python: add a sample code to get back @stat_count when ks_asm() fails…

…. see issue keystone-engine#228

bindings/python/sample_asm_count.py

@@ -0,0 +1,29 @@
+#!/usr/bin/env python
+
+# By Nguyen Anh Quynh <[email protected]>, 2016
+# Sample code for Keystone assembler engine.
+
+# This shows how to get out of KsError the number of
+# assembly instructions successfully compiled when error occur
+
+
+from keystone import *
+
+CODE = b"INC ecx; yyy; DEC edx" # input assembly with an invalid instruction
+
+try:
+    # Initialize engine in X86-32bit mode
+    ks = Ks(KS_ARCH_X86, KS_MODE_32)
+    encoding, count = ks.asm(CODE)
+    print("%s = %s" %(CODE, encoding))
+except KsError as e:
+    print("ERROR: %s" %e)
+    # get count via e.get_asm_count()
+    count = e.get_asm_count()
+    if count is not None:
+        # print out the number of instructions succesfully compiled
+        print("asmcount = %u" %e.get_asm_count())
+
+
+
+