td.py: + TDBlock._class_specific_params(); release.py: bump version to 0.3.4

Author: cknoll

src/pyblocksim/release.py

@@ -1 +1 @@
-__version__ = "0.3.3"
+__version__ = "0.3.4"

src/pyblocksim/td.py

@@ -133,10 +133,17 @@ def __init__(self, name: str = None, input1=None, params=None, **kwargs):
         for i, var in enumerate(self.input_vars, start=1):
             setattr(self, f"u{i}", var)
 
-        if params is None:
-            params = {}
-        self.params = params
-        self.__dict__.update(params)
+        # params provided (hardcoded) by the class
+
+        self.params = self._class_specific_params()
+
+        # params provided by the constructor (can overwrite class parameters)
+        if params is not None:
+            assert isinstance(params, dict)
+            self.params.update(params)
+
+        # save them as attributes
+        self.__dict__.update(self.params)
 
         # make each state variable available as `self.x1`, `self.x2`, ...
         for i, x_i in enumerate(self.state_vars, start=1):
@@ -151,6 +158,13 @@ def __init__(self, name: str = None, input1=None, params=None, **kwargs):
 
         ds.register_block(self)
 
+    def _class_specific_params(self):
+        """
+        enables to specify parameters in subclasses
+        """
+        return {}
+
+
     def set_inputs(self, input1, **kwargs):
 
         if input1 is None: