resolved comments by christian b This closes #273

changelog.md

@@ -10,7 +10,7 @@ Changes since Flatland 2.0.0
 - agent attribute `next_malfunction`is not used anymore, it will be removed fully in future versions.
 - `break_agent()` function is introduced which induces malfunctions in agent according to poisson process
 - `_fix_agent_after_malfunction()` fixes agents after attribute `malfunction == 0`
-- Intoduced the concept of malfunction generators. Here you can add different malfunction models in future updates. Currently it only loads from files and parameters.
+- Introduced the concept of malfunction generators. Here you can add different malfunction models in future updates. Currently it only loads from files and parameters.
 
 ### Changes in `Environment`
 - moving of member variable `distance_map_computed` to new class `DistanceMap`

flatland/envs/malfunction_generators.py

@@ -26,7 +26,7 @@ def _malfunction_prob(rate: float) -> float:
         return 1 - np.exp(- (1 / rate))
 
 
-def malfunction_from_file(filename) -> Tuple[MalfunctionGenerator, MalfunctionProcessData]:
+def malfunction_from_file(filename: str) -> Tuple[MalfunctionGenerator, MalfunctionProcessData]:
     """
     Utility to load pickle file