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#!/usr/bin/env python3
 
from random import randint
 
# 大域変数定義
empty = '□'
wall = '■'
right, down, left, up, = 0, 1, 2, 3
direction = [right, down, left, up]
 
# フィールド作成
def make_field(x, y):
    return [[wall if i == 0 or i == x - 1 or j == 0 or j == y - 1 or (i % 2 == 0 and j % 2 == 0) else empty for j in range(y)] for i in range(x)]
 
# サイコロ定義
def dice(n):
    return direction[randint(0, n - 1)]
 
# 条件により n 面体サイコロが代わり、
# 変換されたリストのどこを変更するか決める
def select(n, i, j, field):
    direction = dice(n)
    match direction:
        case 0:
            i += 1
        case 1:
            i -= 1
        case 2:
            j += 1
        case 3:
            j -= 1
    field[i][j] = wall
 
# maze(迷路)作成
def make_maze(field):
    for i in range(2, len(field) - 1, 2):
        for j in range(2, len(field[0]) - 1, 2):
            if i == 2:
                select(4, i, j, field)
            elif field[i][j - 1] == wall:
                select(2, i, j, field)
            else:
                select(3, i, j, field)
    return field
 
# フィールド(迷路)を文字列に変換
def maze2string(maze):
    return ''.join([''.join(i) + '\n' for i in maze])
 
if __name__ == '__main__':
    print(maze2string(make_maze(make_field(11, 11))))
 

Traceback (most recent call last):
  File "/usr/lib/python3.9/py_compile.py", line 144, in compile
    code = loader.source_to_code(source_bytes, dfile or file,
  File "<frozen importlib._bootstrap_external>", line 918, in source_to_code
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "./prog.py", line 23
    match direction:
          ^
SyntaxError: invalid syntax

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python3.9/py_compile.py", line 150, in compile
    raise py_exc
py_compile.PyCompileError:   File "./prog.py", line 23
    match direction:
          ^
SyntaxError: invalid syntax

Standard output is empty