Fix Python2 incompatibility by removing an f-string.

Author: Ludwig Schubert

lucid/modelzoo/vision_base.py

@@ -157,7 +157,9 @@ def get_layer(self, name):
       if name.lower() in layer.name.lower():
         log.warning("Found layer by fuzzy matching, please use '%s' in the future!", layer.name)
         return layer
-    raise KeyError(f"Could not find layer with name '{name}'! Existing layer names are: {[l.name for l in self.layers]}")
+    key_error_message = "Could not find layer with name '%s'! Existing layer names are: %s"
+    layer_names = str([l.name for l in self.layers]))
+    raise KeyError(key_error_message.format(name, layer_names))
 
 
 class SerializedModel(Model):

setup.py

@@ -18,7 +18,7 @@
 
 from setuptools import setup, find_packages
 
-version = "0.3.4"
+version = "0.3.5"
 
 test_deps = ["future", "twine", "pytest", "pytest-mock", "python-coveralls"]