+
−from __future__ import absolute_import, division, print_function, unicode_literals
+
−
+
−import locale
+
−import sys
+
−
+
−sys_encoding = locale.getpreferredencoding()
+
−
+
−USING_PYTHON2 = True if sys.version_info < (3, 0) else False
+
−
+
−if USING_PYTHON2:
+
−    str = unicode  # noqa
+
−else:
+
−    str = str
+
−
+
−
+
−def ensure_bytes(x, encoding=sys_encoding):
+
−    if not isinstance(x, bytes):
+
−        x = x.encode(encoding)
+
−    return x
+
−
+
−
+
−def ensure_str(x, encoding=sys_encoding):
+
−    if not isinstance(x, str):
+
−        x = x.decode(encoding)
+
−    return x