import os
from glob import glob #用到了這個模塊
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]是當前路徑,1開始是后面的參數(shù)
        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

import os,optparse
#1:精確查找
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)#預(yù)選路徑
        if os.path.isfile(candidate):
            yield os.path.abspath(candidate) #用生成器可以方便控制返回的數(shù)據(jù).可以使用.next()等方法只返回下一個子項
def parse_args():#幫助提示
    usage = u'''這是一個查找文件夾路徑中是否有文件指定文件的腳本,
第一個參數(shù)是要找的文件名，第二個是路徑'''
    parser = optparse.OptionParser(usage)
    help = u'要查找的文件名字'
    parser.add_option('--filename', help=help)#type='int',
    help = u'查找的路徑多個路徑以;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"