python_glob模块的使用

glob是Python自己带的一个文件操作相关模块，用它可以查找符合自己目的的文件，就类似于Windows下的文件搜索，支持通配符操作，*,?,[]这三个通配符，*代表0个或多个字符，?代表一个字符，[]匹配指定范围内的字符，如[0-9]匹配数字。

它的主要方法就是glob,该方法返回所有匹配的文件路径列表，该方法需要一个参数用来指定匹配的路径字符串（本字符串可以为绝对路径也可以为相对路径），其返回的文件名只包括当前目录里的文件名，不包括子文件夹里的文件。

python手机中的介绍：

The glob module finds all the pathnames matching a specified pattern according to the rules used by the Unix shell. No tilde expansion is done, but *,?, and character ranges expressed with [] will be correctly matched. This is done by using the os.listdir() and fnmatch.fnmatch() functions in concert, and not by actually invoking a subshell. (For tilde and shell variable expansion, use os.path.expanduser() and os.path.expandvars().)

glob.glob(pathname)　#返回列表

Return a possibly-empty list of path names that match pathname, which must be a string containing a path specification. pathname can be either absolute (like /usr/src/Python-1.5/Makefile) or relative (like ../../Tools/*/*.gif), and can contain shell-style wildcards. Broken symlinks are included in the results (as in the shell).

glob.iglob(pathname)　＃返回迭代器

Return an iterator which yields the same values as glob() without actually storing them all simultaneously.

New in version 2.5.

For example, consider a directory containing only the following files: 1.gif, 2.txt, and card.gif. glob() will produce the following results. Notice how any leading components of the path are preserved.

>>> import glob
>>> glob.glob('./[0-9].*')
['./1.gif', './2.txt']
>>> glob.glob('*.gif')
['1.gif', 'card.gif']
>>> glob.glob('?.gif')
['1.gif']

上代码：

import glob
fileList = glob.glob(r'c:*.txt')
print fileList
for file_name in fileList:
    print file_name

print '*'*40
fileGen = glob.iglob(r'c:*.txt')
print fileGen
for filename in fileGen:
    print filename

结果：

['c:\1.txt', 'c:\adf.txt', 'c:\baidu.txt', 'c:\resultURL.txt']
c:1.txt
c:adf.txt
c:aidu.txt
c:
esultURL.txt
****************************************
<generator object iglob at 0x01DC1E90>
c:1.txt
c:adf.txt
c:aidu.txt
c:
esultURL.txt