Merge pull request #11733 from andyfaff/collection

anntzer · tacaswell · commit e435c6383ce8 · 2019-09-04T21:09:58.000-04:00
MAINT: use collections.abc for 3.7
Conflicts:
   lib/matplotlib/cbook/__init__.py

Added try-except block to handle py2 case
diff --git a/lib/matplotlib/cbook/__init__.py b/lib/matplotlib/cbook/__init__.py
@@ -11,6 +11,11 @@
 import six
 from six.moves import xrange, zip
 import collections
+try:
+    import collections.abc as cabc
+except ImportError:
+    import collections as cabc
+
 import contextlib
 import datetime
 import errno
@@ -2293,7 +2298,8 @@ def pts_to_midstep(x, *args):
         The x location of the steps. May be empty.
 
     y1, ..., yp : array
-        y arrays to be turned into steps; all must be the same length as ``x``.
+        y arrays to be turned into steps; all must be the same length as
+        ``x``.
 
     Returns
     -------
@@ -2352,7 +2358,7 @@ def index_of(y):
 
 
 def safe_first_element(obj):
-    if isinstance(obj, collections.Iterator):
+    if isinstance(obj, cabc.Iterator):
         # needed to accept `array.flat` as input.
         # np.flatiter reports as an instance of collections.Iterator
         # but can still be indexed via [].
@@ -2369,7 +2375,8 @@ def safe_first_element(obj):
 
 def sanitize_sequence(data):
     """Converts dictview object to list"""
-    return list(data) if isinstance(data, collections.MappingView) else data
+    return (list(data) if isinstance(data, cabc.MappingView)
+            else data)
 
 
 def normalize_kwargs(kw, alias_mapping=None, required=(), forbidden=(),
