From 5997879f3632a09faf807db86c26f5ba71b219bf Mon Sep 17 00:00:00 2001
From: "Thomson, Alec (S&A, Kensington)" <AlecThomson@users.noreply.github.com>
Date: Fri, 2 Dec 2022 16:57:47 +0800
Subject: [PATCH] ~ and not are not not

---
 structurefunction.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/structurefunction.py b/structurefunction.py
index 4916d98..2d4af6f 100644
--- a/structurefunction.py
+++ b/structurefunction.py
@@ -836,7 +836,7 @@ def structure_function(
     # Get the angular separation of the source pairs
 
     # Check if coords have distance
-    has_distance = ~issubclass(
+    has_distance = not issubclass(
         coords.data.__class__,
         UnitSphericalRepresentation,
     )