Question

我整理了一个使用mac程序Patterns的正则表达式，当我在python脚本中使用代码时，我无法获得对文件名所做的更改。我知道您需要将re.sub的输出分配给新字符串，这是一个常见错误。我做到了，但我仍然无法得到正确的结果。

这是我的代码，其中给定的文件名作为输入：

real.time.With.bill.maher.JUST.OVERTIME.2014.01.31.WEB-DL.Shadoe

real time with bill maher 2014 01 24 hdtv x264-2hd.mp4

Real Time With Bill Maher 2014.02.07.hdtv.x264-2hd.mp4

import re
import os

path = "/Users/USERNAME/Movies"
pattern = "(real[. ]time[. ]with[. ]bill[. ]maher[. ])"
replacement = "Real Time with Bill Maher "

def renamer(path, pattern, replacement):
    for dirpath,_,file in os.walk(path):
        for oldname in file:
            if re.search(pattern, oldname, re.I):
                newname = re.sub(pattern, replacement, oldname)
                newpath = os.path.join(dirpath, newname)
                oldpath = dirpath + "/" + oldname
                print newpath + " < new"
                print oldpath
                os.rename(oldpath, newpath)

renamer(path, pattern, replacement)

Answer 1

代码在re.I调用中缺少re.sub标记：

>>> pattern = "(real[. ]time[. ]with[. ]bill[. ]maher[. ])"
>>> replacement = "Real Time with Bill Maher "
>>> re.sub(pattern, replacement, 'real.time.With.bill.maher.JUST.OVERTIME.2014.01.31.WEB-DL.Shadoe')
'real.time.With.bill.maher.JUST.OVERTIME.2014.01.31.WEB-DL.Shadoe'
>>> re.sub(pattern, replacement, 'real.time.With.bill.maher.JUST.OVERTIME.2014.01.31.WEB-DL.Shadoe', flags=re.I)
'Real Time with Bill Maher JUST.OVERTIME.2014.01.31.WEB-DL.Shadoe'

您应该将flags指定为关键字参数，否则将其识别为count（替换计数）参数。

如何使用re.sub实际替换文件名？

1 个答案: