Added printing requirements

zope/schema/_compat.py

@@ -0,0 +1,58 @@
+import sys
+
+PY3 = sys.version_info[0] >= 3
+
+try:
+    from collections import OrderedDict
+except ImportError:  # pragma: no cover
+    from ordereddict import OrderedDict
+
+# pep 8 friendlyness
+OrderedDict
+
+
+if PY3:  # pragma: no cover
+
+    def b(s):
+        return s.encode("latin-1")
+
+    def u(s):
+        return s
+
+    string_types = str,
+    text_type = str
+    binary_type = bytes
+    integer_types = int,
+
+    def non_native_string(x):
+        if isinstance(x, bytes):
+            return x
+        return bytes(x, 'unicode_escape')
+
+    def make_binary(x):
+        if isinstance(x, bytes):
+            return x
+        return x.encode('ascii')
+
+else:  # pragma: no cover
+
+    def b(s):
+        return s
+
+    def u(s):
+        return unicode(s, "unicode_escape")
+
+    string_types = basestring,
+    text_type = unicode
+    binary_type = str
+    integer_types = (int, long)
+
+    def non_native_string(x):
+        if isinstance(x, unicode):
+            return x
+        return unicode(x, 'unicode_escape')
+
+    def make_binary(x):
+        if isinstance(x, str):
+            return x
+        return x.encode('ascii')