Allow examples/neurons.py to run successfully when neuromorpho is down (

#366)

* Added try-except in examples/neurons.py to prevent test failure when neuromorpho is down

* Fix for screenshot test

* Reverted reset_cam dynamic setting, add new screenshots to data folder

* Added silhouette to the TH in validation screenshots

* Generate screenshots with the same settings as the ones set by tests/__init__.py

* Generate screenshots using the test method

* Reset settings at the end of examples/settings.py script

examples/neurons.py

@@ -1,6 +1,6 @@
 from pathlib import Path
-from importlib.resources import files
 
+import requests.exceptions
 from morphapi.api.mouselight import MouseLightAPI
 from myterial import orange
 from rich import print
@@ -19,14 +19,17 @@
 scene.add(Neuron(neuron_file))
 
 # Download neurons data with morphapi
-mlapi = MouseLightAPI()
-neurons_metadata = mlapi.fetch_neurons_metadata(
-    filterby="soma", filter_regions=["MOs"]
-)
-
-to_add = [neurons_metadata[47], neurons_metadata[51]]
-neurons = mlapi.download_neurons(to_add)
-neurons = scene.add(*make_neurons(*neurons, neurite_radius=12))
+try:
+    mlapi = MouseLightAPI()
+    neurons_metadata = mlapi.fetch_neurons_metadata(
+        filterby="soma", filter_regions=["MOs"]
+    )
+
+    to_add = [neurons_metadata[47], neurons_metadata[51]]
+    neurons = mlapi.download_neurons(to_add)
+    neurons = scene.add(*make_neurons(*neurons, neurite_radius=12))
+except ConnectionError or requests.exceptions.ReadTimeout as e:
+    print("Failed to download neurons data from neuromorpho.org.")
 
 # Render!
 scene.render()

examples/settings.py

@@ -29,3 +29,6 @@
     brainrender.settings.SHADER_STYLE = shader
     scene = Scene(title=shader)
     scene.render()
+
+brainrender.settings.BACKGROUND_COLOR = "white"  # reset background color
+brainrender.settings.SHOW_AXES = True  # reset axes display