每个日期的文本计数python

import re
from datetime import datetime

def count_dates(text):
    # 定义日期格式的正则表达式
    date_pattern = r'\d{4}-\d{2}-\d{2}'
    
    # 使用正则表达式匹配文本中的日期
    dates = re.findall(date_pattern, text)
    
    # 统计每个日期出现的次数
    date_counts = {}
    for date in dates:
        if date in date_counts:
            date_counts[date] += 1
        else:
            date_counts[date] = 1
    
    return date_counts

text = "今天是2022-01-01，明天是2022-01-02，后天是2022-01-03。"
counts = count_dates(text)
for date, count in counts.items():
    print(f"{date}: {count}")

2022-01-01: 1
2022-01-02: 1
2022-01-03: 1