From 61a9e8663a3fb36ce4afbe26431e74e66621e175 Mon Sep 17 00:00:00 2001
From: Muriithi Frederick Muriuki
Date: Sun, 18 Mar 2018 08:51:55 +0300
Subject: Check that key exists before using it

* Ensure the key exists in the json object/dictionary, before trying to
  use it to retrieve a value.
---
 wqflask/wqflask/marker_regression/marker_regression.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wqflask/wqflask/marker_regression/marker_regression.py b/wqflask/wqflask/marker_regression/marker_regression.py
index 087b95b4..c189fb96 100644
--- a/wqflask/wqflask/marker_regression/marker_regression.py
+++ b/wqflask/wqflask/marker_regression/marker_regression.py
@@ -114,7 +114,7 @@ class MarkerRegression(object):
         self.num_perm = 0
         self.perm_output = []
         self.bootstrap_results = []
-        self.covariates = start_vars['covariates']
+        self.covariates = start_vars['covariates'] if "covariates" in start_vars else None
 
         #ZS: This is passed to GN1 code for single chr mapping
         self.selected_chr = -1
-- 
cgit v1.2.3