Script to create r/place uncontested pixels

r_place_uncontested_pixels.py

# https://deephaven.io
from deephaven import agg, parquet, empty_table, merge

# Everything pre-whiteout
# https://www.reddit.com/r/place/comments/tzboys/the_rplace_parquet_dataset/
place = parquet.read('2022_place_deephaven.parquet')\
    .where("k<155926002")

# 2000 x 2000 grid
all_pixels = empty_table(2000).view(["x1=(short)i"])\
    .join(empty_table(2000).view(["y1=(short)i"]), [])

# All pixels *not* present in the place table
unused_pixels = all_pixels\
    .where_not_in(place, ["x1", "y1"])

# All pixels in the place table exactly once
one_and_done_pixels = place\
    .count_by("count", ["x1", "y1"])\
    .where("count == 1")\
    .view(["x1", "y1"])

# Light pink background (255, 230, 238)
background_img = all_pixels.view(["x=x1", "y=y1", "rgb=16770798"])

# White for unused (255, 255, 255)
unused_img = unused_pixels.view(["x=x1", "y=y1", "rgb=16777215"])

# One and done (rgb)
one_and_done_img = place\
    .where_in(one_and_done_pixels, ["x1", "y1"])\
    .view(["x=x1", "y=y1", "rgb"])

# Combine all, ensure unused and one-and-done pixels take precedence over background
uncontested_img = merge([background_img, unused_img, one_and_done_img])\
    .last_by(["x", "y"])

write_image(uncontested_img, "/data/uncontested.png")

See output at https://www.reddit.com/r/place/comments/tzz6d9/uncontested_pixels/