linux下搜索文件的python方法

#!/usr/bin/env python
import os, sys, glob, re

if sys.hexversion < 0x02040000:
        print >> sys.stderr, 'Your python version is too old (%s)' % \
                                                        (sys.version.split()[0])
        print >> sys.stderr, 'You need at least Python 2.4'
        sys.exit(1)

PPATH = False

def search_all_files(pattern, search_path, pathsep=os.pathsep):
    for path in search_path.split(pathsep):
        '''
        candidate = os.path.join(path, filename)
        if os.path.isfile(candidate):
            return os.path.abspath(candidate)
        '''
        for match in glob.glob(os.path.join(path, pattern)):
            yield match

def print_file(pattern, path=None):
    if PPATH:
    p = path.split(' ')
    path = lambda p : os.pathsep.join(p)
    matches = list(search_all_files(pattern, path(p)))
    if matches:
            for match in matches:
                print match
        else:
        print "Not find like '%s' !" % pattern
        sys.exit(1)
    else:
        matches = list(search_all_files(pattern, os.environ['PATH']))
    if matches:
        for match in matches:
        print match
    else:
        print "Not find like '%s' !" % pattern
        sys.exit(1)

def deep_search(fpattern, path):
    pathlist = path.split(' ')
    finded = False
    for p in pathlist:
        if os.path.exists(p):
            for dirpath, dirnames, filenames in os.walk(p):
                for file in filenames:
                    fullpath = os.path.join(dirpath, file)
                    if re.search(fpattern, fullpath):
                        print fullpath
                        finded = True
                    else:
                        continue
        else:
            print "[*]Path %s don't exit !" % p
            sys.exit(1)
    if not finded:
        print "Don't find like %s !" % fpattern

if __name__ == '__main__':
    if '-p' in sys.argv:
    PPATH = True
    if '-d' not in sys.argv:
        if len(sys.argv) != 4 or sys.argv[1].startswith('-'):
                print "Usage %s <pattern> -p 'path1 path2 path3....' use escape to split pathname" % sys.argv[0]
        else:
                print_file(sys.argv[1], sys.argv[3])
    elif sys.argv[4] == '-d':
        deep_search(sys.argv[1], sys.argv[3])
    else:
    if len(sys.argv) != 2 or sys.argv[1].startswith('-'):
        print "Usage %s <pattern> " % sys.argv[0]
        sys.exit(1)
        else:
            print_file(sys.argv[1])