"""自定义信号 — 用户用「字段 + 运算符 + 值」组合出的布尔信号。 职责: - 从 data/user_data/custom_signals/*.json 加载信号定义 - 把每个信号的 conditions 编译成一条 Polars 布尔表达式(AND 组合) - 供 pipeline 在 compute_signals / compute_enriched_today 末尾注入为列 不知道: 引擎、AI、API、回测、监控。纯函数 + 模块级缓存。 设计: - 信号列名加前缀 ``csg_`` 避免与内置 ``signal_`` 列冲突。 - 回测/选股/监控都按列名找信号,因此注入列后零特殊处理即可三处生效。 - 字段白名单 + 固定运算符集,杜绝任意表达式注入。 - 第一版只支持 AND(多条件同时满足)。 """ from __future__ import annotations import json import logging import re from pathlib import Path import polars as pl logger = logging.getLogger(__name__) # ── 常量 ──────────────────────────────────────────────── PREFIX = "csg_" # 自定义信号列名前缀 ID_RE = re.compile(r"^[a-z0-9_]{1,40}$") OPS = {">", ">=", "<", "<=", "==", "!="} # 字段白名单:只允许这些列出现在条件里(防注入)。均为数值型。 # 与 ENRICHED_COLUMNS 的数值列保持一致,排除 symbol/date/name 等非数值列。 ALLOWED_FIELDS: frozenset[str] = frozenset({ # 行情 "open", "high", "low", "close", "volume", "amount", "turnover_rate", "consecutive_limit_ups", "consecutive_limit_downs", # 基础 "prev_close", "change_pct", "change_amount", "amplitude", # 均线 / 指数均线 "ma5", "ma10", "ma20", "ma30", "ma60", "ema5", "ema10", "ema20", "ema30", "ema60", # MACD / BOLL / KDJ / ATR "macd_dif", "macd_dea", "macd_hist", "boll_upper", "boll_lower", "kdj_k", "kdj_d", "kdj_j", "atr_14", # 量价 / 极值 / 动量 / 波动率 / RSI "vol_ma5", "vol_ma10", "vol_ratio_5d", "high_60d", "low_60d", "momentum_5d", "momentum_10d", "momentum_20d", "momentum_30d", "momentum_60d", "annual_vol_20d", "rsi_6", "rsi_14", "rsi_24", }) # 运算符 → Polars 表达式构造器(输入 col_expr, value) _OP_BUILDERS = { ">": lambda c, v: c > v, ">=": lambda c, v: c >= v, "<": lambda c, v: c < v, "<=": lambda c, v: c <= v, "==": lambda c, v: c == v, "!=": lambda c, v: c != v, } # ── 持久化(镜像 strategy/config.py 的写法)────────────── def _dir(data_dir: Path) -> Path: d = data_dir / "user_data" / "custom_signals" d.mkdir(parents=True, exist_ok=True) return d def _path(data_dir: Path, signal_id: str) -> Path: return _dir(data_dir) / f"{signal_id}.json" def load_all(data_dir: Path) -> list[dict]: """读取全部自定义信号定义。损坏的文件被跳过。""" d = _dir(data_dir) out: list[dict] = [] for f in sorted(d.glob("*.json")): try: out.append(json.loads(f.read_text(encoding="utf-8"))) except Exception as e: logger.warning("custom signal load failed %s: %s", f.name, e) return out def save_one(data_dir: Path, sig: dict) -> None: p = _path(data_dir, sig["id"]) p.parent.mkdir(parents=True, exist_ok=True) p.write_text(json.dumps(sig, ensure_ascii=False, indent=2), encoding="utf-8") def delete_one(data_dir: Path, signal_id: str) -> bool: p = _path(data_dir, signal_id) if p.exists(): p.unlink() return True return False # ── 校验 ──────────────────────────────────────────────── def _parse_right(right: str) -> tuple[str, object]: """解析右值。返回 ('field', colname) 或 ('const', float)。""" if isinstance(right, (int, float)): return ("const", float(right)) if not isinstance(right, str): raise ValueError(f"非法右值: {right!r}") if right.startswith("field:"): col = right[len("field:"):] if col not in ALLOWED_FIELDS: raise ValueError(f"右值字段不在白名单: {col}") return ("field", col) # 纯数字 try: return ("const", float(right)) except ValueError: raise ValueError(f"非法右值(应为 field:xxx 或数字): {right!r}") def validate(sig: dict) -> None: """校验一个信号定义,非法则抛 ValueError(含中文信息)。""" sid = sig.get("id", "") if not isinstance(sid, str) or not ID_RE.match(sid): raise ValueError(f"信号 id 非法(仅小写字母数字下划线,1-40字符): {sid!r}") if not isinstance(sig.get("name"), str) or not sig["name"].strip(): raise ValueError("信号 name 不能为空") if sig.get("kind") not in ("entry", "exit", "both"): raise ValueError("kind 必须是 entry / exit / both") conds = sig.get("conditions") if not isinstance(conds, list) or len(conds) == 0: raise ValueError("conditions 不能为空") if len(conds) > 8: raise ValueError("conditions 最多 8 条") for i, c in enumerate(conds): if not isinstance(c, dict): raise ValueError(f"第 {i+1} 个条件格式错误") left = c.get("left", "") if left not in ALLOWED_FIELDS: raise ValueError(f"第 {i+1} 个条件: 字段 {left!r} 不在白名单") if c.get("op") not in OPS: raise ValueError(f"第 {i+1} 个条件: 运算符 {c.get('op')!r} 非法") _parse_right(c.get("right")) # 会校验右值字段/数字 # ── 编译为 Polars 表达式 ───────────────────────────────── def column_name(signal_id: str) -> str: """信号 id → DataFrame 列名(加前缀)。""" return f"{PREFIX}{signal_id}" def build_expressions(signals: list[dict]) -> dict[str, pl.Expr]: """把多个自定义信号编译成 {column_name: pl.Expr}。 - 只处理 enabled != False 的信号。 - 单个信号内多条件用 ``&`` 串联(AND)。 - 编译失败的信号被跳过并告警(不影响其它信号)。 """ out: dict[str, pl.Expr] = {} for sig in signals: if sig.get("enabled") is False: continue try: conds = sig["conditions"] col_name = column_name(sig["id"]) parts: list[pl.Expr] = [] for c in conds: left = c["left"] op = c["op"] kind, val = _parse_right(c["right"]) right_expr = pl.col(val) if kind == "field" else val parts.append(_OP_BUILDERS[op](pl.col(left), right_expr)) combined = parts[0] for p in parts[1:]: combined = combined & p out[col_name] = combined except Exception as e: logger.warning("custom signal compile failed %s: %s", sig.get("id"), e) return out def inject(df: pl.DataFrame, exprs: dict[str, pl.Expr]) -> pl.DataFrame: """把编译好的信号表达式作为列加入 df。仅添加 df 已含其依赖列的信号。""" if df.is_empty() or not exprs: return df cols = set(df.columns) add: dict[str, pl.Expr] = {} for name, expr in exprs.items(): # 提取该表达式引用的所有字段列,缺失则跳过(避免运行时报错) needed = _expr_root_columns(expr) if needed.issubset(cols): add[name] = expr if add: df = df.with_columns([e.alias(n) for n, e in add.items()]) return df def _expr_root_columns(expr: pl.Expr) -> set[str]: """尽力提取表达式里出现的列名。失败则返回空集(保守跳过)。""" try: # Polars 的 meta.root_names() 返回表达式引用的根列名 names = expr.meta.root_names() return set(names) except Exception: return set()