From ac731191e6a2955014b2ac9b7f7e3ddac8d92ee9 Mon Sep 17 00:00:00 2001
From: Antony Lee <anntzer.lee@gmail.com>
Date: Sat, 29 Dec 2018 13:06:44 +0100
Subject: [PATCH] Make examples that load msft.csv robust against locale
 changes.

... which may or may not affect datetime parsing by bytespdate2num.
---
 examples/misc/load_converter.py               | 16 +++++++-------
 examples/misc/plotfile_demo.py                |  1 +
 .../ticks_and_spines/date_index_formatter2.py | 21 ++++++++-----------
 3 files changed, 19 insertions(+), 19 deletions(-)

diff --git a/examples/misc/load_converter.py b/examples/misc/load_converter.py
index 9488972cae87..2c3e03f73b89 100644
--- a/examples/misc/load_converter.py
+++ b/examples/misc/load_converter.py
@@ -4,19 +4,21 @@
 ==============
 
 """
-import numpy as np
+
+import dateutil.parser
+from matplotlib import cbook, dates
 import matplotlib.pyplot as plt
-import matplotlib.cbook as cbook
-from matplotlib.dates import bytespdate2num
+import numpy as np
+
 
 datafile = cbook.get_sample_data('msft.csv', asfileobj=False)
 print('loading', datafile)
 
-dates, closes = np.loadtxt(datafile, delimiter=',',
-                           converters={0: bytespdate2num('%d-%b-%y')},
-                           skiprows=1, usecols=(0, 2), unpack=True)
+data = np.genfromtxt(
+    datafile, delimiter=',', names=True,
+    converters={0: lambda s: dates.date2num(dateutil.parser.parse(s))})
 
 fig, ax = plt.subplots()
-ax.plot_date(dates, closes, '-')
+ax.plot_date(data['Date'], data['High'], '-')
 fig.autofmt_xdate()
 plt.show()
diff --git a/examples/misc/plotfile_demo.py b/examples/misc/plotfile_demo.py
index 94bd1bd9b2bb..d55323b1f7c7 100644
--- a/examples/misc/plotfile_demo.py
+++ b/examples/misc/plotfile_demo.py
@@ -5,6 +5,7 @@
 
 Example use of ``plotfile`` to plot data directly from a file.
 """
+
 import matplotlib.pyplot as plt
 import matplotlib.cbook as cbook
 
diff --git a/examples/ticks_and_spines/date_index_formatter2.py b/examples/ticks_and_spines/date_index_formatter2.py
index 4d9e5750bb5e..c59342e134a7 100644
--- a/examples/ticks_and_spines/date_index_formatter2.py
+++ b/examples/ticks_and_spines/date_index_formatter2.py
@@ -11,19 +11,18 @@
 Formatter to get the appropriate date string for a given index.
 """
 
-
-import numpy as np
-
+import dateutil.parser
+from matplotlib import cbook, dates
 import matplotlib.pyplot as plt
-import matplotlib.cbook as cbook
-from matplotlib.dates import bytespdate2num, num2date
 from matplotlib.ticker import Formatter
+import numpy as np
 
 
 datafile = cbook.get_sample_data('msft.csv', asfileobj=False)
 print('loading %s' % datafile)
-msft_data = np.genfromtxt(datafile, delimiter=',', names=True,
-                          converters={0: bytespdate2num('%d-%b-%y')})[-40:]
+msft_data = np.genfromtxt(
+    datafile, delimiter=',', names=True,
+    converters={0: lambda s: dates.date2num(dateutil.parser.parse(s))})
 
 
 class MyFormatter(Formatter):
@@ -36,13 +35,11 @@ def __call__(self, x, pos=0):
         ind = int(np.round(x))
         if ind >= len(self.dates) or ind < 0:
             return ''
+        return dates.num2date(self.dates[ind]).strftime(self.fmt)
 
-        return num2date(self.dates[ind]).strftime(self.fmt)
-
-formatter = MyFormatter(msft_data['Date'])
 
 fig, ax = plt.subplots()
-ax.xaxis.set_major_formatter(formatter)
-ax.plot(np.arange(len(msft_data)), msft_data['Close'], 'o-')
+ax.xaxis.set_major_formatter(MyFormatter(msft_data['Date']))
+ax.plot(msft_data['Close'], 'o-')
 fig.autofmt_xdate()
 plt.show()