將參數傳遞給 subprocess.Popen

Question

需要調用grep from python grep 命令： grep -B 5 -A 5 "make.*Error|Error-" file

嘗試了 escaping 的各種組合，正則表達式使其與 subprocess.Popen 一起使用

proc = subprocess.Popen(['grep','-B 5', '-A 5', r'"make.*Error|Error-"', file], stdout=subprocess.PIPE, stderr=subprocess.PIPE)

我是否缺少某種轉義字符以將該正則表達式正確傳遞給 grep？

感謝幫助

Answer 1

將 grep 更改為 egrep 並使用以下格式傳遞正則表達式並且有效！

proc = subprocess.Popen(['egrep','-C 5', r"Error-|make.*Error", 'file.log'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)