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How to solve a problem?

Schollnick, Benjamin Benjamin.Schollnick at usa.xerox.com
Wed Dec 26 13:16:42 EST 2001 
There's several problems embeded here:

1) How do you tell that the files are the same?
	a) Filename?  - What if you changed the contents but not the name?
	b) Filesize?  - Which one is newer?
	c) Date/Time Stamp - Some transfer methods do not update the 
		date/time stamp.

2) How do you plan on transfering the files?  
	a) Http?
	b) FTP?
	c) Snailmail?
	d) SMB Mount?
	e) NFS Mount?

3) Are these out of a single directory?  Or a directory tree?

To point you part of the way, check the python demos for 
FTPMIRROR.

If you are going to be doing this via FTP then FTP mirror does take
date/time stamp into account.  (That's assuming I'm remembering correctly.)

		- Benjamin

-----Original Message-----
From: A [mailto:printers at sendme.cz]
Sent: Wednesday, December 26, 2001 12:41 PM
To: python-list at python.org; tutor at python.org;
activepython at listserv.ActiveState.com
Subject: How to solve a problem?


Hi,
My program downloads  regularly some files and it takes some 
time so I need to shorten this downloading time. As most of these 
files are the same, many times when the program downloads these 
files, I  would like to  download only those that are not the same or 
are newer. What is the best solution?
Many thanks for help.
Ladislav

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