bimtester: improve imports in steps

src/ifcbimtester/bimtester/features/steps/classification.py

@@ -1,6 +1,9 @@
 import json
 from behave import step
-from utils import IfcFile, assert_attribute, assert_type
+
+from utils import assert_attribute
+from utils import assert_type
+from utils import IfcFile
 
 
 def get_classification(name):

src/ifcbimtester/bimtester/features/steps/element_classes.py

@@ -1,5 +1,8 @@
 from behave import step
-from utils import IfcFile, assert_attribute, assert_type
+
+from utils import assert_attribute
+from utils import assert_type
+from utils import IfcFile
 
 
 @step("The element {guid} is an {ifc_class} only")

src/ifcbimtester/bimtester/features/steps/project_setup.py

@@ -1,6 +1,7 @@
 from behave import step
+
+from utils import assert_attribute
 from utils import IfcFile
-from utils import IfcFile, assert_attribute
 
 
 @step('The IFC file "{file}" must be provided')

src/ifcbimtester/bimtester/features/steps/steps.py

@@ -1,4 +1,5 @@
 from behave import step
+
 from utils import IfcFile