--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/planemo/lib/python3.7/site-packages/galaxy/util/dictifiable.py	Fri Jul 31 00:32:28 2020 -0400
@@ -0,0 +1,68 @@
+import datetime
+import uuid
+
+
+def dict_for(obj, **kwds):
+    # Create dict to represent item.
+    return dict(
+        model_class=obj.__class__.__name__,
+        **kwds
+    )
+
+
+class Dictifiable(object):
+    """ Mixin that enables objects to be converted to dictionaries. This is useful
+        when for sharing objects across boundaries, such as the API, tool scripts,
+        and JavaScript code. """
+
+    def to_dict(self, view='collection', value_mapper=None):
+        """
+        Return item dictionary.
+        """
+
+        if not value_mapper:
+            value_mapper = {}
+
+        def get_value(key, item):
+            """
+            Recursive helper function to get item values.
+            """
+            # FIXME: why use exception here? Why not look for key in value_mapper
+            # first and then default to to_dict?
+            try:
+                return item.to_dict(view=view, value_mapper=value_mapper)
+            except Exception:
+                if key in value_mapper:
+                    return value_mapper.get(key)(item)
+                if type(item) == datetime.datetime:
+                    return item.isoformat()
+                elif type(item) == uuid.UUID:
+                    return str(item)
+                # Leaving this for future reference, though we may want a more
+                # generic way to handle special type mappings going forward.
+                # If the item is of a class that needs to be 'stringified' before being put into a JSON data structure
+                # elif type(item) in []:
+                #    return str(item)
+                return item
+
+        # Create dict to represent item.
+        rval = dict_for(self)
+
+        # Fill item dict with visible keys.
+        try:
+            visible_keys = self.__getattribute__('dict_' + view + '_visible_keys')
+        except AttributeError:
+            raise Exception('Unknown Dictifiable view: %s' % view)
+        for key in visible_keys:
+            try:
+                item = self.__getattribute__(key)
+                if isinstance(item, list):
+                    rval[key] = []
+                    for i in item:
+                        rval[key].append(get_value(key, i))
+                else:
+                    rval[key] = get_value(key, item)
+            except AttributeError:
+                rval[key] = None
+
+        return rval