From 804144411ec218bfd3b53f565ccce6ffbce52412 Mon Sep 17 00:00:00 2001
From: amitagari <amit.agari@naukri.com>
Date: Tue, 16 Feb 2021 20:08:40 +0530
Subject: [PATCH] empty check for params

---
 pdfminer/pdftypes.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pdfminer/pdftypes.py b/pdfminer/pdftypes.py
index ff742f94..ed290cf0 100644
--- a/pdfminer/pdftypes.py
+++ b/pdfminer/pdftypes.py
@@ -270,7 +270,7 @@ def decode(self):
             else:
                 raise PDFNotImplementedError('Unsupported filter: %r' % f)
             # apply predictors
-            if 'Predictor' in params:
+            if params is not None and  'Predictor' in params:
                 pred = int_value(params['Predictor'])
                 if pred == 1:
                     # no predictor