+future