This Python module converts Advent of Code ASCII art letters to plain characters.

At the moment, it supports 6-pixel-tall characters as seen in 2016 Day 8, 2019 Days 8 and 11, and 2021 Day 13. (Support for 10-pixel-tall characters, as seen in 2018 Day 10, is coming soon.)

Put simply, it converts something like this to plain text:

 ██  ███   ██
█  █ █  █ █  █
█  █ ███  █
████ █  █ █
█  █ █  █ █  █
█  █ ███   ██

Advent of Code OCR is available on PyPI:

$ pip install advent-of-code-ocr

Advent of Code OCR officially supports Python 3.7+.

By default, this module recognizes # as a filled pixel and . as an empty pixel. However, you can change this using the fill_pixel and empty_pixel keywork arguments respectively.

from advent_of_code_ocr import convert_6

print(convert_6(".##.\n#..#\n#..#\n####\n#..#\n#..#"))
# A

print(convert_6(" $$ \n$  $\n$  $\n$$$$\n$  $\n$  $", fill_pixel="$", empty_pixel=" "))
# A

You can also convert data that you have in a NumPy array or a nested list:

from advent_of_code_ocr import convert_array_6

array = [
    [0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, 1, 1, 0],
    [1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1],
    [1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 0],
    [1, 1, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 0],
    [1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1],
    [1, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 0],
]
print(convert_array_6(array, fill_pixel=1, empty_pixel=0))
# AOC

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