Improve lfpy example scripts

Author: Jaquier Aurélien Tristan

examples/l5pc_lfpy/generate_extra_features.py

@@ -81,9 +81,8 @@ def default(self, obj):
 
 def dict_to_json(data, path):
     """Save some data in a json file."""
-    s = json.dumps(data, indent=2, cls=NumpyEncoder)
     with open(path, "w") as f:
-        f.write(s)
+        json.dump(data, f, indent=2, cls=NumpyEncoder)
 
 
 def add_extra_objectives(evaluator):

examples/l5pc_lfpy/l5pc_lfpy_evaluator.py

@@ -88,7 +88,8 @@ def get_recording_names(protocol_name, location=None):
 
 def define_fitness_calculator(protocols, feature_file):
 
-    feature_definitions = json.load(open(feature_file))
+    with open(feature_file, "r") as f:
+        feature_definitions = json.load(f)
 
     objectives = []
     threshold = -20