如何从python字符串中提取日期

import re

def extract_dates_from_string(string):
    pattern = r"\d{4}-\d{2}-\d{2}"  # 匹配形如YYYY-MM-DD格式的日期
    dates = re.findall(pattern, string)
    return dates

# 示例用法
string = "今天是2022-10-01，明天是2022-10-02。"
dates = extract_dates_from_string(string)
print(dates)

['2022-10-01', '2022-10-02']

from datetime import datetime

def extract_dates_from_string(string):
    dates = []
    words = string.split()  # 按空格分割字符串
    for word in words:
        try:
            date = datetime.strptime(word, "%Y-%m-%d")  # 尝试解析日期
            dates.append(date.strftime("%Y-%m-%d"))
        except ValueError:
            pass
    return dates

# 示例用法
string = "今天是2022-10-01，明天是2022-10-02。"
dates = extract_dates_from_string(string)
print(dates)

['2022-10-01', '2022-10-02']