Regular Expressions

Used a lot in Perl parsing
Not powerful enough to parse a AC line

 >>> import re
 >>> pat = re.compile(r"AC   (\w+);( (\w+);)*$")
 >>> matches = pat.match("AC   P97430; O09081; O09082;")
 >>> matches.groups()
 ('P97430', ' O09082;', 'O09082')
 >>>
Can be used to identify/validate it.
Evalutated a parse tree -- then flattened it.
I want that parse tree!
 
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