Python 中文日期轉換

3 min readFeb 9, 2021

關鍵字: Python 日期字串、轉換

如題，如果 input 很單純是 XXX 年 XX 月 XX 日的話，做法其實很簡單…

BUT…

input 可能會有 109.12.31，1091231，109年.12月.31日.，各種亂七八糟的狀況XD，所以在判斷上就要有更多彈性~

import re
from datetime import dateDELIM = u'[.年月日/-]'
CHINESE_JANUARY = u'元月'
ENGLISH_JANUARY = u'1月'
ERA_AD_TO_ROC = 1911def date_convert(input_str):
    if input_str == '':
        return input_str    if re.findall(CHINESE_JANUARY, input_str):
        converted_str = input_str.replace(CHINESE_JANUARY, ENGLISH_JANUARY)
    else:
        converted_str = input_str    date_list = [x for x in re.split(DELIM, converted_str) if x is not '']
    date_list_len = len(date_list)    # The date would be parsed by fixed position 
    # when input date whitout delim or not complete.
    try:
        if date_list_len == 1:
            year = int(date_list[0][:-4])
            month = int(date_list[0][-4:-2])
            day = int(date_list[0][-2:])
        elif date_list_len == 2:
            return "fail: " + input_str
        elif date_list_len > 3:
            return "fail: " + input_str
        else:
            year = int(date_list[0])
            month = int(date_list[1])
            day = int(date_list[2])
    except:
        return "fail: " + input_str    # convert era from A.D. to ROC
    if year > ERA_AD_TO_ROC:
        year -= ERA_AD_TO_ROC    ret_str = ''
    try:
        date(year, month, day)
    except:
        return "fail: " + input_str    try:
        ret_str += ("{:d}".format(int(year)))
        ret_str += ("{:02d}".format(int(month)))
        ret_str += ("{:02d}".format(int(day)))
    except:
        return "fail: " + input_str    return ret_str

Python 中文日期轉換

Written by starzodiac

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