Make it easy to check whether a graph already contains a task with th…

…e given name.
shead-custom-design · Oct 22, 2020 · eca3076 · eca3076
1 parent 0cd3a49
commit eca3076
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/graphcat/__init__.py b/graphcat/__init__.py
@@ -98,6 +98,10 @@ def __init__(self):
         self._on_update = blinker.Signal()
 
 
+    def __contains__(self, name):
+        return name in self._graph
+
+
     def _require_valid_names(self, names):
         if names is None:
             return self.tasks()