使用Python刪除所有行匹配正則表達式

Question

我試圖刪除我的正則表達式匹配的所有行（正則表達式只是尋找任何有雅虎的行）。每場比賽都在自己的隊伍中，所以不需要多線選項。

這是我迄今爲止...

import re 
inputfile = open('C:\\temp\\Scripts\\remove.txt','w',encoding="utf8") 

inputfile.write(re.sub("\[(.*?)yahoo(.*?)\n","",inputfile)) 

inputfile.close() 

我收到以下錯誤：

回溯（最近通話最後一個）： 線170，在子 回報_compile （圖案，標誌）.SUB（REPL，串，計數） 類型錯誤：預期的字符串或緩衝區

Answer 1

使用，如果要修改原文件fileinput模塊：

import re 
import fileinput 
for line in fileinput.input(r'C:\temp\Scripts\remove.txt', inplace = True): 
    if not re.search(r'\byahoo\b',line): 
     print line, 

Answer 2

你要讀文件嘗試類似：

import re 
inputfile = open('C:\\temp\\Scripts\\remove.txt','w',encoding="utf8") 

inputfile.write(re.sub("\[(.*?)yahoo(.*?)\n","",inputfile.read())) 

file.close() 
outputfile.close() 

Answer 3

這裏是@Ashwini Chaudhary's answer Python 3的變種：

#!/usr/bin/env python3 
import fileinput 
import re 
import sys 

def main(): 
    pattern, filename = sys.argv[1:] # get pattern, filename from command-line 
    matched = re.compile(pattern).search 
    with fileinput.FileInput(filename, inplace=1, backup='.bak') as file: 
     for line in file: 
      if not matched(line): # save lines that do not match 
       print(line, end='') # this goes to filename due to inplace=1 

main() 

它假定locale.getpreferredencoding(False) == 'utf-8'否則可能對非ASCII字符突破。

爲了讓無論是什麼工作，當前區域是或有不同的編碼輸入文件：

#!/usr/bin/env python3 
import os 
import re 
import sys 
from tempfile import NamedTemporaryFile 

def main(): 
    encoding = 'utf-8' 
    pattern, filename = sys.argv[1:] 
    matched = re.compile(pattern).search 
    with open(filename, encoding=encoding) as input_file: 
     with NamedTemporaryFile(mode='w', encoding=encoding, 
           dir=os.path.dirname(filename)) as outfile: 
      for line in input_file: 
       if not matched(line): 
        print(line, end='', file=outfile) 
      outfile.delete = False # don't delete it on closing 
    os.replace(outfile.name, input_file.name) 

main()