feature: NO DNS? fa nulla...

su linux funge...
su altri non so...da testare!!!

lib/dns/_compat.py

@@ -0,0 +1,59 @@
+import sys
+import decimal
+from decimal import Context
+
+PY3 = sys.version_info[0] == 3
+PY2 = sys.version_info[0] == 2
+
+
+if PY3:
+    long = int
+    xrange = range
+else:
+    long = long  # pylint: disable=long-builtin
+    xrange = xrange  # pylint: disable=xrange-builtin
+
+# unicode / binary types
+if PY3:
+    text_type = str
+    binary_type = bytes
+    string_types = (str,)
+    unichr = chr
+    def maybe_decode(x):
+        return x.decode()
+    def maybe_encode(x):
+        return x.encode()
+    def maybe_chr(x):
+        return x
+    def maybe_ord(x):
+        return x
+else:
+    text_type = unicode  # pylint: disable=unicode-builtin, undefined-variable
+    binary_type = str
+    string_types = (
+        basestring,  # pylint: disable=basestring-builtin, undefined-variable
+    )
+    unichr = unichr  # pylint: disable=unichr-builtin
+    def maybe_decode(x):
+        return x
+    def maybe_encode(x):
+        return x
+    def maybe_chr(x):
+        return chr(x)
+    def maybe_ord(x):
+        return ord(x)
+
+
+def round_py2_compat(what):
+    """
+    Python 2 and Python 3 use different rounding strategies in round(). This
+    function ensures that results are python2/3 compatible and backward
+    compatible with previous py2 releases
+    :param what: float
+    :return: rounded long
+    """
+    d = Context(
+        prec=len(str(long(what))),  # round to integer with max precision
+        rounding=decimal.ROUND_HALF_UP
+    ).create_decimal(str(what))  # str(): python 2.6 compat
+    return long(d)