python - Scrapy正则表达式怎么去掉空格和换行符？

Answer 1

You can use the re.sub function to perform regular replacement,
sub(pattern, repl, string, count=0)

• First parameter: Rule

• The second parameter: the replaced string

• The third parameter: string

• The fourth parameter: the number of replacements. Defaults to 0, meaning every match is replaced

>>> a="\t\t\n 123"
>>> a
'\t\t\n 123'
>>> b = re.sub(r'\s+','', a) #\s   匹配任意的空白符
>>> b
'123'