can pass it around to C functions or store it into C structures. Later,
you can use ``ffi.from_handle(p)`` to retrive the original
``python_object`` from a value with the same ``void *`` pointer.
+*Calling ffi.from_handle(p) is invalid and will likely crash if
+the cdata object returned by new_handle() is not kept alive!*
Note that ``from_handle()`` conceptually works like this: it searches in