
    HiO                        d Z ddlmZ ddlZddlZddlZddlZddlmZ ddl	mZ
mZmZ 	 ddlmZ ddlmZ dZdd
ZddZddZddZddZedk(  r e e             y# e$ r d	ZY 0w xY w)zt
Lightweight similarity utilities: prefer scikit-learn TF-IDF if available, otherwise use pure Python
token cosine.
    )annotationsN)Counter)r   ListTuple)TfidfVectorizer)cosine_similarityTFc                `    t        j                  d| j                               }t        |      S )Nz[a-zA-Z0-9]+)refindalllowerr   )textwordss     9/Volumes/Scratch/Sites/CMassS1/tools/shared/similarity.pytokenizer      s"    JJ

5E5>    c                     rsyt         j                               t        j                               z  }t         fd|D              }t        j                  t        d  j                         D                    }t        j                  t        d j                         D                    }|dk(  s|dk(  ry|||z  z  S )N        c              3  4   K   | ]  }|   |   z    y wN ).0wabs     r   	<genexpr>z!cosine_counter.<locals>.<genexpr>!   s     *6aadQqTk6s   c              3  &   K   | ]	  }||z    y wr   r   r   vs     r   r   z!cosine_counter.<locals>.<genexpr>"        4A!a%   c              3  &   K   | ]	  }||z    y wr   r   r   s     r   r   z!cosine_counter.<locals>.<genexpr>#   r   r    r   )setkeyssummathsqrtvalues)r   r   commondotmag_amag_bs   ``    r   cosine_counterr,      s    A]S]*F
*6*
*CIIc4445EIIc4445EzUaZ%%-  r   c                   t        |       dk  rg S t        rt               }|j                  |       }t	        |      }g }|j
                  d   }t        |      D ]8  }t        |dz   |      D ]$  }|j                  ||t        |||f         f       & : |S | D cg c]  }t        |       }	}g }t        |	      }t        |      D ]<  }t        |dz   |      D ](  }t        |	|   |	|         }
|j                  |||
f       * > |S c c}w )z0Return pairwise similarity scores (i, j, score).   r      )len_HAVE_SKLEARNr   fit_transformr   shaperangeappendfloatr   r,   )texts
vectorizertfidfsimresultsnijttokensscores              r   score_similarityrB   )   s   
5zA~	$&
((/&02IIaLqA1q5!_1eC1I&678 %  #()5ahqk5F),.GFA1Xq1uaA"6!9fQi8ENNAq%=) !  N *s   Dc                @    t        |       }t        d |D        d      S )Nc              3  (   K   | ]
  \  }}}|  y wr   r   )r   _rA   s      r   r   z!max_similarity.<locals>.<genexpr>D   s     0+!Qs   r   )default)rB   max)r7   scoress     r   max_similarityrI   B   s    e$F00#>>r   c                    t        j                  d      } | j                  ddd       | j                         }|j                  st        d       yg }g }|j                  D ]^  }t        j                  |      }|j                         r#	 |j                  |j                  d	
             K|j                  | d       ` t        |      dk  rt        dt        |              yt        |      }|rt        dt        |       d       t        d|ddt        |       d       y# t        $ r }|j                  | d|        Y d }~d }~ww xY w)Nz$Compute max similarity across files.)descriptionpaths*zText files to compare)nargshelpz/ERROR:no_files:no files provided for comparisonr.   zutf-8)encoding:z
:not foundz4ERROR:insufficient_files:need at least 2 files, got zWARN:read_errors:z files skippedzOK:similarity:z.4fz (from z files)r   )argparseArgumentParseradd_argument
parse_argsrL   printpathlibPathis_filer5   	read_text	Exceptionr0   rI   )parserargsr7   errorspath_strpathexcmss           r   _clirc   G   s<   $$1WXF
s1HID::?@EFJJ||H%<<>/T^^W^=> MMTF*-.  5zA~DSZLQR		B!#f+n=>	N2c('#e*W
=>  /auo../s   !D,,	E5EE__main__)r   strreturnCounterType[str])r   rg   r   rg   rf   r6   )r7   	List[str]rf   zList[Tuple[int, int, float]])r7   rh   rf   r6   )rf   int)__doc__
__future__r   rR   r%   rW   r
   collectionsr   typingCounterTyper   r   sklearn.feature_extraction.textr   sklearn.metrics.pairwiser   r1   r[   r   r,   rB   rI   rc   __name__
SystemExitr   r   r   <module>rs      s    #    	  6 6?:M

	!2?
@ z
TV
 g  Ms   A A)(A)