python 正则匹配数字

a = '代34020033902345优财鑫源正华一号私募证券投资基金募集专户收款'
if '代' in a:
    regular = '代[0-9]+'
    matching = re.search(regular,a)
    rep = matching.group(0).replace('代', '')
    print(rep)

运行结果为：