Discord minesweeper grid generator with emojis and spoiler tags

discordminesweeper.py

#!/bin/python3
import sys
import random

emojis = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "X"]
mine = -1


def gen_grid(num_row, num_col, mines):
    grid = [[0 for col in range(num_col)] for row in range(num_row)]
    half_x = num_col // 2
    half_y = num_row // 2

    # generate mines randomly
    for _ in range(mines):
        y = random.randint(0, num_row-1)
        x = random.randint(0, num_col-1)
        grid[y][x] = mine

    # the position of the zero we're going to reveal
    zero_pos = (-1, -1)

    # go through the grid and count up neighboring mines
    for y, row in enumerate(grid):
        for x, cell in enumerate(row):
            if cell != mine:
                # for ±1 cell in each direction
                for j in range(-1, 2):
                    for i in range(-1, 2):
                        ny = y+j
                        nx = x+i
                        # out of bounds check
                        if ny >= 0 and nx >= 0 and ny < num_row and nx < num_col:
                            grid[y][x] += grid[ny][nx] == -1
            if grid[y][x] == 0:
                # save the zero position if it's closer than our previous one to the middle
                zy, zx = zero_pos
                if abs(y - half_y) + abs(x - half_x) < abs(zy - half_y) + abs(zx - half_x):
                    zero_pos = (y, x)

    # print out grid
    for y, row in enumerate(grid):
        for x, cell in enumerate(row):
            emoji = f"`{emojis[cell]}`"
            if zero_pos != (y, x):
                # spoiler it, not our starting 0
                emoji = f"||{emoji}||"
            sys.stdout.write(f"{emoji}")
        print("")


# 4x5 grid with 3-ish mines
gen_grid(4, 5, 3)