From e562f62ff3db701d065f70fb8e7468940acd1d00 Mon Sep 17 00:00:00 2001
From: Shuvam Shah <44120980+shvms@users.noreply.github.com>
Date: Wed, 23 Dec 2020 14:29:49 +0530
Subject: [PATCH] Fixes #2571 (#2572)

---
 nltk/translate/bleu_score.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/nltk/translate/bleu_score.py b/nltk/translate/bleu_score.py
index fb3852bf48..75f42357d2 100644
--- a/nltk/translate/bleu_score.py
+++ b/nltk/translate/bleu_score.py
@@ -541,8 +541,9 @@ def method2(self, p_n, *args, **kwargs):
         In COLING 2004.
         """
         return [
-            Fraction(p_i.numerator + 1, p_i.denominator + 1, _normalize=False)
-            for p_i in p_n
+            Fraction(p_n[i].numerator + 1, p_n[i].denominator + 1, _normalize=False)
+            if i != 0 else p_n[0]
+            for i in range(len(p_n))
         ]
 
     def method3(self, p_n, *args, **kwargs):