Repository: spyder-ide/spyder

Issue:
Opening Image RGB object in the variable explorer
## Description

### What steps will reproduce the problem?

<!--- You can use Markdown here --->

Double click on the image variable in the variable inspector.

### Traceback
```python-traceback
Traceback (most recent call last):
  File "C:\Users\miltej01\Anaconda3\lib\site-packages\spyder\plugins\variableexplorer\widgets\collectionsdelegate.py", line 187, in createEditor
    editor = ArrayEditor(parent=parent)
UnboundLocalError: local variable 'ArrayEditor' referenced before assignment
```

## Versions

* Spyder version: 5.1.5 
* Python version: 3.8.11
* Qt version: 5.9.7
* PyQt5 version: 5.9.2
* Operating System: Windows 10

### Dependencies

```

# Mandatory:
atomicwrites >=1.2.0          :  1.4.0 (OK)
chardet >=2.0.0               :  4.0.0 (OK)
cloudpickle >=0.5.0           :  2.0.0 (OK)
cookiecutter >=1.6.0          :  1.7.2 (OK)
diff_match_patch >=20181111   :  20200713 (OK)
intervaltree >=3.0.2          :  3.1.0 (OK)
IPython >=7.6.0               :  7.27.0 (OK)
jedi >=0.17.2;<0.19.0         :  0.18.0 (OK)
jsonschema >=3.2.0            :  3.2.0 (OK)
keyring >=17.0.0              :  23.1.0 (OK)
nbconvert >=4.0               :  6.1.0 (OK)
numpydoc >=0.6.0              :  1.1.0 (OK)
paramiko >=2.4.0              :  2.7.2 (OK)
parso >=0.7.0;<0.9.0          :  0.8.2 (OK)
pexpect >=4.4.0               :  4.8.0 (OK)
pickleshare >=0.4             :  0.7.5 (OK)
psutil >=5.3                  :  5.8.0 (OK)
pygments >=2.0                :  2.10.0 (OK)
pylint >=2.5.0;<2.10.0        :  2.9.6 (OK)
pyls_spyder >=0.4.0           :  0.4.0 (OK)
pylsp >=1.2.2;<1.3.0          :  1.2.4 (OK)
pylsp_black >=1.0.0           :  None (OK)
qdarkstyle =3.0.2             :  3.0.2 (OK)
qstylizer >=0.1.10            :  0.1.10 (OK)
qtawesome >=1.0.2             :  1.0.2 (OK)
qtconsole >=5.1.0             :  5.1.1 (OK)
qtpy >=1.5.0                  :  1.10.0 (OK)
rtree >=0.9.7                 :  0.9.7 (OK)
setuptools >=49.6.0           :  58.0.4 (OK)
sphinx >=0.6.6                :  4.2.0 (OK)
spyder_kernels >=2.1.1;<2.2.0 :  2.1.3 (OK)
textdistance >=4.2.0          :  4.2.1 (OK)
three_merge >=0.1.1           :  0.1.1 (OK)
watchdog >=0.10.3             :  2.1.3 (OK)
zmq >=17                      :  22.2.1 (OK)

# Optional:
cython >=0.21                 :  None (OK)
matplotlib >=2.0.0            :  3.4.2 (OK)
numpy >=1.7                   :  1.21.2 (OK)
pandas >=1.1.1                :  1.3.2 (OK)
scipy >=0.17.0                :  1.7.1 (OK)
sympy >=0.7.3                 :  None (OK)
```



Discussion:
Hey @Mister-Dinky, thanks for reporting. This is a bug and we'll fix it in our next version (5.2.0), to be released in a couple of weeks.
Note: this is a regression I introduced in PR #15857.

Resolving patch:
diff --git a/spyder/plugins/variableexplorer/widgets/collectionsdelegate.py b/spyder/plugins/variableexplorer/widgets/collectionsdelegate.py
--- a/spyder/plugins/variableexplorer/widgets/collectionsdelegate.py
+++ b/spyder/plugins/variableexplorer/widgets/collectionsdelegate.py
@@ -15,7 +15,7 @@
 
 # Third party imports
 from qtpy.compat import to_qvariant
-from qtpy.QtCore import QDateTime, Qt, Signal, Slot
+from qtpy.QtCore import QDateTime, Qt, Signal
 from qtpy.QtWidgets import (QAbstractItemDelegate, QDateEdit, QDateTimeEdit,
                             QItemDelegate, QLineEdit, QMessageBox, QTableView)
 from spyder_kernels.utils.lazymodules import (
@@ -32,8 +32,6 @@
 from spyder.plugins.variableexplorer.widgets.dataframeeditor import (
     DataFrameEditor)
 from spyder.plugins.variableexplorer.widgets.texteditor import TextEditor
-from spyder.plugins.variableexplorer.widgets.objectexplorer.attribute_model \
-    import safe_tio_call
 
 
 LARGE_COLLECTION = 1e5
@@ -183,6 +181,10 @@ def createEditor(self, parent, option, index, object_explorer=False):
                 np.ndarray is not FakeObject and
                 PIL.Image is not FakeObject and
                 not object_explorer):
+            # Sometimes the ArrayEditor import above is not seen (don't know
+            # why), so we need to reimport it here.
+            # Fixes spyder-ide/spyder#16731
+            from .arrayeditor import ArrayEditor
             arr = np.array(value)
             editor = ArrayEditor(parent=parent)
             if not editor.setup_and_check(arr, title=key, readonly=readonly):


Test patch: