英文识别促销活动

import re

def detect_promotions(text):
    # 定义一些常见的促销关键词和模式
    promotion_patterns = [
        r'\b\d{2}-\d{2}-\d{4}\b',  # 日期格式
        r'\b\d{1,3}%\b',           # 折扣百分比
        r'\b[A-Z]{4}-[A-Z]{4}\b',   # 优惠码格式
        r'\bfree\b',                # 免费
        r'\bdiscount\b',            # 折扣
        r'\bsale\b',                # 销售
    ]
    
    matches = []
    for pattern in promotion_patterns:
        found = re.findall(pattern, text, re.IGNORECASE)
        matches.extend(found)
    
    return matches

# 示例文本
sample_text = "Don't miss our huge sale on Black Friday! Use code SAVE20 for 20% off. Limited time offer until 12/31/2023."

promotions = detect_promotions(sample_text)
print("Detected Promotions:", promotions)