python实现在目录中查找指定文件的方法

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Release: 2016-06-06 11:20:22
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本文实例讲述了python实现在目录中查找指定文件的方法。分享给大家供大家参考。具体实现方法如下:

1. 模糊查找

代码如下:

import os
from glob import glob #用到了这个模块
def search_file(pattern, search_path=os.environ['PATH'], pathsep=os.pathsep):
    for path in search_path.split(os.pathsep):
        for match in glob(os.path.join(path, pattern)):
            yield match
if __name__ == '__main__':
    import sys
    if len(sys.argv)         print 'Use: %s ' % sys.argv[0]
        sys.exit(1)
    if len(sys.argv)>2:
        matchs = list(search_file(sys.argv[1],sys.argv[2]))
    else:
        matchs = list(search_file(sys.argv[1]))
    print '%d match' % len(matchs)
    for match in matchs:
        print match


2. 指定的文件名精确查找

代码如下:

import os,optparse
#1:精确查找
def search_file(filename, search_path=os.environ['PATH'], pathsep=os.pathsep):#os.pathsep是分隔符';'
    for path in search_path.split(os.pathsep):
        candidate = os.path.join(path, filename)#预选路径
        if os.path.isfile(candidate):
            yield os.path.abspath(candidate) #用生成器可以方便控制返回的数据.可以使用.next()等方法只返回下一个子项
def parse_args():#帮助提示
    usage = u'''这是一个查找文件夹路径中是否有文件指定文件的脚本,
第一个参数是要找的文件名,第二个是路径'''
    parser = optparse.OptionParser(usage)
    help = u'要查找的文件名字'
    parser.add_option('--filename', help=help)#type='int',
    help = u'查找的路径多个路径以;分隔'
    parser.add_option('--path', help=help, default='e:')
    options, args = parser.parse_args()
    return options, args
if __name__ == '__main__':
    options, args = parse_args()
    find_file = list(search_file(args[0], args[1]))
    if find_file:
        for file in find_file:
            print "Found File at %s" % file
    else:
        print "Not Found"


 
例子:在e:/py和e:/phpwww目录下找以a到d开头的.php的文件
E:py>python_cook [a-d]*.php e:/py;e:/phpwww
2 match
e:/phpwwwcurl.php
e:/phpwwwduoxiancheng.php

希望本文所述对大家的Python程序设计有所帮助。

source:php.cn
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