On 19/07/2012 20:06, larry.mart...@gmail.com wrote:
On Jul 19, 1:02 pm, "Prasad, Ramit" <ramit.pra...@jpmorgan.com> wrote:
> > I am making the assumption that you intend to collapse the directory
> > tree and store each file in the same directory, otherwise I can't think
> > of why you need to do this.
> Hi Simon, thanks for the reply. It's not quite this - what I am doing
> is creating a zip file with relative path names, and if there are
> duplicate files the parts of the path that are not be carried over
> need to get prepended to the file names to make then unique,
Depending on the file system of the client, you can hit file name
length limits. I would think it would be better to just create
the full structure in the zip.
Just something to keep in mind, especially if you see funky behavior.
Thanks, but it's not what the client wants.
Here's another solution, not using itertools:
from collections import defaultdict
from os.path import basename, dirname
from time import strftime, strptime
# Starting with the original paths
paths = [
"/dir0/dir1/dir2/dir3/qwer/09Jan12/dir6/file3",
"/dir0/dir1/dir2/dir3/abcd/08Jan12/dir6/file1",
"/dir0/dir1/dir2/dir3/abcd/08Jan12/dir6/file2",
"/dir0/dir1/dir2/dir3/xyz/08Jan12/dir6/file1",
"/dir0/dir1/dir2/dir3/qwer/07Jan12/dir6/file3",
]
def make_dir5_key(path):
date = strptime(path.split("/")[6], "%d%b%y")
return strftime("%y%b%d", date)
# Collect the paths into a dict keyed by the basename
files = defaultdict(list)
for path in paths:
files[basename(path)].append(path)
# Process a list of paths if there's more than one entry
renaming = []
for name, entries in files.items():
if len(entries) > 1:
# Collect the paths in each subgroup into a dict keyed by dir4
subgroup = defaultdict(list)
for path in entries:
subgroup[path.split("/")[5]].append(path)
for dir4, subentries in subgroup.items():
# Sort the subentries by dir5 (date)
subentries.sort(key=make_dir5_key)
if len(subentries) > 1:
for index, path in enumerate(subentries):
renaming.append((path,
"{}/{}_{:02}_{}".format(dirname(path), dir4, index, name)))
else:
path = subentries[0]
renaming.append((path, "{}/{}_{}".format(dirname(path),
dir4, name)))
else:
path = entries[0]
for old_path, new_path in renaming:
print("Rename {!r} to {!r}".format(old_path, new_path))
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