http://pleac.sourceforge.net/pleac_python/directories.html
PLEAC - Programming Language Examples Alike Cookbook
Summary
Following the great Perl Cookbook (by Tom Christiansen & Nathan Torkington, published by O'Reilly; you can freely browse an excerpt of the book here) which presents a suite of common programming problems solved in the Perl language, this project aims to implement the solutions in other programming languages.
If successful, this project may become a primary resource for quick, handy and free reference to solve most common programming problems using various programming languages, and for comparison on ease-of-use and power/efficiency of these languages.
The material, considered as some Documentation, is wholly released under the Gnu Free Documentation License, except the Perl part, which is copyrighted by O'Reilly & Associates yetfreely available.
Please subscribe to the discussion mailing-list if interested in the project.
The FAQ is here. You may also see who talked about Pleac.
Support
前面的Python os.listdir 可以列出 dir 里面的所有文件和目录，但不包括子目录中的内容。os.walk 可以遍历下面的所有目录，包括子目录。
os.listdir只返回一层的文件夹和文件名