Some documentation

fs/browsewin.py

 #!/usr/bin/env python
+"""
+Creates a window which can be used to browse the contents of a filesystem.
+To use, call the 'browse' method with a filesystem object. Double click a file
+or directory to display its properties.
+
+Requires wxPython.
+
+"""
 
 import wx
 import wx.gizmos

fs/helpers.py

+"""Contains a number of standalone functions for path manipulation."""
+
 from itertools import chain
 
 def isabsolutepath(path):

fs/memoryfs.py

 #!/usr/bin/env python
+"""
+A filesystem that exists only in memory, which obviously makes it very fast.
+
+"""
+
 import os
 import datetime
 from fs import _iteratepath

fs/mountfs.py

@@ -6,6 +6,8 @@ from memoryfs import MemoryFS
 
 class MountFS(FS):
 
+    """A filesystem that delegates to other filesystems."""
+
     class DirMount(object):
         def __init__(self, path, fs):
             self.path = path

fs/osfs.py

@@ -4,6 +4,11 @@ from fs import *
 
 class OSFS(FS):
 
+    """The most basic of filesystems. Simply shadows the underlaying filesytem
+    of the Operating System.
+
+    """
+
     def __init__(self, root_path, thread_syncronize=True):
         FS.__init__(self, thread_syncronize=thread_syncronize)
 

fs/utils.py

+"""Contains a number of high level utility functions for working with FS objects."""
+
 import shutil
 
 def copy_file(src_fs, src_path, dst_fs, dst_path, chunk_size=1024*16):