From 60909945459dfc76faace3306d767dd9be56b857 Mon Sep 17 00:00:00 2001
From: Paul Romano <paul.k.romano@gmail.com>
Date: Mon, 29 Jan 2018 15:49:30 -0600
Subject: [PATCH] Make sure IPython<6 is used for Python 2.7

---
 tools/ci/travis-install.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/ci/travis-install.sh b/tools/ci/travis-install.sh
index 6051f03aa9..3ee54af76c 100755
--- a/tools/ci/travis-install.sh
+++ b/tools/ci/travis-install.sh
@@ -10,6 +10,11 @@ pip install numpy cython
 # pytest installed by default -- make sure we get latest
 pip install --upgrade pytest
 
+# IPython stopped supporting Python 2.7 with version 6
+if [[ "$TRAVIS_PYTHON_VERSION" == "2.7" ]]; then
+    pip install "ipython<6"
+fi
+
 # Pandas stopped supporting Python 3.4 with version 0.21
 if [[ "$TRAVIS_PYTHON_VERSION" == "3.4" ]]; then
     pip install pandas==0.20.3