BUG: Fix duplication of names in 'numpy.__all__'.

Closes gh-10198.

1 files changed, 9 insertions, 0 deletions

diff --git a/numpy/tests/test__all__.py b/numpy/tests/test__all__.py
new file mode 100644
index 000000000..e44bda3d5
--- /dev/null
+++ b/numpy/tests/test__all__.py
@@ -0,0 +1,9 @@
+
+import collections
+import numpy as np
+
+
+def test_no_duplicates_in_np__all__():
+    # Regression test for gh-10198.
+    dups = {k: v for k, v in collections.Counter(np.__all__).items() if v > 1}
+    assert len(dups) == 0