deal with a couple deprecated items (from matplotlib and pandas)

Author: DanielGoldfarb

src/mplfinance/_styles.py

@@ -20,7 +20,14 @@ def _apply_mpfstyle(style):
 
     plt.style.use('default')
 
-    if style['base_mpl_style'] is not None:
+    if style['base_mpl_style'] == 'seaborn-darkgrid':
+        # deal with deprecation of old seaborn-darkgrid:
+        try:
+            plt.style.use('seaborn-v0_8-darkgrid')
+            style['base_mpl_style'] = 'seaborn-v0_8-darkgrid'
+        except:
+            plt.style.use(style['base_mpl_style']) 
+    elif style['base_mpl_style'] is not None:
         plt.style.use(style['base_mpl_style']) 
 
     if style['rc'] is not None:

tests/test_addplot.py

@@ -70,7 +70,7 @@ def percentB_aboveone(percentB,price):
     import numpy as np
     signal   = []
     previous = 2
-    for date,value in percentB.iteritems():
+    for date,value in percentB.items():
         if value > 1 and previous <= 1:
             signal.append(price[date]*1.01)
         else:
@@ -82,7 +82,7 @@ def percentB_belowzero(percentB,price):
     import numpy as np
     signal   = []
     previous = -1.0
-    for date,value in percentB.iteritems():
+    for date,value in percentB.items():
         if value < 0 and previous >= 0:
             signal.append(price[date]*0.99)
         else: