hachoir-regex 1.0

hachoir-regex application is regex manipulation Python library. Its used by hachoir-subfile for fast pattern matching (find file header).
Examples
Regex creation
>>> from hachoir_core.regex import parse, createString
>>> createString("bike") | createString("motor")
< RegexOr (bike|motor) >
>>> createString("big ") + createString("bike")
< RegexString big bike >
>>> r=parse((cat|horse))
>>> r.minLength(), r.maxLength()
(3, 5)
Optimizations
>>> from hachoir_core.regex import parse, createString
>>> parse("(ma|mb|mc)")
< RegexAnd m[a-c] >
>>> createString("moto") | parse("mot.")
< RegexAnd mot. >
Pattern matching
from hachoir_core.regex import PatternMatching
p = PatternMatching()
p.addString("un", 1)
p.addString("deux", 2)
p.addRegex("(trois|three)", 3)
for start, end, item in p.search("un deux trois"):
print "%r at %s: user=%r" % (item, start, item.user)
find
< StringPattern un > at 0: user=1
< StringPattern deux > at 3: user=2
< RegexPattern t(rois|hree) > at 8: user=3
Enhancements:
- This version supports most regex structures and a lot of regex optimization, but keeps regex order.