expand and build_assimilator does not work

[qq309381]

• pixel_map.py, i delete two sentences

    assert self.bits_per_pixel % 8 == 0, "Unsupported pixel density"
    assert self.width * self.height * self.bits_per_pixel / 8 == len(self._proto.data)
  

• class sentdebot, i delete distribute_works()

or it won't work!

problem :
train probe -- good
build pylons -- good
expand -- bad
build assimilator -- bad

even it get so much money ,it does not work

import sc2
from sc2 import run_game, maps, Race, Difficulty
from sc2.player import Bot, Computer
from sc2.constants import NEXUS, PROBE, PYLON, ASSIMILATOR


class SentdeBot(sc2.BotAI):
    async def on_step(self, iteration):
        await self.build_pylons()  # pylons are protoss supply buildings
        await self.expand()  # expand to a new resource area.
        await self.build_assimilator()  # getting gas

    async def build_workers(self):
        # nexus = command center
        for nexus in self.units(NEXUS).ready.noqueue:
            # we want at least 20 workers, otherwise let's allocate 70% of our supply to workers.
            # later we should use some sort of regression algo maybe for this?

            if self.can_afford(PROBE):
                await self.do(nexus.train(PROBE))

    async def build_pylons(self):
        if self.supply_left < 5 and not self.already_pending(PYLON):
            nexuses = self.units(NEXUS).ready
            if nexuses.exists:
                if self.can_afford(PYLON):
                    await self.build(PYLON, near=nexuses.first)

    async def expand(self):
        if self.units(NEXUS).amount < 2 and self.can_afford(NEXUS):
            await self.expand_now()

    async def build_assimilator(self):
        for nexus in self.units(NEXUS).ready:
            vaspenes = self.state.vespene_geyser.closer_than(25.0, nexus)
            for vaspene in vaspenes:
                if not self.can_afford(ASSIMILATOR):
                    break
                worker = self.select_build_worker(vaspene.position)
                if worker is None:
                    break
                if not self.units(ASSIMILATOR).closer_than(1.0, vaspene).exists:
                    await self.do(worker.build(ASSIMILATOR, vaspene))

run_game(maps.get("AbyssalReefLE"), [
    Bot(Race.Protoss, SentdeBot()),
    Computer(Race.Terran, Difficulty.Easy)
], realtime=False)

[qq309381]

win10 64 bits
python 3.6.8

[qq309381]

i have changed the sc2 from stable to develop version , pixel_maps and distribute_work both ok now, but expand and build assimilator still do not work. build stargate and train spider work correctly
i upgrade the python from 3.6.8 to 3.7.3 now