shell - python实现把多级目录多个JS文件中包含某字符的字符串提取出来并加上标示存入一个文本文件中。

Question

一个草图：

现实现在文件夹和子文件夹下查找目标字符串，
但不知如何提取包含目标字符的字符串，并写入到新文件中。

#!/usr/bin/env python
#-*- coding:utf-8 -*-
import os, sys
import fnmatch

listonly = False
skipexts = ['.js']
def visitfile(fname,searchkey):
    global fcount,vcount
    try:
        if not listonly:
            if os.path.splitext(fname)[1] in skipexts:
                if open(fname).read().find(searchkey) != -1:
                    print '%s has %s '%(fname,searchkey)
                    fcount+=1
    except: pass
    vcount +=1

def visitor(args,directoryName,filesInDirectory):
    for fname in filesInDirectory:
        # 返回文件所在路径和文件名
        fpath = os.path.join(directoryName,fname)
        if not os.path.isdir(fpath):

            visitfile(fpath,args)

def searcher(startdir,searchkey):
    global fcount,vcount
    fcount = vcount = 0
    os.path.walk(startdir,visitor,searchkey)

if __name__=='__main__':
    # root=raw_input("type root directory:")
    root = '/home/jiangbin/findJS'
    key=raw_input("type key:")
    searcher(root,key)
    print 'Found in %d files,visited %d'%(fcount,vcount)

run

type key:JSQ
/home/jiangbin/findJS/XXX.js has JSQ 
/home/jiangbin/findJS/JSQ.js has JSQ 
Found in 2 files,visited 19

Answer 1

You are almost done...

https://gist.github.com/wusisu/e08ee53513c4410cf9ddd1ba5b0b80f5
I did it for you

----But actually, using shell is ok--------

find . -type f -name "*.js" | xargs grep work_to_be_searched

find . -type f -name "*.js" | xargs grep work_to_be_searched > out.txt

• The type f of find here means that only the file name will be displayed, which ends with .js

• Passed via xargs

• Use grep to search for keywords

• Finally use > to export

Answer 2

If you are using linux, then I suggest you use grep Just fine:

$ ls mydir
a.js  b.js  c.js

$ grep JSQ mydir/*.js
mydir/a.js:abcdefg JSQ abcdefg
mydir/a.js:JSQ abcdefg abcdefg
mydir/a.js:abcdefg abcdefg JSQ
mydir/c.js:abcdefg JSQ abcdefg
mydir/c.js:JSQ abcdefg abcdefg
mydir/c.js:abcdefg abcdefg JSQ

(In the above example, there is something wrong with the display of the first line, it should be like this:grep JSQ mydir/*.js)

You can also import it into a file:

$ grep JSQ mydir/* > results.txt

Then you can organize and compile statistics from results.txt.

If you insist on using Python, I wrote a code that should be more optimized, you can refer to it:

import os
import glob

def search(root, key, ftype='', logname=None):
    ftype = '*.'+ftype if ftype else '*'
    logname = logname or os.devnull
    symbol = os.path.join(root, ftype)
    fnames = glob.glob(symbol)
    vc = len(fnames)
    fc = 0

    with open(logname, 'w') as writer:
        for fname in fnames:
            found = False
            with open(fname) as reader:
                for idx, line in enumerate(reader):
                    line = line.strip()
                    if key in line.split():
                        line = line.replace(key, '**'+key+'**')
                        found = True
                        print('{} -- {}: {}'.format(fname, idx, line), file=writer)
            if found:
                fc = fc + 1
                print('{} has {}'.format(fname, key))

    return vc, fc

search(root, key, ftype='', logname=None)

• will be under root this path

• Look for files with the extension ftype (if not given, all files will be accepted)

• Search inside to see if it contains the keyword key

• If there is a log file for logname，則會輸出關鍵字前後用 '**' highlight, the content is each line containing the keyword

can actually be used like this (search.py):

if __name__=='__main__':
    root = 'mydir'
    key = input("type key: ")
    vc, fc = search(root, key, 'js', logname='results')
    print('Found in {} files, visited {}'.format(fc, vc))

Run:

$ python3 search.py
type key: JSQ
mydir/c.js has JSQ
mydir/a.js has JSQ
Found in 2 files, visited 3

logfile results:

mydir/c.js -- 0: abcdefg **JSQ** abcdefg
mydir/c.js -- 1: **JSQ** abcdefg abcdefg
mydir/c.js -- 2: abcdefg abcdefg **JSQ**
mydir/a.js -- 0: abcdefg **JSQ** abcdefg
mydir/a.js -- 1: **JSQ** abcdefg abcdefg
mydir/a.js -- 2: abcdefg abcdefg **JSQ**

---

Questions I answered: Python-QA