Bug#918206: Pandas new version (not?)

[Rebecca N. Palmer]

This builds (including build-time tests; haven't tried the autopkgtest).

Description: Fix np.array @ DataFrame matrix multiplication

Author: jbrockmendel
Origin: upstream 
https://github.com/pandas-dev/pandas/commit/ad2a14f4bec8a004b2972c12f12ed3e4ce37ff52
Bug-Debian: https://bugs.debian.org/918206
Forwarded: not-needed

--- a/pandas/core/generic.py
+++ b/pandas/core/generic.py
@@ -1602,6 +1602,7 @@ class NDFrame(PandasObject, SelectionMix
      # 
----------------------------------------------------------------------
      # Array Interface

+    __array_priority__ = 1000
      def __array__(self, dtype=None):
          return com._values_from_object(self)

--- a/pandas/tests/frame/test_analytics.py
+++ b/pandas/tests/frame/test_analytics.py
@@ -2283,8 +2283,11 @@ class TestDataFrameAnalytics(TestData):

          # np.array @ DataFrame
          result = operator.matmul(a.values, b)
+        assert isinstance(result, DataFrame)
+        assert result.columns.equals(b.columns)
+        assert result.index.equals(pd.Index(range(3)))
          expected = np.dot(a.values, b.values)
-        tm.assert_almost_equal(result, expected)
+        tm.assert_almost_equal(result.values, expected)

          # nested list @ DataFrame (__rmatmul__)
          result = operator.matmul(a.values.tolist(), b)