LaundroMat wrote:
> Now, if I look at this script step by step, I don't understand:
> - what is being iterated over (what is being called by "file in
> DirectoryWalker()"?);
as explained in the text above the script, this class emulates a
sequence. it does this by implementing the __getindex__ method:
http://effbot.org/pyref/__getitem__
> - where it gets the "index" value from;
from the call to __getitem__ done by the for-in loop.
> - where the "while 1:"-loop is quitted.
the loop stops when the stack is empty, and pop raises an IndexError
exception.
note that this is an old example; code written for newer versions of
Python would probably use a recursing generator instead (see the source
code for os.walk in the standard library for an example).
</F>
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