python 年月日日期转换为年月 python 日期转换为数字

import re


def number_C2E(ChineseNumber):
    """中文数字转整形"""
    map = dict(〇=0, 一=1, 二=2, 三=3, 四=4, 五=5, 六=6, 七=7, 八=8, 九=9, 十=10)
    size = len(ChineseNumber)
    if size == 0 : return 0
    if size < 2:
        return map[ChineseNumber]

    ans = 0
    continue_flag = False  # 连续进两个的标志位
    for i in range(size):
        if continue_flag:
            continue_flag = False
            continue

        if i+1 < size and ChineseNumber[i+1] == '十':
            ans += map[ChineseNumber[i]]*10
            continue_flag = True
            continue
        ans += map[ChineseNumber[i]]
    return ans


def ChineseDate2EnglishDate(ChineseDate):
    map = dict(〇=0, 一=1, 二=2, 三=3, 四=4, 五=5, 六=6, 七=7, 八=8, 九=9)
    r = re.search(r'(.*)年(.*)月(.*)日', ChineseDate)
    year = r.group(1)
    month = r.group(2)
    day = r.group(3)
    for s, n in map.items():
        year = year.replace(s, str(n))
    month = number_C2E(month)  # 中文转整型
    day = number_C2E(day)

    # 整型转字符串
    if month < 10:
        month = "0" + str(month)
    else:
        month = str(month)
    if day < 10:
        day = "0" + str(day)
    else:
        day = str(day)
    return year+'-'+month+'-'+day


print(ChineseDate2EnglishDate("二〇二二年三月三十一日"))

输出：

文中用到了正则表达式