From f0e05888337ea3b82f2ed475614952cd11edc724 Mon Sep 17 00:00:00 2001
From: Matthew Honnibal <honnibal@gmail.com>
Date: Sat, 7 Feb 2015 08:44:42 -0500
Subject: [PATCH] * Fill L2 norm attribute on LexemeC struct

---
 spacy/vocab.pyx | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/spacy/vocab.pyx b/spacy/vocab.pyx
index 468a2acef..8ed9805a0 100644
--- a/spacy/vocab.pyx
+++ b/spacy/vocab.pyx
@@ -5,6 +5,7 @@ from libc.stdint cimport int32_t
 import bz2
 from os import path
 import codecs
+import math
 
 from .lexeme cimport EMPTY_LEXEME
 from .lexeme cimport set_lex_struct_props
@@ -205,6 +206,9 @@ cdef class Vocab:
             lex = <LexemeC*>self.lexemes[i]
             if lex.lower < vectors.size():
                 lex.repvec = vectors[lex.lower]
+                for i in range(vec_len):
+                    lex.l2_norm += (lex.repvec[i] * lex.repvec[i])
+                lex.l2_norm = math.sqrt(lex.l2_norm)
             else:
                 lex.repvec = EMPTY_VEC