How to clone a Python generator object?

If you know you are going to iterate through the whole generator for every usage, you will probably get the best performance by unrolling the generator to a list and using the list multiple times.

walk = list(os.walk('/home'))

You can use itertools.tee():

walk, walk2 = itertools.tee(walk)

Note that this might "need significant extra storage", as the documentation points out.