examples: remove usage of obsolete paramter kw

Author: mloubout

examples/seismic/inversion/__init__.py

@@ -0,0 +1,2 @@
+from .inversion_utils import *  # noqa: F401
+from .fwi import *  # noqa: F401

examples/seismic/model.py

@@ -169,13 +169,13 @@ def physical_params(self, **kwargs):
         known = [getattr(self, i) for i in self.physical_parameters]
         return {i.name: kwargs.get(i.name, i) or i for i in known}
 
-    def _gen_phys_param(self, field, name, space_order, is_param=True,
-                        default_value=0, avg_mode='arithmetic', **kwargs):
+    def _gen_phys_param(self, field, name, space_order, default_value=0,
+                        avg_mode='arithmetic', **kwargs):
         if field is None:
             return default_value
         if isinstance(field, np.ndarray):
             function = Function(name=name, grid=self.grid, space_order=space_order,
-                                parameter=is_param, avg_mode=avg_mode)
+                                avg_mode=avg_mode)
             initialize_function(function, field, self.padsizes)
         else:
             function = Constant(name=name, value=field, dtype=self.grid.dtype)
@@ -306,9 +306,8 @@ def _initialize_physics(self, vp, space_order, **kwargs):
         # Initialize elastic with Lame parametrization
         if 'vs' in kwargs:
             vs = kwargs.pop('vs')
-            self.lam = self._gen_phys_param((vp**2 - 2. * vs**2)/b, 'lam', space_order,
-                                            is_param=True)
-            self.mu = self._gen_phys_param(vs**2 / b, 'mu', space_order, is_param=True,
+            self.lam = self._gen_phys_param((vp**2 - 2. * vs**2)/b, 'lam', space_order)
+            self.mu = self._gen_phys_param(vs**2 / b, 'mu', space_order,
                                            avg_mode='harmonic')
         else:
             # All other seismic models have at least a velocity