replace settings=None with {}

src/ifcopenshell-python/ifcopenshell/api/material/add_constituent.py

@@ -2,7 +2,7 @@ import ifcopenshell
 
 
 class Usecase:
-    def __init__(self, file, settings=None):
+    def __init__(self, file, settings={}):
         self.file = file
         self.settings = {"constituent_set": None, "material": None}
         for key, value in settings.items():

src/ifcopenshell-python/ifcopenshell/api/material/add_layer.py

@@ -2,7 +2,7 @@ import ifcopenshell
 
 
 class Usecase:
-    def __init__(self, file, settings=None):
+    def __init__(self, file, settings={}):
         self.file = file
         self.settings = {"layer_set": None, "material": None}
         for key, value in settings.items():

src/ifcopenshell-python/ifcopenshell/api/material/add_list_item.py

@@ -2,7 +2,7 @@ import ifcopenshell
 
 
 class Usecase:
-    def __init__(self, file, settings=None):
+    def __init__(self, file, settings={}):
         self.file = file
         self.settings = {"material_list": None, "material": None}
         for key, value in settings.items():

src/ifcopenshell-python/ifcopenshell/api/material/add_material.py

@@ -2,7 +2,7 @@ import ifcopenshell
 
 
 class Usecase:
-    def __init__(self, file, settings=None):
+    def __init__(self, file, settings={}):
         self.file = file
         self.settings = {"Name": "Unnamed"}
         for key, value in settings.items():

src/ifcopenshell-python/ifcopenshell/api/material/assign_material.py

@@ -2,7 +2,7 @@ import ifcopenshell
 
 
 class Usecase:
-    def __init__(self, file, settings=None):
+    def __init__(self, file, settings={}):
         self.file = file
         self.settings = {"product": None, "type": "IfcMaterial", "material": None}
         for key, value in settings.items():

src/ifcopenshell-python/ifcopenshell/api/material/edit_assigned_material.py

@@ -1,5 +1,5 @@
 class Usecase():
-    def __init__(self, file, settings=None):
+    def __init__(self, file, settings={}):
         self.file = file
         self.settings = {
             "element": None,

src/ifcopenshell-python/ifcopenshell/api/material/edit_constituent.py

@@ -1,5 +1,5 @@
 class Usecase():
-    def __init__(self, file, settings=None):
+    def __init__(self, file, settings={}):
         self.file = file
         self.settings = {
             "constituent": None,

src/ifcopenshell-python/ifcopenshell/api/material/edit_layer.py

@@ -1,5 +1,5 @@
 class Usecase():
-    def __init__(self, file, settings=None):
+    def __init__(self, file, settings={}):
         self.file = file
         self.settings = {
             "layer": None,

src/ifcopenshell-python/ifcopenshell/api/material/edit_profile.py

@@ -1,5 +1,5 @@
 class Usecase():
-    def __init__(self, file, settings=None):
+    def __init__(self, file, settings={}):
         self.file = file
         self.settings = {
             "profile": None,

src/ifcopenshell-python/ifcopenshell/api/material/remove_constituent.py

@@ -2,7 +2,7 @@ import ifcopenshell
 
 
 class Usecase:
-    def __init__(self, file, settings=None):
+    def __init__(self, file, settings={}):
         self.file = file
         self.settings = {"constituent": None}
         for key, value in settings.items():

src/ifcopenshell-python/ifcopenshell/api/material/remove_layer.py

@@ -2,7 +2,7 @@ import ifcopenshell
 
 
 class Usecase:
-    def __init__(self, file, settings=None):
+    def __init__(self, file, settings={}):
         self.file = file
         self.settings = {"layer": None}
         for key, value in settings.items():

src/ifcopenshell-python/ifcopenshell/api/material/remove_list_item.py

@@ -2,7 +2,7 @@ import ifcopenshell
 
 
 class Usecase:
-    def __init__(self, file, settings=None):
+    def __init__(self, file, settings={}):
         self.file = file
         self.settings = {"material_list": None, "material": None}
         for key, value in settings.items():

src/ifcopenshell-python/ifcopenshell/api/material/remove_material.py

@@ -2,7 +2,7 @@ import ifcopenshell
 
 
 class Usecase:
-    def __init__(self, file, settings=None):
+    def __init__(self, file, settings={}):
         self.file = file
         self.settings = {"material": None}
         for key, value in settings.items():

src/ifcopenshell-python/ifcopenshell/api/material/reorder_set_item.py

@@ -1,5 +1,5 @@
 class Usecase:
-    def __init__(self, file, settings=None):
+    def __init__(self, file, settings={}):
         self.file = file
         self.settings = {"material_set": None, "old_index": 0, "new_index": 0}
         for key, value in settings.items():

src/ifcopenshell-python/ifcopenshell/api/material/unassign_material.py

@@ -2,7 +2,7 @@ import ifcopenshell
 
 
 class Usecase:
-    def __init__(self, file, settings=None):
+    def __init__(self, file, settings={}):
         self.file = file
         self.settings = {"product": None}
         for key, value in settings.items():