将字符串中的日期替换为特定格式或python脚本将数字日期替换为特定格式

import re

def replace_date_format(string):
    # 正则表达式匹配日期格式
    pattern = r'\d{4}-\d{2}-\d{2}'
    matches = re.findall(pattern, string)
    
    # 替换日期格式
    for match in matches:
        new_date = match.replace('-', '/')
        string = string.replace(match, new_date)
    
    return string

# 示例用法
string = 'Today is 2022-01-01'
new_string = replace_date_format(string)
print(new_string)  # 输出: Today is 2022/01/01

from datetime import datetime

def replace_numeric_date(string):
    # 解析数字日期
    date_format = '%Y%m%d'
    try:
        date = datetime.strptime(string, date_format)
    except ValueError:
        return string
    
    # 替换为特定格式
    new_date = date.strftime('%B %d, %Y')
    return new_date

# 示例用法
string = '20220101'
new_string = replace_numeric_date(string)
print(new_string)  # 输出: January 01, 2022