fix object array in emcee code (#2239)

* fix object array * Update CHANGELOG.md * Update CHANGELOG.md
arviz-devs · May 7, 2023 · 5cdcc6a · 5cdcc6a
1 parent d8a0ef2
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -8,6 +8,8 @@
 
 ### Maintenance and fixes
 
+- Fixes for creating numpy object array ([2233](https://github.com/arviz-devs/arviz/pull/2233) and [2239](https://github.com/arviz-devs/arviz/pull/2239))
+
 ### Deprecation
 
 ### Documentation

diff --git a/arviz/data/io_emcee.py b/arviz/data/io_emcee.py
@@ -191,7 +191,7 @@ def blobs_to_dict(self):
             if int(self.emcee.__version__[0]) >= 3:
                 blobs = self.sampler.get_blobs()
             else:
-                blobs = np.array(self.sampler.blobs)
+                blobs = np.array(self.sampler.blobs, dtype=object)
             if (blobs is None or blobs.size == 0) and self.blob_names:
                 raise ValueError("No blobs in sampler, blob_names must be None")
             if len(blobs.shape) == 2: