fix: set traci default view if it doesn't exist

docs/documentation/observations.md

@@ -1,6 +1,6 @@
 # Observation Functions
 
-To create a new obsevation function, you must create a class that inherits from the ObservationFunction class:
+To create a new observation function, you must create a class that inherits from the ObservationFunction class:
 
 ```{eval-rst}
 .. autoclass:: sumo_rl.environment.observations.ObservationFunction

pyproject.toml

@@ -87,13 +87,16 @@ reportInvalidTypeVarUse = "none"
 # reportUnknownVariableType = "warning"  # -> raises warnings
 # reportUnknownArgumentType = "warning"  # -> raises warnings
 reportGeneralTypeIssues = "none"  # -> commented out raises 489 errors
+reportArgumentType = "none"
 reportUntypedFunctionDecorator = "none"  # -> pytest.mark.parameterize issues
 
 reportOptionalMemberAccess = "none" # -> commented out raises warnings
 reportPrivateImportUsage = "warning" # -> this raises warnings because we use not exported modules from gym (wrappers)
 
 reportPrivateUsage = "warning"
 reportUnboundVariable = "warning"
+reportCallIssue = "warning"
+reportAttributeAccessIssue = "warning"
 
 [tool.pytest.ini_options]
 filterwarnings = ['ignore:.*The environment .* is out of date.*']

sumo_rl/environment/env.py

@@ -236,6 +236,8 @@ def _start_simulation(self):
             self.sumo = traci.getConnection(self.label)
 
         if self.use_gui or self.render_mode is not None:
+            if "DEFAULT_VIEW" not in dir(traci.gui):  # traci.gui.DEFAULT_VIEW is not defined in libsumo
+                traci.gui.DEFAULT_VIEW = "View #0"
             self.sumo.gui.setSchema(traci.gui.DEFAULT_VIEW, "real world")
 
     def reset(self, seed: Optional[int] = None, **kwargs):

sumo_rl/environment/resco_envs.py

@@ -13,7 +13,7 @@ def grid4x4(parallel=True, **kwargs):
 
     Number of agents = 16
     Number of actions = 4
-    Agents have the same obsevation and action space
+    Agents have the same observation and action space
     """
     kwargs.update(
         {
@@ -33,7 +33,7 @@ def arterial4x4(parallel=True, **kwargs):
 
     Number of agents = 16
     Number of actions = 5
-    Agents have the same obsevation and action space
+    Agents have the same observation and action space
     """
     kwargs.update(
         {
@@ -73,7 +73,7 @@ def cologne3(parallel=True, **kwargs):
 
     Number of agents: 3
     Number of actions: 2 agents with 4 actions and 1 agent with 3 actions
-    2 agents have the same obsevation and action space and 1 has different spaces
+    2 agents have the same observation and action space and 1 has different spaces
     """
     kwargs.update(
         {