Paddy wrote: > Andre Meyer wrote: > > > Hi all > > > > os.walk() is a nice generator for performing actions on all files in a > > directory and subdirectories. However, how can one use os.walk() for walking > > through two hierarchies at once? I want to synchronise two directories (just > > backup for now), but cannot see how I can traverse a second one. I do this > > now with os.listdir() recursively, which works fine, but I am afraid that > > recursion can become inefficient for large hierarchies. > > > > thanks for your help > > André > > Walk each tree individually gathering file names relative to the head > of the tree and modification data. > > compare the two sets of data to generate: > 1. A list of what needs to be copied from the original to the copy. > 2. A list of what needs to be copied from the copy to the original > > Do the copying. > > |You might want to show the user what needs to be done and give them > the option of aborting after generating the copy lists. > > - Paddy. P.S. If you are on a Unix type system you can use tar to do the copying as you can easily compress the data if it needs to go over a sow link, and tar will take care of creating any needed directories in the destination if you create new directories as well as new files. - Paddy.
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