added rearc impl

reasoning_gym/arc/rearc_board_format.py

@@ -0,0 +1,83 @@
+from dataclasses import dataclass
+from typing import List, Tuple
+
+
+@dataclass
+class BoardFormattingOptions:
+    alphabet: list[str]
+    col_delimiter: str
+    row_delimiter: str
+    array_brackets: bool
+
+
+def format_arc_task(
+    input_grid: Tuple[Tuple[int, ...], ...], output_grid: Tuple[Tuple[int, ...], ...], options: BoardFormattingOptions
+) -> str:
+
+    buffer = []
+    if options.task_identifier:
+        buffer.append(f"ARC Task: {options.task_identifier}")
+
+    buffer.append("\nInput Grid:")
+    buffer.append(format_board(input_grid, options))
+
+    buffer.append("\n\nOutput Grid:")
+    buffer.append(format_board(output_grid, options))
+
+    return "\n".join(buffer)
+
+
+def format_board(
+    board: List[List[int]], formatting_options: BoardFormattingOptions, with_board_shape: bool = False
+) -> str:
+    alphabet = formatting_options.alphabet
+    col_delimiter = formatting_options.col_delimiter
+    row_delimiter = formatting_options.row_delimiter
+    array_brackets = formatting_options.array_brackets
+
+    h, w = len(board), len(board[0])
+    buffer = []
+
+    if with_board_shape:
+        buffer.append(f"Shape: {h}x{w}\n")
+
+    if array_brackets:
+        buffer.append(f"[")
+        for row in range(h):
+            if row > 0 and row_delimiter:
+                buffer.append(row_delimiter)
+            buffer.append("[")
+            for col in range(w):
+                if col > 0 and col_delimiter:
+                    buffer.append(col_delimiter)
+                value = board[row][col]
+                buffer.append(alphabet[value])
+            buffer.append("]")
+        buffer.append("]")
+    else:
+        for row in range(h):
+            if row > 0 and row_delimiter:
+                buffer.append(row_delimiter)
+            for col in range(w):
+                if col > 0 and col_delimiter:
+                    buffer.append(col_delimiter)
+                value = board[row][col]
+                buffer.append(alphabet[value])
+
+    return "".join(buffer)
+
+
+def format_board_pair(
+    index: int,
+    pair: dict[str, List[List[int]]],
+    formatting_options: BoardFormattingOptions,
+) -> str:
+    input_element = format_board(
+        pair["input"],
+        formatting_options=formatting_options,
+    )
+    output_element = format_board(
+        pair["output"],
+        formatting_options=formatting_options,
+    )
+    return f"Example {index}:\n\nInput:\n{input_element}\nOutput:\n{output_element}\n\n"