ENH: Always show dtype fields in the array repr, even for non-void

numpy/core/arrayprint.py

@@ -1254,6 +1254,11 @@ def dtype_is_implied(dtype):
     dtype = np.dtype(dtype)
     if _format_options['legacy'] == '1.13' and dtype.type == bool_:
         return False
+
+    # not just void types can be structured, and names are not part of the repr
+    if dtype.names is not None:
+        return False
+
     return dtype.type in _typelessdata
 
 
@@ -1266,12 +1271,12 @@ def dtype_short_repr(dtype):
     >>> from numpy import *
     >>> assert eval(dtype_short_repr(dt)) == dt
     """
-    # handle these separately so they don't give garbage like str256
-    if issubclass(dtype.type, flexible):
-        if dtype.names is not None:
-            return "%s" % str(dtype)
-        else:
-            return "'%s'" % str(dtype)
+    if dtype.names is not None:
+        # structured dtypes give a list or tuple repr
+        return str(dtype)
+    elif issubclass(dtype.type, flexible):
+        # handle these separately so they don't give garbage like str256
+        return "'%s'" % str(dtype)
 
     typename = dtype.name
     # quote typenames which can't be represented as python variable names

numpy/core/tests/test_multiarray.py

@@ -485,7 +485,8 @@ def test_structured_non_void(self):
 
         # gh-9821
         arr_int = np.zeros(4, dt_int)
-        assert_equal(repr(arr_int), "array([0, 0, 0, 0])")
+        assert_equal(repr(arr_int),
+            "array([0, 0, 0, 0], dtype=(numpy.int32, [('a', '<i2'), ('b', '<i2')]))")
 
 
 class TestZeroRank(object):