提取数据框中的一部分字符串

Question

我有一个数据框，该数据框在单列中包含以下行：

__label__JCB_Spare_Part __label__Differential_Housings jcb casting assy differential housing __label__Vibrating_Roller __label__Road_Roller double drum mini roller seat drive model fyl engine nbsp hp aircolled diesel engine wheel size walk speed km climbing capacity drive hydrostatic drive nbsp nbsp __label__Vibrating_Roller __label__Road_Roller double drum mini roller seat drive model fyl engine nbsp hp aircolled diesel engine wheel size walk speed km climbing capacity drive hydrostatic drive nbsp nbsp __label__Crawler_Dozer __label__Bulldozer dozer bulldozer __label__Crawler_Dozer __label__Bulldozer dozer bulldozer

我希望在单独的列中提取所有前缀等于__label__的单词，如下所示： __label__JCB_Spare_Part __label__Differential_Housings __label__Vibrating_Roller __label__Road_Roller __label__Vibrating_Roller __label__Road_Roller __label__Crawler_Dozer __label__Bulldozer __label__Crawler_Dozer __label__Bulldozer

我尝试过的方法： labels = input[0].str.extract(r'(__label__[\w]+)') 但它只会拉出一个第一个标签。

Answer 1

您的代码大部分是正确的；只是您要Google Sheets API has not been used in project ### before or it is disabled.代替

：

findall

Answer 2

您可以尝试以下方法：

import re

str = """
__label__JCB_Spare_Part  __label__Differential_Housings jcb  casting  assy  differential  housing
__label__Vibrating_Roller  __label__Road_Roller double  drum  mini  roller  seat  drive  model  fyl  engine  nbsp  hp  aircolled  diesel  engine  wheel  size  walk  speed  km  climbing  capacity  drive  hydrostatic  drive  nbsp  nbsp
__label__Vibrating_Roller  __label__Road_Roller double  drum  mini  roller  seat  drive  model  fyl  engine  nbsp  hp  aircolled  diesel  engine  wheel  size  walk  speed  km  climbing  capacity  drive  hydrostatic  drive  nbsp  nbsp
__label__Crawler_Dozer  __label__Bulldozer dozer  bulldozer
__label__Crawler_Dozer  __label__Bulldozer dozer  bulldozer
"""

result = re.findall('__label__\w+', str)