py3: port use as base64 module

src/polyglot/binary.py

@@ -0,0 +1,32 @@
+#!/usr/bin/env python2
+# vim:fileencoding=utf-8
+# License: GPL v3 Copyright: 2019, Kovid Goyal <kovid at kovidgoyal.net>
+
+from __future__ import absolute_import, division, print_function, unicode_literals
+
+from base64 import standard_b64encode, standard_b64decode
+from polyglot.builtins import unicode_type
+
+
+def as_base64_bytes(x, enc='utf-8'):
+    if isinstance(x, unicode_type):
+        x = x.encode(enc)
+    return standard_b64encode(x)
+
+
+def as_base64_unicode(x, enc='utf-8'):
+    if isinstance(x, unicode_type):
+        x = x.encode(enc)
+    return standard_b64encode(x).decode('ascii')
+
+
+def from_base64_unicode(x, enc='utf-8'):
+    if isinstance(x, unicode_type):
+        x = x.encode('ascii')
+    return standard_b64decode(x).decode(enc)
+
+
+def from_base64_bytes(x):
+    if isinstance(x, unicode_type):
+        x = x.encode('ascii')
+    return standard_b64decode(x)