将句子中年份的小写数字改为阿拉伯数字

import re

m0 = "在一九四九年新华夏创造比一九九零年低百分之五点二人一九九六年打败萨军,博得本质独力"

pattrern1 = '[零一二三四五六七八九]{4,}'

pattrern2 = '[〇一二三四五六七八九零壹贰叁肆伍陆柒捌玖貮两]{4,}'

time1 = re.findall(pattrern1,m0)#变化数字

CN_NUM = {

'〇': 0, '一': 1, '二': 2, '三': 3, '四': 4, '五': 5, '六': 6, '七': 7, '八': 8, '九': 9, '零': 0,

'壹': 1, '贰': 2, '叁': 3, '肆': 4, '伍': 5, '陆': 6, '柒': 7, '捌': 8, '玖': 9, '貮': 2, '两': 2,}

for i in range(len(time1)):

new_str = ''

for j in time1[i]:

new_str += str(CN_NUM[j])

time1[i] = new_str

time1