meaning of class FileInfo(UserDict)

from UserDict import UserDict

class FileInfo(UserDict): 

In Python, the ancestor of a class is simply listed in parentheses immediately after the class name. So the FileInfo class is inherited from the UserDict class

Python editor: Wingware's Python IDE

http://www.wingware.com/
Wingware's Python IDE

not good:  iep,  the Interactive Editor for Python

How to suppress the carriage return in python

always open your files in binary mode ("rb" or "wb")