| import ast |
| import operator as op |
|
|
| operators = { |
| ast.Add: op.add, |
| ast.Sub: op.sub, |
| ast.Mult: op.mul, |
| ast.Div: op.truediv, |
| ast.FloorDiv: op.floordiv, |
| ast.Pow: op.pow, |
| ast.BitXor: op.xor, |
| ast.USub: op.neg, |
| ast.Mod: op.mod |
| } |
|
|
|
|
| class MathExpression: |
|
|
| @classmethod |
| def INPUT_TYPES(cls): |
| return { |
| "required": { |
| "expression": ("STRING", {"multiline": True, "dynamicPrompts": False}), |
| }, |
| "optional": { |
| "a": ("FLOAT", {"forceInput": True}), |
| "b": ("FLOAT", {"forceInput": True}), |
| "c": ("FLOAT", {"forceInput": True}), |
| }, |
| "hidden": {"extra_pnginfo": "EXTRA_PNGINFO", |
| "prompt": "PROMPT"}, |
| } |
|
|
| RETURN_TYPES = ("INT", "FLOAT", "STRING", ) |
| FUNCTION = "evaluate" |
| CATEGORY = "utils" |
|
|
| def get_widget_value(self, extra_pnginfo, prompt, node_name, widget_name): |
| workflow = extra_pnginfo["workflow"] |
| node_id = None |
| for node in workflow["nodes"]: |
| name = node["type"] |
| if "properties" in node: |
| if "Node name for S&R" in node["properties"]: |
| name = node["properties"]["Node name for S&R"] |
| if name == node_name: |
| node_id = node["id"] |
| break |
| if "title" in node: |
| name = node["title"] |
| if name == node_name: |
| node_id = node["id"] |
| break |
| if node_id is not None: |
| values = prompt[str(node_id)] |
| if "inputs" in values: |
| if widget_name in values["inputs"]: |
| return values["inputs"][widget_name] |
| raise NameError(f"Widget not found: {node_name}.{widget_name}") |
| raise NameError(f"Node not found: {node_name}.{widget_name}") |
|
|
| def evaluate(self, expression, extra_pnginfo, prompt, a=None, b=None, c=None): |
| expression = expression.replace('\n', ' ').replace('\r', '') |
| node = ast.parse(expression, mode='eval').body |
|
|
| def eval_expr(node): |
| if isinstance(node, ast.Num): |
| return node.n |
| elif isinstance(node, ast.BinOp): |
| return operators[type(node.op)](eval_expr(node.left), eval_expr(node.right)) |
| elif isinstance(node, ast.UnaryOp): |
| return operators[type(node.op)](eval_expr(node.operand)) |
| elif isinstance(node, ast.Attribute): |
| return self.get_widget_value(extra_pnginfo, prompt, node.value.id, node.attr) |
| elif isinstance(node, ast.Name): |
| if node.id == "a": |
| return a |
| if node.id == "b": |
| return b |
| if node.id == "c": |
| return c |
| raise NameError(f"Name not found: {node.id}") |
| else: |
| raise TypeError(node) |
|
|
| r = eval_expr(node) |
| return (int(r), float(r), str(r)) |
|
|
|
|
| NODE_CLASS_MAPPINGS = { |
| "MathExpression|pysssss": MathExpression, |
| } |
|
|
| NODE_DISPLAY_NAME_MAPPINGS = { |
| "MathExpression|pysssss": "Math Expression 🐍", |
| } |
|
|
