Python 字符串处理：识别楼号与门牌号

elif word.isdigit():
    for i, char in enumerate(word):
        if i == 0:
            tag_list.append('B-roadno')
        elif i == len(word) - 1:
            tag_list.append('E-roadno')
        else:
            if word[i+1] == '楼':
                tag_list.append('B-floorno')
            else:
                tag_list.append('I-roadno')
elif word.endswith('号'):
    for i, char in word:
        if i == 0:
            tag_list.append('B-roadno')
        elif i == len(word) - 1:
            tag_list.append('E-roadno')
        else:
            tag_list.append('I-roadno')
    roadno = word