Write documentation for pset_template API module

src/ifcopenshell-python/ifcopenshell/api/pset_template/edit_pset_template.py

@@ -18,11 +18,30 @@
 
 
 class Usecase:
-    def __init__(self, file, **settings):
+    def __init__(self, file, pset_template=None, attributes=None):
+        """Edits the attributes of an IfcPropertySetTemplate
+
+        For more information about the attributes and data types of an
+        IfcPropertySetTemplate, consult the IFC documentation.
+
+        :param pset_template: The IfcPropertySetTemplate entity you want to edit
+        :type pset_template: ifcopenshell.entity_instance.entity_instance
+        :param attributes: a dictionary of attribute names and values.
+        :type attributes: dict, optional
+        :return: None
+        :rtype: None
+
+        Example::
+
+            # Whoops! We named it with a buildingSMART reserved "Pset_" prefix!
+            template = ifcopenshell.api.run("pset_template.add_pset_template", model, name="Pset_RiskFactors")
+
+            # Let's fix it to prefix with our company code instead.
+            ifcopenshell.api.run("pset_template.edit_pset_template", model,
+                pset_template=template, attributes={"Name": "ABC_RiskFactors"})
+        """
         self.file = file
-        self.settings = {"pset_template": None, "attributes": {}}
-        for key, value in settings.items():
-            self.settings[key] = value
+        self.settings = {"pset_template": pset_template, "attributes": attributes or {}}
 
     def execute(self):
         for name, value in self.settings["attributes"].items():