Python implements a method to find a specified file in a directory

This article illustrates how a python implementation can find a specified file in a directory. Share with you for your reference. The specific implementation method is as follows:

1. Fuzzy search

import os

from glob import glob # This module is used 

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)<2  or sys.argv[1].startswith('-'):#sys.argv[0] Is the current path ,1 It starts with the following argument 

        print 'Use: %s <pattern>' % 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. Find the specified file name exactly

import os,optparse

#1: Accurate search 

def search_file(filename, search_path=os.environ['PATH'], pathsep=os.pathsep):#os.pathsep The separator is ';'

    for path in search_path.split(os.pathsep):

        candidate = os.path.join(path, filename)# Primary path 

        if os.path.isfile(candidate):

            yield os.path.abspath(candidate) # The generator makes it easy to control the returned data . You can use .next() Method returns only the next subitem 

def parse_args():# Helpful tips 

    usage = u''' This is a script that looks for files in the folder path ,

 The first parameter is the filename to look for, and the second is the path '''

    parser = optparse.OptionParser(usage)

    help = u' The name of the file to look for '

    parser.add_option('--filename', help=help)#type='int',

    help = u' Find multiple paths to ; separated '

    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"

 
Example: look for.php files starting with a through d in the e: / py and e: / PHPWWW directories
E: p y > Python_cook [a - d] *. PHP: e/p y; E: / PHPWWW
2 match
E: / phpwwwcurl. PHP
E: / phpwwwduoxiancheng. PHP

I hope this article has helped you with your Python programming.