add struct

pythonmao · pythonmao · commit 4760cd9cc561 · 2017-02-04T14:22:38.000+08:00
diff --git a/test_struct/test_struct.py b/test_struct/test_struct.py
@@ -0,0 +1,15 @@
+import struct
+import ctypes
+
+mm = struct.pack("hhl", 1, 2, 3)
+#mm = struct.pack("hhl01", 1,2,3) //padding
+nn = struct.unpack('hhl', mm)
+print mm, nn
+
+mm = struct.calcsize('ci') 
+nn = struct.calcsize('ic')
+print mm, nn
+
+mm = ctypes.create_string_buffer(100)
+struct.pack_into('hhl', mm, 0, 1, 2, 3)
+print struct.unpack_from('hhl', mm, 0)
