import glob
glob 模块提供了方便的文件模式匹配方法。
例如，找到所有以 .ipynb 结尾的文件名：
glob.glob("*.ipynb")
['11.03 json.ipynb',
'11.01 pprint.ipynb',
'11.02 pickle and cpickle.ipynb',
'11.04 glob.ipynb']
glob 函数支持三种格式的语法：
* 匹配单个或多个字符? 匹配任意单个字符[] 匹配指定范围内的字符，如：[0-9]匹配数字。假设我们要匹配第 09 节所有的 .ipynb 文件：
glob.glob("../09*/*.ipynb")
['../09. theano/09.05 configuration settings and compiling modes.ipynb',
'../09. theano/09.03 gpu on windows.ipynb',
'../09. theano/09.07 loop with scan.ipynb',
'../09. theano/09.13 modern net on mnist.ipynb',
'../09. theano/09.11 net on mnist.ipynb',
'../09. theano/09.09 logistic regression .ipynb',
'../09. theano/09.10 softmax on mnist.ipynb',
'../09. theano/09.01 introduction and installation.ipynb',
'../09. theano/09.02 theano basics.ipynb',
'../09. theano/09.12 random streams.ipynb',
'../09. theano/09.04 graph structures.ipynb',
'../09. theano/09.14 convolutional net on mnist.ipynb',
'../09. theano/09.08 linear regression.ipynb',
'../09. theano/09.15 tensor module.ipynb',
'../09. theano/09.06 conditions in theano.ipynb']
匹配数字开头的文件夹名：
glob.glob("../[0-9]*")
['../04. scipy',
'../02. python essentials',
'../07. interfacing with other languages',
'../11. useful tools',
'../05. advanced python',
'../10. something interesting',
'../03. numpy',
'../06. matplotlib',
'../08. object-oriented programming',
'../01. python tools',
'../09. theano']