From d56650dc2fe76e0e84c6be1a9e6b1ae045f51921 Mon Sep 17 00:00:00 2001
From: stephenworsley <49274989+stephenworsley@users.noreply.github.com>
Date: Thu, 23 Jul 2020 09:56:52 +0100
Subject: [PATCH] Numpy rounding fix (#3758)

ensure rounding is numpy like (maintains type)
---
 lib/iris/fileformats/pp_load_rules.py | 2 +-
 requirements/core.txt                 | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/iris/fileformats/pp_load_rules.py b/lib/iris/fileformats/pp_load_rules.py
index c0a4081970..b6aacb382f 100644
--- a/lib/iris/fileformats/pp_load_rules.py
+++ b/lib/iris/fileformats/pp_load_rules.py
@@ -627,7 +627,7 @@ def _convert_time_coords(
     def date2hours(t):
         epoch_hours = _epoch_date_hours(epoch_hours_unit, t)
         if t.minute == 0 and t.second == 0:
-            epoch_hours = round(epoch_hours)
+            epoch_hours = np.around(epoch_hours)
         return epoch_hours
 
     def date2year(t_in):
diff --git a/requirements/core.txt b/requirements/core.txt
index 50640751cd..56544d1926 100644
--- a/requirements/core.txt
+++ b/requirements/core.txt
@@ -8,7 +8,7 @@ cartopy>=0.12
 cf-units>=2
 cftime
 dask[array]>=2  #conda: dask>=2
-matplotlib
+matplotlib<3.3
 netcdf4
 numpy>=1.14
 scipy