From 6bb2a66d590d110546afea2c8772e8cef978c0ed Mon Sep 17 00:00:00 2001
From: SebastianoF <sebastiano.ferraris@gmail.com>
Date: Fri, 4 Oct 2019 13:05:58 +0100
Subject: [PATCH] black only for a single version test

---
 .travis.yml | 1 +
 setup.py    | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index 700e894d032..cbcab61f58a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,6 +13,7 @@ python:
 install:
   - pip install codecov
   - pip install .[dev]
+  - if [[ $TRAVIS_PYTHON_VERSION == 3.6 ]]; then pip install -U black; fi
 script:
   - export PYTHONPATH=$PYTHONPATH:$(pwd)
   # * E501 - line length limit
diff --git a/setup.py b/setup.py
index 11f0951cec4..f0fcfb29e85 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@
 requires = ["click", "cookiecutter", "networkx", "numpy", "pandas", "tornado", "tqdm"]
 
 extras_require = {
-    "dev": ["coverage", "flake8", "pytest >= 3.6", "pytest-cov", "sphinx", "black"],
+    "dev": ["coverage", "flake8", "pytest >= 3.6", "pytest-cov", "sphinx"],
     "docs": ["sphinx"],
 }