Index: Doc/c-api/unicode.rst
===================================================================
--- Doc/c-api/unicode.rst	(revision 63755)
+++ Doc/c-api/unicode.rst	(working copy)
@@ -144,6 +144,13 @@
 
    Return 1 or 0 depending on whether *ch* is an alphanumeric character.
 
+.. cfunction:: int Py_UNICODE_ISPRINTABLE(Py_UNICODE ch)
+
+   Return 1 or 0 depending on whether *ch* is a printable character.
+   Characters defined in the Unicode character database as "Other"
+   or "Separator" other than ASCII space(0x20) are not considered
+   printable.
+
 These APIs can be used for fast direct character conversions:
 
 
@@ -228,6 +235,9 @@
    +===================+=====================+================================+
    | :attr:`%%`        | *n/a*               | The literal % character.       |
    +-------------------+---------------------+--------------------------------+
+   | :attr:`%a`        | PyObject\*          | The result of calling          |
+   |                   |                     | :func:`ascii`.                 |
+   +-------------------+---------------------+--------------------------------+
    | :attr:`%c`        | int                 | A single character,            |
    |                   |                     | represented as an C int.       |
    +-------------------+---------------------+--------------------------------+
Index: Doc/library/functions.rst
===================================================================
--- Doc/library/functions.rst	(revision 63755)
+++ Doc/library/functions.rst	(working copy)
@@ -91,6 +91,14 @@
           return False
 
 
+.. function:: ascii(object)
+
+   As :func:`repr`, return a string containing a printable
+   representation of an object. But unlike :func:`repr`, the non-ASCII
+   characters in the string returned by :func:`ascii`() are hex-escaped
+   to generate a same string as :func:`repr` in Python 2.
+
+
 .. function:: bin(x)
 
    Convert an integer number to a binary string. The result is a valid Python
Index: Doc/library/stdtypes.rst
===================================================================
--- Doc/library/stdtypes.rst	(revision 63755)
+++ Doc/library/stdtypes.rst	(working copy)
@@ -774,6 +774,14 @@
    least one cased character, false otherwise.
 
 
+.. method:: str.isprintable()
+
+   Return true if all cased characters in the string are printable and there is at
+   least one cased character, false otherwise. Characters defined in the Unicode 
+   character database as "Other" or "Separator" other than ASCII space(0x20) are 
+   not considered printable.
+
+
 .. method:: str.isspace()
 
    Return true if there are only whitespace characters in the string and there is