[Tutor] how to struct.pack a unicode string?

[eryksun]

A clarification: in the default mode ('@'), struct uses native
alignment padding, but not if you override this with <, >, =, or !, as
you did.

>> fmt = endianness + str(len(hello)) + "s"
>
> That's the wrong length. Use the length of the encoded string.

Generally, however, you'd use a fixed size set by the struct
definition. For example:

    typedef struct _point {
        unsigned int x;
        unsigned int y;
        char label[8];
    } point;


Python:

    >>> struct.pack('II8s', *[1, 2, b'12345678This is ignored'])
    b'\x01\x00\x00\x00\x02\x00\x00\x0012345678'

Null termination may or may not be required. Python will pad out the
rest of the string with nulls if it's less than the specified length:

    >>> struct.pack('II8s', *[1, 2, b'1234'])
    b'\x01\x00\x00\x00\x02\x00\x00\x001234\x00\x00\x00\x00'