请问python代码中出现这个的原因是什么

import pandas as pd
hair_dryer = pd.read_csv('C:\\Users\\gys20\\Desktop\\hair_dryer.csv')
microwave=pd.read_csv('C:\\Users\\gys20\\Desktop\\microwave.csv')
pacifier=pd.read_csv('C:\\Users\\gys20\\Desktop\\pacifier.csv')
def washer(dataset):
   new_dataset = dataset.drop (['marketplace ', 'product_category'], axis =1)
   new_dataset .loc[ new_dataset ['vine '] == 'n', 'vine '] = 'N'
   new_dataset .loc[ new_dataset ['vine '] == 'y', 'vine '] = 'Y'
   new_dataset .loc[ new_dataset ['verified_purchase '] == 'n', 'verified_purchase '] = 'N'
   new_dataset .loc[ new_dataset ['verified_purchase '] == 'y', 'verified_purchase '] = 'Y'

transfer = [('', '\'''), ('', '\''), ('', '"'), ('', '"'), ('', ','), ('', '.'), ('', '!'), ('', '...'), ('', '-'), ('', '-')]
accept = '[^a-zA -Z0 -9_ !? ,.\ '" '+ -=;() \[\] < >*#~&$^@%/|\\\\]'

##用我这个
transfer = [('', '\'\''), ('', '\''), ('', '"'), ('', '"'), ('', ','), ('', '.'), ('', '!'), ('', '...'), ('', '-'), ('', '-')]

看看有没有中文字符还是其他的字符

('', '\''') 这个地方只有一个转义，单引号没结束。('', '\'\'') 这样就可以了

transfer = [('', '\'\''), ('', '\''), ('', '"'), ('', '"'), ('', ','), ('', '.'), ('', '!'), ('', '...'), ('', '-'), ('', '-')]

你换 PyCharm，看得更清楚。

@bj_0163_bj 还是不行

你这个地方没加转义

单引号作为字符每个都要转义

那个容易，下面的 regex 要他本人才明白。

例子：

r_validation = re.compile(r'''
    ^(?:    # Capture from the start.
      # Below is the same regex as above, but condensed.
      # One tiny modification is that it allows empty values
      # The first plus is replaced by an asterisk.
      \s*([^,"']*?|"(?:[^"\\]|\\.)*"|'(?:[^'\\]|\\.)*')\s*(?:,|$)
    )*$    # And don't stop until the end.
    ''', re.VERBOSE)

transfer = [('', '\''),
            ('', '\''),
            ('', '"'),
            ('', '"'),
            ('', ','),
            ('', '.'),
            ('', '!'),
            ('', '...'),
            ('', '-'),
            ('', '-')]
#        '[^a-zA -Z0 -9_ !? ,.\ '" '+ -=;() \[\] < >*#~&$^@%/|\\\\]'


accept = '[^a-zA -Z0 -9_ !? ,.\' " + -=;() [] < >*#~&$^@%/|'

　　换行符“\” 后面存在空格。当换行符后面存在空格时，程序就会报错。