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-rw-r--r--numpy/core/_internal.py7
1 files changed, 5 insertions, 2 deletions
diff --git a/numpy/core/_internal.py b/numpy/core/_internal.py
index 99e64d475..e46e1441a 100644
--- a/numpy/core/_internal.py
+++ b/numpy/core/_internal.py
@@ -90,8 +90,11 @@ def _array_descr(descriptor):
else:
new = descriptor.metadata.copy()
# Eliminate any key related to internal implementation
- _ = new.pop(METADATA_DTSTR, None)
- return (descriptor.str, new)
+ new.pop(METADATA_DTSTR, None)
+ if new:
+ return (descriptor.str, new)
+ else:
+ return descriptor.str
else:
return (_array_descr(subdtype[0]), subdtype[1])