Initial commit

ComfyUI-FString/fstring_node.py

@@ -0,0 +1,42 @@
+# AI Disclosure: Code comments were generated with AI but manually checked for correctness.
+
+class SimpleFStringNode:
+    @classmethod
+    def INPUT_TYPES(s):
+        return {
+            "required": {
+                "template": ("STRING", {
+                    "multiline": True,
+                    "default": "The value of x is {x}"
+                }),
+            },
+            # We leave "optional" empty.
+            # The JS will force new inputs into the node, and ComfyUI
+            # will pass them to our function automatically.
+            "optional": {}
+        }
+
+    RETURN_TYPES = ("STRING",)
+    RETURN_NAMES = ("formatted_string",)
+    FUNCTION = "format_inputs"
+    CATEGORY = "Learning/Text"
+
+    # We use **kwargs to catch all the dynamic inputs created in the UI
+    def format_inputs(self, template, **kwargs):
+        clean_values = {}
+        for key, val in kwargs.items():
+            if val is None:
+                clean_values[key] = "None"
+            elif hasattr(val, 'shape'):
+                clean_values[key] = f"Tensor {val.shape}"
+            else:
+                clean_values[key] = str(val)
+
+        try:
+            result = template.format(**clean_values)
+        except KeyError as e:
+            result = f"Error: Template uses {{{e.args[0]}}} but that input doesn't exist!"
+        except Exception as e:
+            result = f"Error: {str(e)}"
+
+        return (result,)