ó –ÛtSc@sgddlZddlZd„Zdd„Zd„Zdd„Zd„Zddd „Zd „Z dS( iÿÿÿÿNcCsDt||ƒ|r@|ddjdƒ|ddjdƒndS(NitFt__BOS__iÿÿÿÿt__EOS__(tapply_templatestappend(tXt templates((si/home/yorickpeterse/Private/Projects/opener/opinion-detector-base/core/python-scripts/scripts/crfutils.pytfeature_extractors c Cs‚t|dƒ}t|dƒ}|jdƒ}x:t|||ƒD]&} t| |ƒt|| d|ƒq@W|jƒ|jƒdS(Ntrtwt ty(topentsplittreaditerRtoutput_featurestclose( t inputfilet outputfiletfieldst separatorRtpossible_classestfitfoRR((si/home/yorickpeterse/Private/Projects/opener/opinion-detector-base/core/python-scripts/scripts/crfutils.pytextract_features_to_crfs  c Cs,d}x|D]}djg|D]\}}d||f^q ƒ}xÜtt|ƒƒD]È}g}xv|D]n\}} || } | tt|ƒƒkr£g}Pn|| |} | dkrk| dkrk|j| ƒqkqkW|rXt|ƒdkrX||djd|dj|ƒfƒqXqXWq WdS( s Generate features for an item sequence by applying feature templates. A feature template consists of a tuple of (name, offset) pairs, where name and offset specify a field name and offset from which the template extracts a feature value. Generated features are stored in the 'F' field of each item in the sequence. @type X: list of mapping objects @param X: The item sequence. @type template: tuple of (str, int) @param template: The feature template. tt|s%s[%d]t-iRs%s=%sN(tjointrangetlenR( RRtnamettemplatetftotttvaluestfieldtoffsettptvalue((si/home/yorickpeterse/Private/Projects/opener/opinion-detector-base/core/python-scripts/scripts/crfutils.pyRs 2 R ccsÐg}xÃ|D]»}|jdƒ}|s6|Vg}q |j|ƒ}t|ƒt|ƒkrtdt|ƒ||fƒ‚nigd6}x,tt|ƒƒD]}|||||s   & #  J