python - 将字符串传递给 sub.re 在 Python 中不起作用

Question

这是迄今为止我使用此正则表达式函数的进展:

import os, re

dpath="/root/tree/def/"

fmatch = re.compile(r'\s+''[\[]+''[A-Z]+''[\]]+')
pmatch = fmatch.match('[FLAC]')

def replace(pmatch,df):
    m = re.sub(fmatch,df)
    print (m)



def regex(dpath):
    for df in os.listdir(dpath):
        replace(pmatch, df)

regex (dpath)

首先执行 for 循环并在 (dpath) 中查找文件，然后将目录名称字符串传递给 replace()。但我遇到了缺少参数“字符串”错误:

root@debian:~# python regex3.py
Traceback (most recent call last):
  File "regex3.py", line 18, in <module>
    regex (dpath)
  File "regex3.py", line 16, in regex
    replace(pmatch, df)
  File "regex3.py", line 9, in replace
    m = re.sub(fmatch,df)
TypeError: sub() missing 1 required positional argument: 'string'

Answer 1

您似乎想将正则表达式 \s+[\[]+[A-Z]+[\]]+ 的所有匹配项替换为 [FLAC]

确保执行以下操作:

def replace(pmatch,df):
    m = fmatch.sub('[FLAC]', df)
    print (m)