Use leading zeros for appended page numbers in extract_images

[willmcclellan]

When extracting pages as images from a document (extract_images) it would be useful if the appended page numbers had leading zeros so they are ordered automatically in the output directory.

If you have more than 9 pages ordering gets lost:

filename_1
filename_10
filename_11
filename_2
etc…

but with leading zeros:

filename_01
filename_02
…

Just a small thing that would help with working with the files after extraction

[lukaszwnek]

agreed, this one would be extremely helpful

[knowtheory]

Nope. sorry guys.

Padding with zeros makes programmatically accessing pages problematic. I shouldn't have to know how many total pages are in a document to know where the first page lives.

If you're concerned about the human aesthetics of using ls or what not, linuxes have a -v option:

~/test$ ls -l
total 0
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_10.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_11.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_12.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_13.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_14.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_15.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_16.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_17.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_18.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:49 test_19.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_1.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:49 test_20.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:49 test_21.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_2.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_3.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_4.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_5.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_6.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_7.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_8.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_9.tmp
~/test$ ls -lv
total 0
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_1.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_2.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_3.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_4.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_5.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_6.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_7.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_8.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_9.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_10.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_11.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_12.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_13.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_14.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_15.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_16.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_17.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:48 test_18.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:49 test_19.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:49 test_20.tmp
-rw-rw-r-- 1 ubuntu ubuntu 0 Apr 5 16:49 test_21.tmp
~/test$