Andrew Dalke's implementation of string.count().
diff --git a/Modules/stropmodule.c b/Modules/stropmodule.c
index 34ac71a..426959e 100644
--- a/Modules/stropmodule.c
+++ b/Modules/stropmodule.c
@@ -617,6 +617,52 @@
}
+static char count__doc__[] =
+"count(s, sub[, start[, end]]) -> int\n\
+\n\
+Return the number of occurrences of substring sub in string\n\
+s[start:end]. Optional arguments start and end are\n\
+interpreted as in slice notation.";
+
+static PyObject *
+strop_count(self, args)
+ PyObject *self; /* Not used */
+ PyObject *args;
+{
+ char *s, *sub;
+ int len, n, j;
+ int i = 0, last = INT_MAX;
+ int m, r;
+
+ if (!PyArg_ParseTuple(args, "s#s#|ii", &s, &len, &sub, &n, &i, &last))
+ return NULL;
+ if (last > len)
+ last = len;
+ if (last < 0)
+ last += len;
+ if (last < 0)
+ last = 0;
+ if (i < 0)
+ i += len;
+ if (i < 0)
+ i = 0;
+ m = last + 1 - n;
+ if (n == 0)
+ return PyInt_FromLong((long) (m-i));
+
+ r = 0;
+ while (i < m) {
+ if (!memcmp(s+i, sub, n)) {
+ r++;
+ i += n;
+ } else {
+ i++;
+ }
+ }
+ return PyInt_FromLong((long) r);
+}
+
+
static char swapcase__doc__[] =
"swapcase(s) -> string\n\
\n\
@@ -1122,6 +1168,7 @@
{"atoi", strop_atoi, 1, atoi__doc__},
{"atol", strop_atol, 1, atol__doc__},
{"capitalize", strop_capitalize, 0, capitalize__doc__},
+ {"count", strop_count, 1, count__doc__},
{"find", strop_find, 1, find__doc__},
{"join", strop_joinfields, 1, joinfields__doc__},
{"joinfields", strop_joinfields, 1, joinfields__doc__},