您需要更好地了解python语言及其标准库才能翻译表达式
cat“ $ filename”：读取文件
cat"$filename"并将内容转储到stdout
|：管道将上
stdout一条命令重定向，并将其馈送到
stdin下一条命令的
grep“ something”：搜索正则表达式
something纯文本数据文件（如果已指定）或在stdin中，并返回匹配的行。
cut -d’“’-f2：使用特定的定界符分割字符串，并从结果列表中索引/拼接特定字段
相当于Python
cat "$filename" | with open("$filename",'r') as fin: | Read the file Sequentially | for line in fin:| -----------------------------------------------------------------------------------grep 'something' | import re| The python version returns | line = re.findall(r'something', line)[0] | a list of matches. We are only | | interested in the zero group-----------------------------------------------------------------------------------cut -d'"' -f2 | line = line.split('"')[1] | Splits the string and selects | | the second field (which is | | index 1 in python)结合
import rewith open("filename") as origin_file: for line in origin_file: line = re.findall(r'something', line) if line:line = line[0].split('"')[1] print line
