ammonriley/compactlist

A small python library to compact lists of textual items containing numerical sequences, into an abbreviated format.

CompactList

A small python library to compact lists of textual items containing numerical sequences, into an abbreviated format, such as foo.[0001-0100].jpg or foo.[1-5,8-10].jpg.

Subclass CompactList, overriding pattern with a regex that matches the items in the list. Override _getNumber() to return the numerical index portion of the item's text, and override _getGeneric() to return the remainder of the item's text, with "{0}" substituted for the index portion.

For example:

$ python
Python 2.6.5 (r265:79063, Apr 16 2010, 13:57:41)
[GCC 4.4.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> import compactlist
>>> class FileSequenceList(compactlist.CompactList):
...     pattern = re.compile(r'^(?P<name>\D+\.?)(?P<frame>\d+)(?P<ext>\.\w+)$')
...     def _getNumber(self, m):
...         return m['frame']
...     def _getGeneric(self, m):
...         return m['name']+'{0}'+m['ext']
...
>>> f = FileSequenceList(os.listdir("tmp"))
>>> for s in f.itercompact():
...   print s
...
singleton.0001.exr
otherseq.[0001-0100].exr
foo.txt
somefilesequence.[1-4,6,8-49,60-100].exr