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Krzysztof kuhy Rudnicki
e0c9befdeb
run(dialect=), run_problem(slug|statement, sql, dialect): ASCII-table parser, per-dialect DDL, value-wise compare. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01WzxdWYGW5NZL5uVpnqmNKo
62 lines
1.8 KiB
Python
62 lines
1.8 KiB
Python
"""LeetCode statement text to ASCII tables (``+---+`` / ``| a |`` blocks)."""
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from __future__ import annotations
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from dataclasses import dataclass
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import html
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import re
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_BREAKS = re.compile(r"</?(?:p|div|pre|li|ul|ol|br|h\d)\b[^>]*>", re.IGNORECASE)
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_TAGS = re.compile(r"</?[a-zA-Z][a-zA-Z0-9]*(?:\s[^<>]*)?/?>")
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_HTML = re.compile(r"</(?:p|pre|div|code|strong|li|ul)>", re.IGNORECASE)
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_MARKS = re.compile(r"\*\*|`")
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@dataclass(frozen=True)
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class Grid:
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columns: list[str]
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rows: list[list[str]]
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@dataclass(frozen=True)
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class Found:
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start: int
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end: int
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grid: Grid
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def to_text(statement: str) -> str:
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"""Plain lines from fetched markdown or raw statement HTML."""
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text = statement
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if _HTML.search(statement):
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text = html.unescape(_TAGS.sub("", _BREAKS.sub("\n", statement)))
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text = text.replace("\r", "").replace("\xa0", " ")
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return _MARKS.sub("", text).strip()
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def _cells(line: str) -> list[str]:
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return [cell.strip() for cell in line.strip().strip("|").split("|")]
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def _grid(block: list[str]) -> Grid | None:
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data = [_cells(ln) for ln in block if not ln.startswith("+")]
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if not data or any(len(row) != len(data[0]) for row in data):
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return None
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return Grid(data[0], data[1:])
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def find_tables(lines: list[str]) -> list[Found]:
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"""Every well-formed table block; ragged or header-less blocks are skipped."""
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found: list[Found] = []
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start: int | None = None
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for i, raw in enumerate([*lines, ""]):
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if raw.strip().startswith(("+", "|")):
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start = i if start is None else start
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continue
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if start is not None:
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grid = _grid([ln.strip() for ln in lines[start:i]])
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if grid is not None:
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found.append(Found(start, i, grid))
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start = None
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return found
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