On Wed, Apr 15, 2015 at 1:48 PM, IronManMark20 <mr.smit...@gmail.com> wrote: > I am using ctypes to call a few windll funcions. One of them returns a c_long > object. I want to know what number the function returns. > > Problem is, when I try foo.value , it gives me this: > > AttributeError: LP_c_long object has no attribute value. > > Any idea of what could cause this?
The error message indicates that this is not actually a c_long object, but an LP_c_long object; i.e., a pointer to a c_long. You can dereference the pointer using the contents attribute: >>> x = ctypes.c_long(42) >>> px = ctypes.pointer(x) >>> px <__main__.LP_c_long object at 0x7fd0812d7950> >>> px.contents c_long(42) >>> px.contents.value 42 See https://docs.python.org/3.4/library/ctypes.html#pointers for more details on working with pointers in ctypes. -- https://mail.python.org/mailman/listinfo/python-list
