Remove asserts from Python testcase

Also rename testcase python_pybuf to python_pybuffer.

Examples/test-suite/python_pybuffer.i

@@ -0,0 +1,64 @@
+%module python_pybuffer
+%include <pybuffer.i>
+%include <cstring.i>
+/*functions for the test case*/
+%pybuffer_mutable_binary(char *buf1, int len);
+%pybuffer_mutable_string(char *buf2);
+%pybuffer_binary(const char *buf3, int len);
+%pybuffer_string(const char *buf4);
+
+%inline %{
+  void func1(char *buf1, int len)
+  {
+    int i;
+    for (i=0; i<len; ++i)
+      buf1[i] = 'a';
+    return;
+  }
+  void func2(char *buf2)
+  {
+    strcpy(buf2, "Hello world!");
+  }
+  int func3(const char *buf3, int len)
+  {
+    int count = 0;
+    int i;
+    for(i=0; i<len; ++i)
+      if (isalnum(buf3[i]))
+        ++count;
+    return count;
+  }
+  int func4(const char *buf4)
+  {
+    return strlen(buf4);
+  }  
+%}
+
+/*functions for the benchmark*/
+%pybuffer_mutable_string(char *str1);
+%cstring_mutable(char *str2);
+
+%inline %{
+void title(char *str) {
+    int outword = 1;
+    while(*str) {
+        if (isalnum(*str)) {
+            if (outword) {
+                outword = 0;
+                *str = toupper(*str);
+            }            
+        }
+        else {
+            outword = 0;
+        }
+        str++;
+    }
+}
+
+void title1(char *str1) {
+    title(str1);
+}
+void title2(char *str2) {
+    title(str2);
+}
+%}