diff -r 2b4b475f2ed3 Lib/csv.py
--- a/Lib/csv.py	Sat Dec 13 16:13:24 2014 -0500
+++ b/Lib/csv.py	Sun Dec 14 10:41:31 2014 +0530
@@ -8,12 +8,14 @@
                  unregister_dialect, get_dialect, list_dialects, \
                  field_size_limit, \
                  QUOTE_MINIMAL, QUOTE_ALL, QUOTE_NONNUMERIC, QUOTE_NONE, \
+                 QUOTE_STRINGS, QUOTE_NOTNULL, \
                  __doc__
 from _csv import Dialect as _Dialect
 
 from io import StringIO
 
 __all__ = [ "QUOTE_MINIMAL", "QUOTE_ALL", "QUOTE_NONNUMERIC", "QUOTE_NONE",
+            "QUOTE_STRINGS", "QUOTE_NOTNULL",
             "Error", "Dialect", "__doc__", "excel", "excel_tab",
             "field_size_limit", "reader", "writer",
             "register_dialect", "get_dialect", "list_dialects", "Sniffer",
diff -r 2b4b475f2ed3 Modules/_csv.c
--- a/Modules/_csv.c	Sat Dec 13 16:13:24 2014 -0500
+++ b/Modules/_csv.c	Sun Dec 14 10:41:31 2014 +0530
@@ -55,7 +55,8 @@
 } ParserState;
 
 typedef enum {
-    QUOTE_MINIMAL, QUOTE_ALL, QUOTE_NONNUMERIC, QUOTE_NONE
+    QUOTE_MINIMAL, QUOTE_ALL, QUOTE_NONNUMERIC, QUOTE_NONE,
+    QUOTE_STRINGS, QUOTE_NOTNULL
 } QuoteStyle;
 
 typedef struct {
@@ -68,6 +69,8 @@
     { QUOTE_ALL,        "QUOTE_ALL" },
     { QUOTE_NONNUMERIC, "QUOTE_NONNUMERIC" },
     { QUOTE_NONE,       "QUOTE_NONE" },
+    { QUOTE_STRINGS,    "QUOTE_STRINGS" },
+    { QUOTE_NOTNULL,    "QUOTE_NOTNULL" },
     { 0 }
 };
 
@@ -1219,6 +1222,12 @@
         case QUOTE_ALL:
             quoted = 1;
             break;
+        case QUOTE_STRINGS:
+            quoted = PyUnicode_Check(field);
+            break;
+        case QUOTE_NOTNULL:
+            quoted = field != Py_None;
+            break;
         default:
             quoted = 0;
             break;
@@ -1542,6 +1551,11 @@
 "        csv.QUOTE_NONNUMERIC means that quotes are always placed around\n"
 "            fields which do not parse as integers or floating point\n"
 "            numbers.\n"
+"        csv.QUOTE_STRINGS means that quotes are always placed around\n"
+"            fields which are strings.  Note that the Python value None\n"
+"            is not a string.\n"
+"        csv.QUOTE_NOTNULL means that quotes are only placed around fields\n"
+"            that are not the Python value None.\n"
 "        csv.QUOTE_NONE means that quotes are never placed around fields.\n"
 "    * escapechar - specifies a one-character string used to escape \n"
 "        the delimiter when quoting is set to QUOTE_NONE.\n"