1 files changed, 19 insertions, 0 deletions
diff --git a/plotter/view/puzzletree/nodes/addition.py b/plotter/view/puzzletree/nodes/addition.py
new file mode 100755
index 0000000..d6b37dc
--- /dev/null
+++ b/plotter/view/puzzletree/nodes/addition.py
@@ -0,0 +1,19 @@
+
+from .binaryoperator import BinaryOperator as _BinaryOperator
+from gettext import gettext as _
+
+
+class Addition(_BinaryOperator):
+    """Addition is a BinaryOperator that adds its two children together."""
+
+    CLASS = "addition"
+    background = _BinaryOperator.loadbackground("addition.svg")
+    operatorstring = "+"
+    title = _("Addition")
+    description = _("Combines two objects together into a larger collection."
+        " For example, x + x = 2x.")
+
+    def __call__(self, x):
+        """Returns self's leftchild(x) + rightchild(x)."""
+        return self.children[0](x) + self.children[1](x)
+