simplify param resolution

Author: NeloBlivion

discord/ui/action_row.py

@@ -164,14 +164,7 @@ def add_item(
         TypeError
             A :class:`ViewItem` was not passed.
         """
-        if (
-            before is not None
-            and after is not None
-            or before is not None
-            and (index is not None)
-            or after is not None
-            and (index is not None)
-        ):
+        if sum(x is not None for x in (before, after, index)) > 1:
             raise ValueError("Can only specify one of before, after, and index.")
 
         if not isinstance(item, (Select, Button)):

discord/ui/container.py

@@ -180,14 +180,7 @@ def add_item(
         TypeError
             A :class:`ViewItem` was not passed.
         """
-        if (
-            before is not None
-            and after is not None
-            or before is not None
-            and (index is not None)
-            or after is not None
-            and (index is not None)
-        ):
+        if sum(x is not None for x in (before, after, index)) > 1:
             raise ValueError("Can only specify one of before, after, and index.")
 
         if not isinstance(item, ViewItem):

discord/ui/section.py

@@ -170,14 +170,7 @@ def add_item(
         ValueError
             Maximum number of items has been exceeded (3).
         """
-        if (
-            before is not None
-            and after is not None
-            or before is not None
-            and (index is not None)
-            or after is not None
-            and (index is not None)
-        ):
+        if sum(x is not None for x in (before, after, index)) > 1:
             raise ValueError("Can only specify one of before, after, and index.")
 
         if len(self.items) >= 3:

discord/ui/view.py

@@ -960,14 +960,7 @@ def add_item(
         ValueError
             Maximum number of items has been exceeded (40)
         """
-        if (
-            before is not None
-            and after is not None
-            or before is not None
-            and (index is not None)
-            or after is not None
-            and (index is not None)
-        ):
+        if sum(x is not None for x in (before, after, index)) > 1:
             raise ValueError("Can only specify one of before, after, and index.")
 
         if len(self) >= self.MAX_ITEMS: