better:优化了表达方式采样
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93
src/express/express_utils.py
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93
src/express/express_utils.py
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import re
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import difflib
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import random
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from datetime import datetime
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from typing import Optional, List, Dict
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from collections import defaultdict
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def filter_message_content(content: Optional[str]) -> str:
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"""
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过滤消息内容,移除回复、@、图片等格式
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Args:
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content: 原始消息内容
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Returns:
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str: 过滤后的内容
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"""
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if not content:
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return ""
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# 移除以[回复开头、]结尾的部分,包括后面的",说:"部分
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content = re.sub(r'\[回复.*?\],说:\s*', '', content)
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# 移除@<...>格式的内容
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content = re.sub(r'@<[^>]*>', '', content)
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# 移除[picid:...]格式的图片ID
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content = re.sub(r'\[picid:[^\]]*\]', '', content)
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# 移除[表情包:...]格式的内容
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content = re.sub(r'\[表情包:[^\]]*\]', '', content)
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return content.strip()
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def calculate_similarity(text1: str, text2: str) -> float:
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"""
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计算两个文本的相似度,返回0-1之间的值
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使用SequenceMatcher计算相似度
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Args:
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text1: 第一个文本
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text2: 第二个文本
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Returns:
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float: 相似度值,范围0-1
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"""
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return difflib.SequenceMatcher(None, text1, text2).ratio()
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def format_create_date(timestamp: float) -> str:
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"""
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将时间戳格式化为可读的日期字符串
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Args:
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timestamp: 时间戳
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Returns:
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str: 格式化后的日期字符串
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"""
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try:
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return datetime.fromtimestamp(timestamp).strftime("%Y-%m-%d %H:%M:%S")
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except (ValueError, OSError):
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return "未知时间"
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def weighted_sample(population: List[Dict], k: int) -> List[Dict]:
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"""
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随机抽样函数
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Args:
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population: 总体数据列表
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k: 需要抽取的数量
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Returns:
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List[Dict]: 抽取的数据列表
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"""
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if not population or k <= 0:
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return []
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if len(population) <= k:
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return population.copy()
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# 使用随机抽样
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selected = []
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population_copy = population.copy()
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for _ in range(k):
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if not population_copy:
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break
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# 随机选择一个元素
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idx = random.randint(0, len(population_copy) - 1)
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selected.append(population_copy.pop(idx))
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return selected
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