From 93d41768bed1d429e0b0a623ff93a9b618759400 Mon Sep 17 00:00:00 2001
From: Jeff Reback <jeff@reback.net>
Date: Sat, 2 Nov 2019 09:52:45 -0400
Subject: [PATCH] pin black, xref gh-29341

---
 environment.yml      | 2 +-
 requirements-dev.txt | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/environment.yml b/environment.yml
index 163bd08b93c9e..4c96ab815dc90 100644
--- a/environment.yml
+++ b/environment.yml
@@ -16,7 +16,7 @@ dependencies:
   - cython>=0.29.13
 
   # code checks
-  - black
+  - black<=19.3b0
   - cpplint
   - flake8
   - flake8-comprehensions  # used by flake8, linting of unnecessary comprehensions
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 8a9974d393297..7a378cd2f2697 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -3,7 +3,7 @@ python-dateutil>=2.6.1
 pytz
 asv
 cython>=0.29.13
-black
+black<=19.3b0
 cpplint
 flake8
 flake8-comprehensions