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[Plareplane]

How do I read the region chunks in python? The following does not do what I'd expect it to do:

Code: Show/Hide # demo from asss import * # magic numbers rTIL = 0x4C495472 rNAM = 0x4D414E72 rNAW = 0x57414E72 rBSE = 0x45534272 rAWP = 0x50574172 chat = get_interface(I_CHAT) mapd = get_interface(I_MAPDATA) def mm_attach(arena):    arena.wbgoal = mapd.FindRegionByName(arena, "wbgoal")    # i should have all of these    arena.rAWP = mapd.RegionChunk(arena.wbgoal, rAWP)    arena.rBSE = mapd.RegionChunk(arena.wbgoal, rBSE)    arena.rNAM = mapd.RegionChunk(arena.wbgoal, rNAM)    arena.rTIL = mapd.RegionChunk(arena.wbgoal, rTIL)    # i shouldn't have any rNAW    arena.rNAW = mapd.RegionChunk(arena.wbgoal, rNAW)    # let's see what we get    chat.SendArenaMessage(arena, "rAWP" + str(type(arena.rAWP)))    chat.SendArenaMessage(arena, "rBSE" + str(type(arena.rBSE)))    chat.SendArenaMessage(arena, "rNAM" + str(type(arena.rNAM)))    chat.SendArenaMessage(arena, "rTIL" + str(type(arena.rTIL)))    chat.SendArenaMessage(arena, "rNAW" + str(type(arena.rNAW)))

Here's the output:

Code: Show/Hide          Plareplane> ?|attmod -d demo|rmmod demo|insmod <py> demo|attmod demo Module demo detached. Module demo unloaded successfully Module <py> demo loaded successfully rAWP<type 'str'> rBSE<type 'str'> rNAM<type 'NoneType'> rTIL<type 'NoneType'> rNAW<type 'NoneType'> Module demo attached.          Plareplane> ?py print(a.rAWP) E <pymod> error in command handler for 'py'          Plareplane> ?py print(a.rBSE)          Plareplane> ?py print(a.rNAM) None          Plareplane> ?py print(a.rTIL) None          Plareplane> ?py print(a.rNAW) None

The error in print(a.rAWP) is:

Code: Show/Hide Traceback (most recent call last):   File "/home/plareplane/software/asss/bin/exec.py", line 46, in c_py     chat.SendMessage(player, l) TypeError: argument 2 must be string without null bytes, not str

Shouldn't I be getting some sort of tuple for rAWP, rNAM, and rTIL? (Or a list of bytes would be nice.) Why do I get None for rNAM and rTIL?

Also, what is required to make a callback in c available in python? I see that the available python callbacks have a /* pycb ... */ in the c code, but I'm not sure what else there is to it. Specifically, I'd like to use the CB_REGION callback, but the guide on the wiki seems to say that it is not currently available.

[Plareplane]

Also, I only started learning python a couple days ago from reading the python module guide coupled with occasional glances at the api on python.org, so if something is outrageously bad in the above learning example, let me know.

[Smong]

You should probably check if arena.wbgoal is None before you try to use it.

Why the other stuff doesn't work I don't know. You can edit game.h line 93 if you want to play with CB_REGION, although I don't know if that will actually work since it must be disabled for a reason (increased server load maybe).

[Plareplane]

I didn't bother checking wbgoal because I just editted a map specifically with a region named wbgoal just to test how things work. Can FindRegionByName return None in this case?

[Grelminar]

The type error is pretty clear: your chunk has nul bytes in it. Strings are the most efficient way to pass around binary data in python, and so RegionChunk returns strings (or None, if the chunk isn't there). Chunks can contain binary data, but strings used for messages can't (actually, that's the first time I heard of that restriction, but it makes sense).

Adding a pycb thing for CB_REGION should be enough. I think the reason it's not there is because it gets called synchronously in the unreliable thread, and having a callback do a lot of work there would be bad. Feel free to add it, just be careful about doing stuff that could take too long.

[Smong]

Code: Show/Hide    int (*RegionChunk)(Region *rgn, u32 ctype, const void **datap, int *sizep);    /* pyint: region, int, bufp out, int buflen out -> void */

Since it says 'out' twice, why doesn't it return a tuple with 2 elements?

[Grelminar]

Because bufp/buflen parameters are handled specially. I suppose I could change it so the second "out" isn't required, but conceptually, it is an "out" parameter, so it makes sense to have it there.

[Plareplane]

[Smong]

I don't think rPYC is implemented. Although it would be extremely cool if it was. It would save having to make custom region types for things like object toggling, ship changing and prizing.

[Plareplane]

Changed a line in src/include/game.h and added a few lines to scripts/pymod-process.py. CB_REGION seems to work now (at least for my simple test of flying over a region and having a module call out the name of the region).

[Plareplane]

I don't think too many people will be interested, but I wrote/translated a py version of autowarp. It seems to work after some minutes of testing.

[Smong]

Hmm. When you unpack I think you can do something like this:

Code: Show/Hide x, y, name = unpack("hh16s", aw)

That would help to make it more readable.

[Plareplane]

Newbie pythoner me didn't know that. Suggestion taken.

Now, if only I can figure out why RegionChunk still can't find chunk type rNAM and rTIL