#i6 dZddlZddlZddlmZmZmZmZmZeje Z dZ dZ e fdededeefd Zd eed eedefd Ze e fd eedededeeeeffdZd eedeeeefdeefdZy)aDeduplication engine using shingle hashing. Uses n-gram (shingle) fingerprinting for efficient near-duplicate detection without O(n^2) pairwise comparison. Groups entries by section, then compares shingle sets using Jaccard similarity. Part of claw-compactor. License: MIT. N)ListDictAnySetTupleg333333?textkreturncH|j}|s tdhSt||krtdj|hSt }t t||z dzD]3}dj||||z}|j t|5|S)zGenerate a set of k-word shingle hashes from *text*. Each shingle is a hash of *k* consecutive words. Returns a set of integer hashes.  )splithashlenjoinsetrangeadd)r r wordsresultishingles 5/home/crogers2287/claw-compactor/scripts/lib/dedup.py _shinglesrs JJLE Rz 5zA~SXXe_%&&uF 3u:>A% &"((51q5>* 4=!" Mabc`|s|sy|r|syt||z}t||z}|r||z SdS)zCompute Jaccard similarity between two shingle sets. Returns 1.0 for identical sets, 0.0 for disjoint. If both are empty, returns 1.0. g?r)rr intersectionunions rjaccardr%'s@ Q Aq1u:L AJE#(<% 1c1rentries thresholdct|dkrgS|Dcgc]}t||}}t}g}tt|D]}||vr|g}d} d} t|dzt|D]:} | |vrt |||| } | |k\s |j | | | z } | dz } <t|dkDss| r| | z n|} |j |t | dd|j||Scc}w)aFind near-duplicate groups among *entries*. Returns a list of dicts, each with: - indices: list of indices that are near-duplicates - similarity: average Jaccard similarity within the group Uses O(n^2) pairwise comparison with shingle hashing. r!rr)indices similarity)rrrrr%appendroundupdate)r&r'r e shingle_setsusedgroupsr group_indices total_simcountjsimavg_sims rfind_duplicatesr:6s' 7|a -45IaO5L5UD#%F 3w< ' 9   q1uc'l+ ADy,q/<?;Ci$$Q'S    }  !+0i%'iG MM(#GQ/  KK &)', M56sC9r3c|s tSt}|D]5}|d}t|fd}|D]}||k7s |j|7t Dcgc] \}}||vs |c}}Scc}}w)zMerge duplicate groups, keeping the longest entry in each group. Entries not in any group are passed through unchanged. r+c t|S)Nr")idxr&s rz"merge_duplicates..rsC ,=r)key)listrmaxr enumerate) r&r3removedgr+bestr=rr0s ` rmerge_duplicatesrFcs G}G !I,7 => !Cd{ C  ! !$G, A$!Q0@A AA As ! A6.A6)__doc__hashlibloggingtypingrrrrr getLogger__name__logger SHINGLE_SIZESIMILARITY_THRESHOLDstrintrfloatr%r:rFrrrTs..   8 $ #/CC3s8$ 2s3x 2CH 2 2", * #Y** * $sCx. *ZB #YB c3h B #YBr