146 lines
5.0 KiB
Python
146 lines
5.0 KiB
Python
"""Stock code mapping and entity recognition utilities."""
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from __future__ import annotations
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import re
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from typing import Dict, List, Optional, Set, Tuple
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# 股票代码正则表达式
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A_SH_CODE_PATTERN = re.compile(r"\b(\d{6})(\.(?:SH|SZ))?\b", re.IGNORECASE)
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HK_CODE_PATTERN = re.compile(r"\b(\d{4})\.HK\b", re.IGNORECASE)
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def normalize_stock_code(code: str, explicit_market: str = None) -> str:
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"""规范化股票代码格式.
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Args:
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code: 原始股票代码
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explicit_market: 显式指定的市场，如 'SH' 或 'SZ'
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Returns:
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标准格式的股票代码，如 '000001.SZ'
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"""
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if '.' in code:
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return code.upper()
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if explicit_market:
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return f"{code}.{explicit_market.upper()}"
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# 根据代码规则判断市场
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if code.startswith('6'):
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return f"{code}.SH"
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elif code.startswith(('0', '3')):
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return f"{code}.SZ"
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else:
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return f"{code}.SH" # 默认使用上交所
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# 公司名称变体模式
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COMPANY_SUFFIXES = ["股份", "科技", "公司", "集团", "股份有限公司", "有限公司"]
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class CompanyNameMapper:
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"""Map company names to stock codes with fuzzy matching."""
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def __init__(self):
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self.name_to_code: Dict[str, str] = {} # 完整名称到代码映射
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self.short_names: Dict[str, str] = {} # 简称到代码映射
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self.aliases: Dict[str, str] = {} # 别名到代码映射
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def add_company(self, ts_code: str, full_name: str, short_name: str, aliases: List[str] = None):
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"""Add a company to the mapping.
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Args:
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ts_code: Stock code in format like '000001.SZ'
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full_name: Full registered company name
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short_name: Official short name
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aliases: List of alternative names
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"""
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# 存储完整名称映射
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self.name_to_code[full_name] = ts_code
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# 存储简称映射
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self.short_names[short_name] = ts_code
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# 生成和存储名称变体
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name_variants = self._generate_name_variants(full_name)
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for variant in name_variants:
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if variant not in self.aliases:
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self.aliases[variant] = ts_code
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# 存储额外的别名
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if aliases:
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for alias in aliases:
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if alias not in self.aliases:
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self.aliases[alias] = ts_code
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def _generate_name_variants(self, full_name: str) -> Set[str]:
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"""Generate possible variants of a company name."""
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variants = set()
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# 仅移除整个公司类型后缀
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for suffix in COMPANY_SUFFIXES:
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if full_name.endswith(suffix):
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variant = full_name[:-len(suffix)].strip()
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if len(variant) > 2: # 避免太短的变体
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variants.add(variant)
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break
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return variants
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def find_codes(self, text: str) -> List[Tuple[str, str, str]]:
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"""Find company mentions and corresponding stock codes in text.
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Returns:
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List of tuples (matched_text, stock_code, match_type)
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where match_type is one of 'code', 'full_name', 'short_name', 'alias'
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"""
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matches = []
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# 1. 查找直接的股票代码
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for match in A_SH_CODE_PATTERN.finditer(text):
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code = match.group(1)
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explicit_market = match.group(2)[1:] if match.group(2) else None
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ts_code = normalize_stock_code(code, explicit_market)
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matches.append((match.group(), ts_code, 'code'))
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for match in HK_CODE_PATTERN.finditer(text):
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ts_code = match.group()
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matches.append((match.group(), ts_code, 'code'))
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# 2. 按优先级顺序查找公司名称
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# 完整名称优先级最高
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for name, code in self.name_to_code.items():
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if name in text:
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matches.append((name, code, 'full_name'))
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# 其次是简称
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for name, code in self.short_names.items():
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if name in text:
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matches.append((name, code, 'short_name'))
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# 最后是别名
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for alias, code in self.aliases.items():
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if alias in text:
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matches.append((alias, code, 'alias'))
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return matches
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# 创建全局单例实例
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company_mapper = CompanyNameMapper()
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def initialize_company_mapping(db_connection) -> None:
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"""从数据库加载公司名称映射.
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Args:
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db_connection: SQLite数据库连接
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"""
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cursor = db_connection.cursor()
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cursor.execute("""
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SELECT ts_code, name, short_name
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FROM stock_company
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WHERE name IS NOT NULL
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""")
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for ts_code, name, short_name in cursor.fetchall():
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if name and short_name:
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company_mapper.add_company(ts_code, name, short_name)
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cursor.close()
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